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Deciphering the Pulsations of G 29-38 with Optical Time Series SpectroscopyJul 10 2008We present optical time series spectroscopy of the pulsating white dwarf star G29-38 taken at the Very Large Telescope (VLT). By measuring the variations in brightness, Doppler shift, and line shape of each spectrum, we explore the physics of pulsation ... More

Blood ties: ABO is a trans-species polymorphism in primatesAug 22 2012The ABO histo-blood group, the critical determinant of transfusion incompatibility, was the first genetic polymorphism discovered in humans. Remarkably, ABO antigens are also polymorphic in many other primates, with the same two amino acid changes responsible ... More

KIC 3749404: A heartbeat Star with Rapid Apsidal Advance Indicative of a Tertiary ComponentAug 08 2016Heartbeat stars are eccentric (e > 0.2) ellipsoidal variables whose light curves resemble a cardiogram. We present the observations and corresponding model of KIC 3749404, a highly eccentric (e = 0.66), short period (P = 20.3 d) heartbeat star with tidally ... More

Sensitivity Analyses of Exoplanet Occurrence Rates from Kepler and GaiaAug 01 2019We infer the number of planets-per-star as a function of orbital period and planet size using $Kepler$ archival data products with updated stellar properties from the $Gaia$ Data Release 2. Using hierarchical Bayesian modeling and Hamiltonian Monte Carlo, ... More

White Dwarf Variability with gPhoton: PulsatorsDec 19 2017We present results from a search for short time-scale white dwarf variability using \texttt{gPhoton}, a time-tagged database of \textit{GALEX} photon events and associated software package. We conducted a survey of $320$ white dwarf stars in the McCook-Sion ... More

Characteristics of Optimal Solutions to the Sensor Location ProblemJun 02 2011In [Bianco, L., Giuseppe C., and P. Reverberi. 2001. "A network based model for traffic sensor location with implications on O/D matrix estimates". Transportation Science 35(1):50-60.], the authors present the Sensor Location Problem: that of locating ... More

A Correspondence Between Distances and Embeddings for Manifolds: New Techniques for Applications of the Abstract BoundaryApr 18 2011We present a one-to-one correspondence between equivalence classes of embeddings of a manifold (into a larger manifold of the same dimension) and equivalence classes of certain distances on the manifold. This correspondence allows us to use the Abstract ... More

Maximum Entropy estimation of probability distribution of variables in higher dimensions from lower dimensional dataMay 05 2015A common statistical situation concerns inferring an unknown distribution Q(x) from a known distribution P(y), where X (dimension n), and Y (dimension m) have a known functional relationship. Most commonly, n<m, and the task is relatively straightforward. ... More

High-resolution near-infrared imaging of the Orion 114-426 silhouette diskOct 31 1997We present the first high-resolution near-infrared images of the edge-on silhouette circumstellar disk, Orion 114-426, made using NICMOS on the Hubble Space Telescope. Images taken against the bright nebular background of the ionized hydrogen Pa$\alpha$ ... More

Diboson Production and CouplingsOct 20 2008We present the most recent cross section measurements for WW and WZ production in proton-antiproton collisions with sqrt(s) = 1.96 TeV at the Fermilab Tevatron in final states with two or three leptons, respectively, along with limits on WWZ triple gauge ... More

Uniform Modeling of KOIs: MCMC Data Release NotesApr 02 2015The Kepler Mission used a 0.95-m aperture space-based telescope to continuously observe more than 150 000 stars for 4 years. We model and analyze most KOIs listed at the Exoplanet Archive using the Kepler data. This document describes data products related ... More

Discovery of Photospheric Calcium Line Strength Variations in the DAZd White Dwarf G29-38Feb 25 2007Metals in the photospheres of white dwarfs with Teff between 12,000 and 25,000 K should gravitationally settle out of these atmospheres in 1-2 weeks. Temporal variations in the line strengths of these metals could provide a direct measurement of episodic ... More

Irrelevant Exceptional Divisors for Curves on a Smooth SurfaceNov 24 2006Aug 28 2007Given a singular curve on a smooth surface, we determine which exceptional divisors on the minimal resolution of that curve contribute toward its jumping numbers.

Detection of Potential Transit Signals in 17 Quarters of Kepler Data: Results of the Final Kepler Mission Transiting Planet Search (DR25)Apr 20 2016Nov 16 2016We present results of the final Kepler Data Processing Pipeline search for transiting planet signals in the full 17-quarter primary mission data set. The search includes a total of 198,709 stellar targets, of which 112,046 were observed in all 17 quarters ... More

Span, Cospan, and Other Double CategoriesJan 18 2012Given a double category D such that D_0 has pushouts, we characterize oplax/lax adjunctions between D and Cospan(D_0) such that the right adjoint is normal and restricts to the identity on D_0, where Cospan(D_0) denotes the double category on D_0 whose ... More

Non-Hamiltonian actions with isolated fixed pointsOct 09 2015We construct a non-Hamiltonian symplectic circle action on a closed, connected, six-dimensional symplectic manifold with exactly 32 fixed points.

Transit Timing Observations from Kepler: I. Statistical Analysis of the First Four MonthsFeb 02 2011Jul 01 2011The architectures of multiple planet systems can provide valuable constraints on models of planet formation, including orbital migration, and excitation of orbital eccentricities and inclinations. NASA's Kepler mission has identified 1235 transiting planet ... More

Studies of inflation and dark energy with coupled scalar fieldsFeb 03 2015Currently there is no definitive description for the accelerated expansion of the Universe at both early and late times; we know these two periods as the epochs of inflation and dark energy. Contained within this Thesis are two studies of inflation and ... More

Depths of Powers of the Edge Ideal of a TreeAug 04 2009Lower bounds are given for the depths of R/I^t for t at least one when I is the edge ideal of a tree or forest. The bounds are given in terms of the diameter of the tree, or in case of a forest, the largest diameter of a connected component and the number ... More

Exponentiability via Double CategoriesDec 06 2011Apr 24 2012We use double categories to obtain a single theorem characterizing certain exponentiable morphisms of small categories, topological spaces, locales, and posets.

First Results from the Swarms Survey. SDSS 1257+5428: A Nearby, Massive White Dwarf Binary with a Likely Neutron Star or Black Hole CompanionOct 14 2009We present the first results from SWARMS (Sloan White dwArf Radial velocity data Mining Survey), an ongoing project to identify compact white dwarf (WD) binaries in the spectroscopic catalog of the Sloan Digital Sky Survey. The first object identified ... More

Twins: The Two Shortest Period Non-Interacting Double Degenerate White Dwarf StarsNov 09 2009We report on the detection of the two shortest period non-interacting white dwarf binary systems. These systems, SDSS J143633.29+501026.8 and SDSS J105353.89+520031.0, were identified by searching for radial velocity variations in the individual exposures ... More

Visualising high-dimensional state spaces with "Tuple Plots"May 12 2019Complex systems are described with high-dimensional data that is hard to visualise. Inselberg's parallel coordinates are one representation technique for visualising high-dimensional data. Here we generalise Inselberg's approach, and use it for visualising ... More

A Non-Radial Oscillation Model for Pulsar State SwitchingJan 04 2011Pulsars are unique astrophysical laboratories because of their clock-like timing precision, providing new ways to test general relativity and detect gravitational waves. One impediment to high-precision pulsar timing experiments is timing noise. Recently ... More

Kepler-62f: Kepler's First Small Planet in the Habitable Zone, but Is It Real?May 14 2019May 15 2019Kepler-62f is the first exoplanet small enough to plausibly have a rocky composition orbiting within the habitable zone (HZ) discovered by the Kepler Mission. The planet is 1.4 times the size of the Earth and has an orbital period of 267 days. At the ... More

Generalizations of the Abstract Boundary singularity theoremAug 19 2015The Abstract Boundary singularity theorem was first proven by Ashley and Scott. It links the existence of incomplete causal geodesics in strongly causal, maximally extended spacetimes to the existence of Abstract Boundary essential singularities, i.e., ... More

Depth and regularity of monomial ideals via polarization and combinatorial optimizationMar 06 2018Oct 18 2018In this paper we use polarization to study the behavior of the depth and regularity of a monomial ideal $I$, locally at a variable $x_i$, when we lower the degree of all the highest powers of the variable $x_i$ occurring in the minimal generating set ... More

Kepler-62f: Kepler's First Small Planet in the Habitable Zone, but Is It Real?May 14 2019Kepler-62f is the first exoplanet small enough to plausibly have a rocky composition orbiting within the habitable zone (HZ) discovered by the Kepler Mission. The planet is 1.4 times the size of the Earth and has an orbital period of 267 days. At the ... More

Cyclic Adams OperationsJan 19 2016Feb 22 2016Let $Q$ be a commutative, Noetherian ring and $Z \subseteq \operatorname{Spec}(Q)$ a closed subset. Define $K_0^Z(Q)$ to be the Grothendieck group of those bounded complexes of finitely generated projective $Q$-modules that have homology supported on ... More

Geometrical Distance Determination using Type I X-ray BurstsJun 26 2006With the excellent angular resolution of the Chandra X-ray Observatory, it is possible to geometrically determine the distance to variable Galactic sources, based on the phenomenon that scattered radiation appearing in the X-ray halo has to travel along ... More

Atmospheric muon background in the ANTARES detectorOct 28 2005An evaluation of the background due to atmospheric muons in the ANTARES high energy neutrino telescope is presented. Two different codes for atmospheric shower simulation have been used. Results from comparisons between these codes at sea level and detector ... More

Two Earth-sized planets orbiting Kepler-20Dec 20 2011Since the discovery of the first extrasolar giant planets around Sun-like stars, evolving observational capabilities have brought us closer to the detection of true Earth analogues. The size of an exoplanet can be determined when it periodically passes ... More

The ACIGA Data Analysis programmeFeb 10 2004The Data Analysis programme of the Australian Consortium for Interferometric Gravitational Astronomy (ACIGA) was set up in 1998 by the first author to complement the then existing ACIGA programmes working on suspension systems, lasers and optics, and ... More

A Probabilistic Approach to Kepler Completeness and Reliability for Exoplanet Occurrence RatesJun 09 2019Exoplanet catalogs produced by surveys suffer from a lack of completeness (not every planet is detected) and less than perfect reliability (not every planet in the catalog is a true planet). Occurrence rate studies of the exoplanet population structure ... More

Planetary Candidates Observed by Kepler IV: Planet Sample From Q1-Q8 (22 Months)Dec 18 2013We provide updates to the Kepler planet candidate sample based upon nearly two years of high-precision photometry (i.e., Q1-Q8). From an initial list of nearly 13,400 Threshold Crossing Events (TCEs), 480 new host stars are identified from their flux ... More

Adams Operations on Matrix FactorizationsOct 31 2016We define Adams operations on matrix factorizations, and we show these operations enjoy analogues of several key properties of the Adams operations on perfect complexes with support developed by Gillet-Soul\'e in their paper "Intersection Theory Using ... More

Radiative Corrections to the $K_{e3}^{\pm}$ Decay RevisedOct 03 2002We consider the lowest order radiative corrections for the decay $K^{\pm}\to \pi^0 e^{\pm} \nu$, usually referred as $K_{e3}^{\pm}$ decay. This decay is the best way to extract the value of the $V_{us}$ element of the CKM matrix. The radiative corrections ... More

Estimating the Distribution of Random Parameters in a Diffusion Equation Forward Model for a Transdermal Alcohol BiosensorAug 13 2018We estimate the distribution of random parameters in a distributed parameter model with unbounded input and output for the transdermal transport of ethanol in humans. The model takes the form of a diffusion equation with the input being the blood alcohol ... More

Kepler Eclipsing Binary Stars. VII. The Catalog of Eclipsing Binaries Found in the Entire Kepler Data-SetDec 30 2015The primary Kepler Mission provided nearly continuous monitoring of ~200,000 objects with unprecedented photometric precision. We present the final catalog of eclipsing binary systems within the 105 square degree Kepler field of view. This release incorporates ... More

Kepler-68: Three Planets, One With a Density Between That of Earth and Ice GiantsFeb 11 2013NASA's Kepler Mission has revealed two transiting planets orbiting Kepler-68. Follow-up Doppler measurements have established the mass of the innermost planet and revealed a third jovian-mass planet orbiting beyond the two transiting planets. Kepler-68b, ... More

A Magnetic and Moessbauer Spectral Study of Core/Shell Structured Fe/Au NanoparticlesDec 16 2005Fe/Au nanoparticles have been chemically synthesized through a reverse micelle reaction and investigated by both conventional and synchrotron based x-ray diffraction and by magnetic and Moessbauer spectral studies. The powder x-ray diffraction patterns ... More

The stellar, molecular gas and dust content of the host galaxies of two z~2.8 dust obscured quasarsOct 11 2011We present optical through radio observations of the host galaxies of two dust obscured, luminous quasars selected in the mid-infrared, at z=2.62 and z=2.99, including a search for CO emission. Our limits on the CO luminosities are consistent with these ... More

Density functional theory and DFT+U study of transition metal porphines adsorbed on Au(111) surfaces and effects of applied electric fieldsOct 26 2006We apply Density Functional Theory (DFT) and the DFT+U technique to study the adsorption of transition metal porphine molecules on atomistically flat Au(111) surfaces. DFT calculations using the Perdew-Burke-Ernzerhof (PBE) exchange correlation functional ... More

Fully-automatic segmentation of kidneys in clinical ultrasound images using a boundary distance regression networkJan 05 2019It remains challenging to automatically segment kidneys in clinical ultrasound images due to the kidneys' varied shapes and image intensity distributions, although semi-automatic methods have achieved promising performance. In this study, we developed ... More

Patterns of CP violation from mirror symmetry breaking in the $η\toπ^+π^-π^0$ Dalitz plotMar 27 2019A violation of mirror symmetry in the $\eta\to\pi^+\pi^-\pi^0$ Dalitz plot has long been recognized as a signal of C and CP violation. Here we show how the isospin of the underlying C- and CP-violating structures can be reconstructed from their kinematic ... More

Phenomenology of neutron-antineutron conversionOct 25 2017Nov 15 2017We consider the possibility of neutron-antineutron ($n-\bar n$) conversion, in which the change of a neutron into an antineutron is mediated by an external source, as can occur in a scattering process. We develop the connections between $n-{\bar n}$ conversion ... More

Complete invariants for Hamiltonian torus actions with two dimensional quotientsFeb 18 2002Dec 14 2003We study torus actions on symplectic manifolds with proper moment maps in the case that each reduced space is two-dimensional. We provide a complete set of invariants for such spaces. Our proof uses sheaves of groupoids of Hamiltonian spaces.

Minimal Reductions and Cores of Edge IdealsDec 28 2010Apr 27 2012We study minimal reductions of edge ideals of graphs and determine restrictions on the coefficients of the generators of these minimal reductions. We prove that when $I$ is not basic, then $\core{I}\subset \m I$, where $I$ is an edge ideal in the corresponding ... More

Magnetism and superconductivity in U_2Pt_xRh_(1-x)C_2Jan 26 2015We report the phase diagram of the doping series U_2Pt_xRh_(1-x)C_2, studied through measurements of resistivity, specific heat and magnetic susceptibility. The Neel temperature of U_2RhC_2 of ~ 22 K is suppressed with increasing Pt content, reaching ... More

Two globally convergent nonmonotone trust-region methods for unconstrained optimizationJan 09 2015This paper addresses some trust-region methods equipped with nonmonotone strategies for solving nonlinear unconstrained optimization problems. More specifically, the importance of using nonmonotone techniques in nonlinear optimization is motivated, then ... More

Measures of Anisotropy and the Universal Properties of TurbulenceDec 28 2000Local isotropy, or the statistical isotropy of small scales, is one of the basic assumptions underlying Kolmogorov's theory of universality of small-scale turbulent motion. While, until the mid-seventies or so, local isotropy was accepted as a plausible ... More

Stackable groups, tame filling invariants, and algorithmic properties of groupsSep 28 2011Dec 30 2011We introduce a combinatorial property for finitely generated groups called stackable that implies the existence of an inductive procedure for constructing van Kampen diagrams with respect to a canonical finite presentation. We also define algorithmically ... More

Automating Software Citation using GitCiteFeb 03 2019Aug 01 2019The ability to cite software and give credit to its authors is increasingly important. This paper presents a model for software citation with version control, and an implementation that integrates with Git and GitHub. The implementation includes a browser ... More

A counterexample to the Bernhard-Jablan unknotting conjectureMay 17 2017Dec 31 2017We show that there is a knot satisfying the property that for each minimal crossing number diagram of the knot and each single crossing of the diagram, changing the crossing results in a diagram for a knot whose unknotting number is at least that of the ... More

Processes that break baryon number by two units and the Majorana nature of the neutrinoAug 15 2018Jan 31 2019We employ the simplest possible models of scalar-fermion interactions that are consistent with the gauge symmetries of the Standard Model and permit no proton decay to analyze the connections possible among processes that break baryon number by two units. ... More

Topology of complexity one quotientsOct 02 2018We describe of the topology of the geometric quotients of 2n dimensional compact connected symplectic manifolds with n-1 dimensional torus actions. When the isotropy weights at each fixed point are in general position, the quotient is homeomorphic to ... More

Classifying birationally commutative projective surfacesOct 27 2009Let R be a noetherian connected graded domain of Gelfand-Kirillov dimension 3 over an uncountable algebraically closed field. Suppose that the graded quotient ring of R is a skew-Laurent ring over a field; we say that R is a birationally commutative projective ... More

Minimal Almost ConvexityAug 01 2014In this article we show that the Baumslag-Solitar group $BS(1,2)$ is minimally almost convex, or $MAC$. We also show that $BS(1,2)$ does not satisfy Po\'enaru's almost convexity condition $P(2)$, and hence the condition $P(2)$ is strictly stronger than ... More

No positive cone in a free product is regularSep 20 2016Nov 15 2017We show that there exists no left order on the free product of two nontrivial, finitely generated, left-orderable groups such that the corresponding positive cone is represented by a regular language. Since there are orders on free groups of rank at least ... More

Classification of Hamiltonian torus actions with two dimensional quotientsSep 30 2011May 09 2012We construct all possible Hamiltonian torus actions for which all the non-empty reduced spaces are two dimensional (and not single points) and the manifold is connected and compact, or, more generally, the moment map is proper as a map to a convex set. ... More

Hölder continuity of solutions to the kinematic dynamo equationsApr 02 2014We study the propagation of regularity of solutions to a three dimensional system of linear parabolic PDE known as the kinematic dynamo equations. The divergence free drift velocity is assumed to be at the critical regularity level with respect to the ... More

Existence, uniqueness and regularity results for the viscous magneto-geostrophic equationNov 07 2014Apr 15 2015We study the three dimensional active scalar equation called the magneto-geostropic equation which was proposed by Moffatt and Loper as a model for the geodynamo processes in the Earth's fluid core. When the viscosity of the fluid is positive, the constitutive ... More

Nanoconfined ionic liquids: disentangling electrostatic & viscous forcesJan 03 2018Recent reports of surface forces across nanoconfined ionic liquids have revealed the existence of an anomalously long-ranged interaction apparently of electrostatic origin. Ionic liquids are viscous and therefore it is important to inspect rigorously ... More

Hamiltonian circle actions with minimal fixed setsMay 25 2009Nov 04 2012Consider an effective Hamiltonian circle action on a compact symplectic $2n$-dimensional manifold $(M, \omega)$. Assume that the fixed set $M^{S^1}$ is {\em minimal}, in two senses: it has exactly two components, $X$ and $Y$, and $\dim(X) + \dim(Y) = ... More

Regina Lectures on Fat PointsOct 14 2013These notes are a record of lectures given in the Workshop on Connections Between Algebra and Geometry at the University of Regina, May 29--June 1, 2012. The lectures were meant as an introduction to current research problems related to fat points for ... More

The Peculiar Pulsations of PY VulApr 29 2004The pulsating white dwarf star PY Vul (G~185-32) exhibits pulsation modes with peculiar properties that set it apart from other variable stars in the ZZ Ceti (DAV) class. These peculiarities include a low total pulsation amplitude, a mode with bizarre ... More

Hubble Space Telescope Imaging of the Young Planetary Nebula GL 618Jan 10 2000We present narrow-band Hubble Space Telescope images of the young planetary nebula GL 618. These images have allowed us to study the detailed morphology of shock-excited emission present in the bipolar lobes of this object. These images reveal the presence ... More

A T-odd Momentum Correlation in Radiative β-DecayFeb 23 2012Feb 07 2013We consider neutron radiative \beta-decay, n\to p e^- \bar{\nu}_e\gamma, and compute the T-odd momentum correlation in the decay rate characterized by the kinematical variable \xi = {\bf l}_\nu \cdot ({\bf l}_e\times{\bf k}) arising from electromagnetic ... More

Hamiltonian circle actions on eight dimensional manifolds with minimal fixed setsAug 27 2014Feb 11 2016Consider a Hamiltonian circle action on a closed $8$-dimensional symplectic manifold $M$ with exactly five fixed points, which is the smallest possible fixed set. In their paper, L. Godinho and S. Sabatini show that if $M$ satisfies an extra "positivity ... More

An Exposition of Götze's Estimation of the Rate of Convergence in the Multivariate Central Limit TheoremMar 22 2010We provide an explanation of the main ideas underlying G\"otze's main result in using Stein's method. We also provide detailed derivations of various intermediate estimates. Curiously, we are led to a different dimensional dependence of the constant than ... More

Representations of some Hopf algebras associated to the symmetric group S_nJan 17 2007Sep 18 2007We study the representations and their Frobenius-Schur indicators of two semisimple Hopf algebras related to the symmetric group $S_n$, namely the bismash products $H_n = k^{C_n}# kS_{n-1}$ and its dual $J_n = k^{S_{n-1}}# kC_n = (H_n)^*,$ where $k$ is ... More

Frobenius-Schur Indicators for Subgroups and the Drinfel'd Double of Weyl GroupsMar 22 2007If G is a finite group and k is a field, there is a natural construction of a Hopf algebra over k associated to G, the Drinfel'd double D(G). We prove that if G is any finite real reflection group with Drinfel'd double D(G) over an algebraically closed ... More

Symmetries in generalized Kähler geometrySep 04 2005We define the notion of a moment map and reduction in both generalized complex geometry and generalized K\"{a}hler geometry. As an application, we give very simple explicit constructions of bi-Hermitian structures on $\C\P^n$, Hirzebruch surfaces, the ... More

Tame Circle ActionsOct 06 2015Sep 07 2017In this paper, we consider Sjamaar's holomorphic slice theorem, the birational equivalence theorem of Guillemin and Sternberg, and a number of important standard constructions that work for Hamiltonian circle actions in both the symplectic category and ... More

A Lower Bound For Depths of Powers of Edge IdealsSep 24 2014May 20 2015Let $G$ be a graph and let $I$ be the edge ideal of $G$. Our main results in this article provide lower bounds for the depth of the first three powers of $I$ in terms of the diameter of $G$. More precisely, we show that $\depth R/I^t \geq \left\lceil{\frac{d-4t+5}{3}} ... More

Global well-posedness for an advection-diffusion equation arising in magneto-geostrophic dynamicsJul 07 2010Feb 04 2011We use De Giorgi techniques to prove H\"older continuity of weak solutions to a class of drift-diffusion equations, with $L^2$ initial data and divergence free drift velocity that lies in $L_{t}^{\infty}BMO_{x}^{-1}$. We apply this result to prove global ... More

Solutions to a class of forced drift-diffusion equations with applications to the magneto-geostrophic equationsMay 18 2017Sep 05 2018We prove the global existence of classical solutions to a class of forced drift-diffusion equations with $L^2$ initial data and divergence free drift velocity $\{u^\nu\}_{\nu_\ge0}\subset L^\infty_t BMO^{-1}_x$, and we obtain strong convergence of solutions ... More

Wellposedness and convergence of solutions to a class of forced non-diffusive equations with applicationsFeb 12 2019Mar 09 2019This paper considers a family of non-diffusive active scalar equations where a viscosity type parameter enters the equations via the constitutive law that relates the drift velocity with the scalar field. The resulting operator is smooth when the viscosity ... More

Geometric algebras on projective surfacesOct 27 2009Jun 17 2010Let X be a projective surface, let \sigma be an automorphism of X, and let L be a \sigma-ample invertible sheaf on X. We study the properties of a family of subrings, parameterized by geometric data, of the twisted homogeneous coordinate ring B(X, L, ... More

Re-Evaluating Small Long-Period Confirmed Planets From KeplerJan 02 2019We re-examine the statistical confirmation of small long-period Kepler planet candidates in light of recent improvements in our understanding of the occurrence of systematic false alarms in this regime. Using the final Data Release 25 (DR25) Kepler planet ... More

Kepler's Earth-like Planets Should Not Be Confirmed Without Independent Detection: The Case of Kepler-452bMar 30 2018We show that the claimed confirmed planet Kepler-452b (a.k.a. K07016.01, KIC 8311864) can not be confirmed using a purely statistical validation approach. Kepler detects many more periodic signals from instrumental effects than it does from transits, ... More

Planetary Candidates Observed by Kepler. VIII. A Fully Automated Catalog With Measured Completeness and Reliability Based on Data Release 25Oct 18 2017Mar 04 2018We present the Kepler Object of Interest (KOI) catalog of transiting exoplanets based on searching four years of Kepler time series photometry (Data Release 25, Q1-Q17). The catalog contains 8054 KOIs of which 4034 are planet candidates with periods between ... More

Three's Company: An additional non-transiting super-Earth in the bright HD 3167 system, and masses for all three planetsJun 06 2017HD 3167 is a bright (V = 8.9), nearby K0 star observed by the NASA K2 mission (EPIC 220383386), hosting two small, short-period transiting planets. Here we present the results of a multi-site, multi-instrument radial velocity campaign to characterize ... More

High Resolution Spectroscopy of the Pulsating White Dwarf G29-38Mar 25 2003We present the analysis of time-resolved, high resolution spectra of the cool white dwarf pulsator, G29-38. From measuring the Doppler shifts of the H-alpha core, we detect velocity changes as large as 16.5 km/s and conclude that they are due to the horizontal ... More

Transit Timing Observations from Kepler: II. Confirmation of Two Multiplanet Systems via a Non-parametric Correlation AnalysisJan 25 2012We present a new method for confirming transiting planets based on the combination of transit timingn variations (TTVs) and dynamical stability. Correlated TTVs provide evidence that the pair of bodies are in the same physical system. Orbital stability ... More

A Thermodynamic Definition of Topological Pressure for Non-Compact SetsJul 14 2008Feb 11 2010We give a new definition of topological pressure for arbitrary (non-compact, non-invariant) Borel subsets of metric spaces. This new quantity is defined via a suitable variational principle, leading to an alternative definition of an equilibrium state. ... More

Discovery and Vetting of Exoplanets I: Benchmarking K2 Vetting ToolsJan 22 2019We have adapted the algorithmic tools developed during the Kepler mission to vet the quality of transit-like signals for use on the K2 mission data. Using the four sets of publicly-available lightcurves on MAST, we produced a uniformly-vetted catalog ... More

Low-temperature triple-alpha rate in a full three-body modelDec 09 2011Aug 02 2012A new full three-body method is introduced to compute the rate of the triple-alpha capture reaction which is the primary source of $^{12}$C in stars. In this work, we combine the Faddeev hyperspherical harmonics and the R-matrix method to obtain a full ... More

Latent protein treesAug 11 2011Dec 05 2013Unbiased, label-free proteomics is becoming a powerful technique for measuring protein expression in almost any biological sample. The output of these measurements after preprocessing is a collection of features and their associated intensities for each ... More

Simultaneous Multiwavelength Observations of Magnetic Activity in Ultracool Dwarfs. IV. The Active, Young Binary NLTT 33370 AB (=2MASS J13142039+1320011)Sep 15 2014Nov 25 2014We present multi-epoch simultaneous radio, optical, H{\alpha}, UV, and X-ray observations of the active, young, low-mass binary NLTT 33370 AB (blended spectral type M7e). This system is remarkable for its extreme levels of magnetic activity: it is the ... More

Transit Timing Observations from Kepler: III. Confirmation of 4 Multiple Planet Systems by a Fourier-Domain Study of Anti-correlated Transit Timing VariationsJan 25 2012We present a method to confirm the planetary nature of objects in systems with multiple transiting exoplanet candidates. This method involves a Fourier-Domain analysis of the deviations in the transit times from a constant period that result from dynamical ... More

Planetary Candidates Observed by Kepler VI: Planet Sample from Q1-Q16 (47 Months)Feb 06 2015\We present the sixth catalog of Kepler candidate planets based on nearly 4 years of high precision photometry. This catalog builds on the legacy of previous catalogs released by the Kepler project and includes 1493 new Kepler Objects of Interest (KOIs) ... More

A sub-Mercury-sized exoplanetMay 24 2013Since the discovery of the first exoplanet we have known that other planetary systems can look quite unlike our own. However, until recently we have only been able to probe the upper range of the planet size distribution. The high precision of the Kepler ... More

Photometric Redshifts and Morphologies of Galaxies in the NICMOS Parallel FieldsDec 07 1999Dec 08 1999We present positions, magnitudes, sizes and morphological classifications for 111 galaxies discovered in the Hubble Space Telescope NICMOS Camera 1 and Camera 2 parallel fields. We combine the magnitudes measured in the JHK-analog filters with those from ... More

The relative abundances of ellipticals and starbursts among the Extremely Red GalaxiesOct 30 2001We present J band observations of a complete sample of 57 red galaxies selected to have K<20 and R-K>5.3. We use the Pozzetti and Mannucci (2000) prescriptions, based on the R-K and J-K colours, to separate the two dominant populations, old ellipticals ... More

Lattice Models of Nonequilibrium Bacterial DynamicsDec 03 2010Feb 23 2011We study a model of self propelled particles exhibiting run and tumble dynamics on lattice. This non-Brownian diffusion is characterised by a random walk with a finite persistence length between changes of direction, and is inspired by the motion of bacteria ... More

Optimal photometry for colour-magnitude diagrams and its application to NGC 2547May 01 2002We have developed the techniques required to use the optimal photometry algorithm of Naylor (1998) to create colour-magnitude diagrams with well defined completeness functions. To achieve this we first demonstrate that the optimal extraction is insensitive ... More

Integrated Silicon Photonics for High-Speed Quantum Key DistributionDec 21 2016Integrated photonics offers great potential for quantum communication devices in terms of complexity, robustness and scalability. Silicon photonics in particular is a leading platform for quantum photonic technologies, with further benefits of miniaturisation, ... More

From Filamentary Networks to Dense Cores in Molecular Clouds: Toward a New Paradigm for Star FormationDec 21 2013Recent studies of the nearest star-forming clouds of the Galaxy at submillimeter wavelengths with the Herschel Space Observatory have provided us with unprecedented images of the initial and boundary conditions of the star formation process. The Herschel ... More

"Hard" crystalline lattice in the Weyl semimetal NbAsOct 29 2015Jan 14 2016We report the effect of hydrostatic pressure on the magnetotransport properties of the Weyl semimetal NbAs. Subtle changes can be seen in the $\rho_{xx}(T)$ profiles with pressure up to 2.31 GPa. The Fermi surfaces undergo an anisotropic evolution under ... More