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A Bayesian approach to the semi-analytic model of galaxy formation: methodology (with Yu Lu, H.J. Mo, and Neal S. Katz), Astronomy Department Faculty Publication Series (2010)
We believe that a wide range of physical processes conspire to shape the observed galaxy...
Computing the Bayes Factor from a Markov chain Monte Carlo Simulation of the Posterior Distribution, Astronomy Department Faculty Publication Series (2010)
Computation of the marginal likelihood from a simulated posterior distribution is central to Bayesian model...
On the algorithms of radiative cooling in semi-analytic models (with Yu Lu, Dusan Keres, Neal Katz, H.J. Mo, and Mark Fardal), Astronomy Department Faculty Publication Series (2010)
We study the behaviour of multiple radiative cooling algorithms implemented in six Semi-Analytic Models (SAMs)...
Beyond the Best-fit Parameter: New Insight on Galaxy Structure Decomposition From GALPHAT (with Ilsang Yoon and Neal S. Katz), Astronomy Department Faculty Publication Series (2009)
We introduce a novel image decomposition package, Galphat, that provides robust estimates of galaxy surface...
Structural Properties of Central Galaxies in Groups and Clusters (with Yicheng Guo, Daniel H. McIntosh, H. J. Mo, Neal Katz, Frank C. van den Bosch, Simone M. Weinmann, Anna Pasquali, and Xiaohu Yang), Astronomy Department Faculty Publication Series (2009)
Using a statistically representative sample of 911 central galaxies (CENs) from the SDSS DR4 Group...
Structural properties of central galaxies in groups and clusters (with YC Guo, DH McIntosh, HJ Mo, N Katz, FC van den Bosch, SM Weinmann, A Pasquali, and XH Yang), Monthly Notices of the Royal Astronomical Society (2009)
Using a statistically representative sample of 911 central galaxies (CENs) from the Sloan Digital Sky...
The dynamics of satellite disruption in cold dark matter haloes (with JH Choi and N Katz), Monthly Notices of the Royal Astronomical Society (2009)
We investigate the physical mechanisms of tidal heating and satellite disruption in cold dark matter...
Globular Cluster Evolution in M87 and Fundamental Plane Ellipticals (with Chigurupati Murali), Astronomy Department Faculty Publication Series (2008)
The globular cluster population in M87 has decreased measurably through dynamical evolution caused by relaxation,...
Bar-driven Dark Halo Evolution: A Resolution of the Cusp-Core Controversy (with Neal Katz), Astronomy Department Faculty Publication Series (2008)
Simulations predict that the dark matter halos of galaxies should have central cusps, while those...
Effect of The Milkyway on Magellanic Cloud Structure, Astronomy Department Faculty Publication Series (2008)
A combination of analytic models and n-body simulations implies that the structural evolution of the...
Noise-driven Evolution in Stellar Systems: A Universal Halo Profile, Astronomy Department Faculty Publication Series (2008)
Using the theory describing the evolution of a galaxy halo due to stochastic fluctuations developed...
Noise-driven Evolution in Stellar Systems: Theory, Astronomy Department Faculty Publication Series (2008)
We present a theory for describing the evolution of a galaxy caused by stochastic events...
The Effect of the Galactic Spheroid on Globular Cluster Evolution (with Chigurupati Murali), Astronomy Department Faculty Publication Series (2008)
We study the combined effects of relaxation, tidal heating and binary heating on globular cluster...
The Warp and Spiral Arms of the Milky Way (with E.S. Levine, Leo Blitz, and Carl Heiles), Astronomy Department Faculty Publication Series (2008)
Time-dependent secular evolution in galaxies, Astronomy Department Faculty Publication Series (2008)
Lynden-Bell & Kalnajs (1972) presented a useful formula for computing the long-range torque between spiral...
The bar-halo interaction - I. From fundamental dynamics to revised N-body requirements (with N Katz), Monthly Notices of the Royal Astronomical Society (2007)
A galaxy remains near equilibrium for most of its history. Only through resonances can non-axisymmetric...
The bar-halo interaction - II. Secular evolution and the religion of N-body simulations (with N Katz), Monthly Notices of the Royal Astronomical Society (2007)
This paper explores resonance-driven secular evolution between a bar and dark matter halo using N-body...
The dynamics of tidal tails from massive satellites (with JH Choi and N Katz), Monthly Notices of the Royal Astronomical Society (2007)
We investigate the dynamical mechanisms responsible for producing tidal tails from dwarf satellites using N-body...
On the origin of cold dark matter halo density profiles (with Y Lu, HJ Mo, and N Katz), Monthly Notices of the Royal Astronomical Society (2006)
N-body simulations predict that cold dark matter (CDM) halo-assembly occurs in two phases: (i) a...
A Magellanic origin for the warp of the Galaxy (with L Blitz), The Astrophysical Journal Letters (2006)
We show that a Magellanic Cloud origin for the warp of the Milky Way can...
Dark matter halo response to the disc growth (with JH Choi, Y Lu, and HJ Mo), The Astrophysical Journal Letters (2006)
We consider the sensitivity of the circular-orbit adiabatic contraction approximation to the baryon condensation rate...
Nature and completeness of galaxies detected in the Two Micron All Sky Survey (with DH McIntosh, EF Bell, and N Katz), Monthly Notices of the Royal Astronomical Society (2006)
The Two Micron All Sky Survey (2MASS) provides the most comprehensive data set of near-infrared...
The cosmological significance of high-velocity cloud complex H (with JD Simon, L Blitz, AA Cole, and M Cohen), The Astrophysical Journal (2006)
We have used new and archival infrared and radio observations to search for a dwarf...
The morphological diversities among star-forming galaxies at high redshifts in the great observatories origins deep survey (with S Ravindranath, M Giavalisco, HC Ferguson, C Conselice, N Katz, J Lotz, M Dickinson, SM Fall, B Mobasher, and C Papovich), The Astrophysical Journal (2006)
We used the deep, multiwavelength images obtained by the Great Observatories Origins Deep Survey (GOODS)...
The Two Micron All Sky Survey (2MASS) (with MF Skrutskie, RM Cutri, R Stiening, S Schneider, JM Carpenter, C Beichman, R Capps, T Chester, J Elias, J Huchra, J Liebert, C Lonsdale, DG Monet, S Price, P Seitzer, T Jarrett, JD Kirkpatrick, JE Gizis, E Howard, T Evans, J Fowler, L Fullmer, R Hurt, R Light, EL Kopan, KA Marsh, HL McCallon, R Tam, S Van Dyk, and S Wheelock), The Astronomical Journal (2006)
Between 1997 June and 2001 February the Two Micron All Sky Survey (2MASS) collected 25.4...
Bar-induced evolution of dark matter cusps (with K Holley-Bockelmann and N Katz), Monthly Notices of the Royal Astronomical Society (2005)
The evolution of a stellar bar transforms not only the galactic disc, but also the...
Large scale structure in the two micron all sky survey (with AH Maller, DH McIntosh, and N Katz), Multiwavelength Mapping of Galaxy Formation and Evolution, ESO Astrophysics Symposia (2005)
The unprecedented sky coverage and photometric uniformity of the Two Micron All Sky Survey (2MASS)...
The galaxy angular correlation functions and power spectrum from the Two Micron All Sky Survey (with AH Maller, DH McIntosh, and N Katz), The Astrophysical Journal (2005)
We calculate the angular correlation function of galaxies in the Two Micron All Sky Survey....
A Two Micron All Sky Survey view of the Sagittarius dwarf galaxy. II. Swope telescope spectroscopy of M giant stars in the dynamically cold Sagittarius tidal stream (with SR Majewski, WE Kunkel, DR Law, RJ Patterson, AA Polak, HJ Rocha-Pinto, JD Crane, PM Frinchaboy, CB Hummels, KV Johnston, J Rhee, and MF Skrutskie), The Astronomical Journal (2004)
We have obtained moderate resolution (~6 km s-1) spectroscopy of several hundred M giant candidates...
Dark Matter Constraints from the Sagittarius Dwarf and Tail System (with Steven R. Majewski, David R. Law, Kathryn V. Johnston, and Michael F. Skrutskie), Astronomy Department Faculty Publication Series (2004)
2MASS has provided a three-dimensional map of the >360 degree, wrapped tidal tails of the...
Finding the Milky Way in 2MASS, Milky Way Surveys: The Structure and Evolution of our Galaxy, Proceedings of ASP Conference (2004)
A first estimate of the baryonic mass function of galaxies (with EF Bell, DH McIntosh, and N Katz), The Astrophysical Journal (2003)
We estimate the baryonic (stellar+cold gas) mass function of galaxies in the local universe by...
A Two Micron All Sky Survey view of the Sagittarius dwarf galaxy. I. Morphology of the Sagittarius core and tidal arms (with SR Majewski, MF Skrutskie, and JC Ostheimer), The Astrophysical Journal (2003)
We present the first all-sky view of the Sagittarius (Sgr) dwarf galaxy mapped by M-giant...
Investigating the long-term evolution of galaxies: Noise, cuspy halos and bars, Astrophysical Supercomputing using Particle Simulations, IAU Symposium (2003)
I review the arguments for the importance of halo structure in driving galaxy evolution and...
Structure of bright 2MASS galaxies: 2D fits to the K-S-band surface brightness profiles (with DH McIntosh, AH Maller, and N Katz), Galaxy Evolution: Theory & Observations (2003)
The unprecedented sky coverage and photometric uniformity of the Two Micron All Sky Survey (2MASS)...
The clustering dipole of the local universe from the Two Micron All Sky Survey (with AH Maller, DH McIntosh, and N Katz), The Astrophysical Journal Letters (2003)
The unprecedented sky coverage and photometric uniformity of the Two Micron All Sky Survey (2MASS)...
The optical and near-infrared properties of galaxies. I. Luminosity and stellar mass functions (with EF Bell, DH McIntosh, and N Katz), The Astrophysical Journal Supplement Series (2003)
We use a large sample of galaxies from the Two Micron All Sky Survey (2MASS)...
An upper limit to the age of the galactic bar (with AA Cole), The Astrophysical Journal (2002)
Using data from the Two Micron All Sky Survey, we identify a population of infrared...
Bar-driven dark halo evolution: A resolution of the cusp-core controversy (with N Katz), The Astrophysical Journal (2002)
Simulations predict that the dark matter halos of galaxies should have central cusps, while those...
The 2MASS CMD of the Milky Way: Inferring structure and history (with AA Cole), Observed HR Diagrams and Stellar Evolution, ASP Conference Proceedings (2002)
Investigating the Long-term Evolution of Galaxies: Noise, Cuspy Halos and Bars, Astronomy Department Faculty Publication Series (2001)
I review the arguments for the importance of halo structure in driving galaxy evolution and...
Evolution of galaxies due to self-excitation, The restless universe. Proceedings of the Fifty-fourth Scottish Universities Summer School in Physics (2001)
These lectures will cover methods for studying the evolution of galaxies since their formation. Because...
Noise-driven evolution in stellar systems - II. A universal halo profile, Monthly Notices of the Royal Astronomical Society (2001)
Disc instabilities such as arm and bar formation, minor mergers and tidal encounters drive a...
Noise-driven evolution in stellar systems - I. Theory, Monthly Notices of the Royal Astronomical Society (2001)
We present a theory for describing the evolution of a galaxy caused by stochastic events...
Perturbation of dark halos and elliptical galaxies during flyby encounters (with E Vesperini), Galaxy Disks and Disk Galaxies (2001)
We study the structure produced in dark halos and in elliptical galaxies during an unbound...
Structure of the Large Magellanic Cloud from 2MASS (with S Nikolaev), The Astrophysical Journal (2001)
We derive structural parameters and evidence for extended tidal debris from star count and preliminary...
The Milky Way as a key to structural evolution in galaxies, Tetons 4: Galactic Structure, Stars and the Interstellar Medium, ASP Conference Series (2001)
Much of our effort in understanding the long-term evolution and morphology of theMilkyWay and other...
Stellar Populations in the Large Magellanic Cloud from 2MASS (with Sergei Nikolaev), Astronomy Department Faculty Publication Series (2000)
We present a morphological analysis of the feature-rich 2MASS LMC colormagnitude diagram, identifying Galactic and...
A Global Photometric Analysis of 2MASS Calibration Data (with Sergei Nikolaev, Michael F. Skrutskie, Roc M. Cutri, Sherry L. Wheelock, John E. Gizis, and Eric M. Howard), Astronomy Department Faculty Publication Series (2000)
We present results from the application of a global photometric calibration (GPC) procedure to calibration...
A global photometric analysis of 2MASS calibration data (with S Nikolaev, MF Skrutskie, RM Cutri, SL Wheelock, JE Gizis, and EM Howard), The Astronomical Journal (2000)
We present results from the application of a global photometric calibration (GPC) procedure to calibration...
Effect of the Milky Way on magellanic cloud structure, The Astrophysical Journal (2000)
A combination of analytic models and n-body simulations implies that the structural evolution of the...
Perturbations of spherical stellar systems during flyby encounters (with E Vesperini), The Astrophysical Journal (2000)
We study the internal response of a galaxy to an unbound encounter and present a...
Stellar populations in the large Magellanic Cloud from 2MASS (with S Nikolaev), The Astrophysical Journal (2000)
We present a morphological analysis of the feature-rich 2MASS LMC color-magnitude diagram, identifying Galactic and...
Perturbations of Spherical Stellar Systems During Fly-by Encounters (with E. Vesperini), Astronomy Department Faculty Publication Series (1999)
We study the internal response of a galaxy to an unbound encounter and present a...
An adaptive algorithm for N-body field expansions, The Astronomical Journal (1999)
An expansion of a density field or particle distribution in basis functions that solve the...
Effect of the Magellanic Clouds on the Milky Way disk and VICE VERSA, Astronomy Department Faculty Publication Series (1999)
We introduce a new galaxy image decomposition tool, GALPHAT (GALaxy PHotometric ATtributes), to provide full...
Effect of the Magellanic Clouds on the Milky Way Disk and VICE VERSA, Astronomy Department Faculty Publication Series (1998)
The satellite-disk interaction provides limits on halo properties in two ways: (1) physical arguments motivate...
Dynamics of an interacting luminous disc, dark halo and satellite companion, Monthly Notices of the Royal Astronomical Society (1998)
This paper describes a method, based on linear perturbation theory, to determine the dynamical interaction...
Fluctuations in finite-N equilibrium stellar systems, Monthly Notices of the Royal Astronomical Society (1998)
Gravitational amplification of Poisson noise in stellar systems is important on large scales. For example,...
New insight on galaxy structure from GALPHAT I. Motivation, methodology, and benchmarks for Sersic models (with Ilsang Yoon), Astronomy Department Faculty Publication Series (1998)
We introduce a new galaxy image decomposition tool, GALPHAT (GALaxy PHotometric ATtributes), to provide full...
Fluctuations in Finite N Equilibrium Stellar Systems, Astronomy Department Faculty Publication Series (1997)
Gravitational amplification of Poisson noise in stellar systems is important on large scales. For example,...
Dynamics of an Interacting Luminous Disk, Dark Halo, and Satellite Companion, Astronomy Department Faculty Publication Series (1997)
This paper describes a method for determining the dynamical interaction between extended halo and spheroid...
A rigorous reanalysis of the IRAS variable population: Scale lengths, asymmetries, and microlensing (with S Nikolaev), Astrophysical Journal (1997)
Previous work reported a bar signature in color-selected IRAS variable stars. Here, we estimate the...
Evolution of the galactic globular cluster system (with C Murali), Royal Astronomical Society, Monthly Notices (1997)
We study the dynamical evolution of disk and halo globular clusters in the Milky Way...
Globular cluster evolution in M87 and fundamental plane ellipticals (with C Murali), Monthly Notices of the Royal Astronomical Society (1997)
The globular cluster population in M87 has decreased measurably through dynamical evolution caused by relaxation,...
The effect of the Galactic spheroid on globular cluster evolution (with C Murali), Monthly Notices of the Royal Astronomical Society (1997)
We study the combined effects of relaxation, tidal heating and binary heating on globular cluster...
The fate of cannibalized fundamental-plane elliptical galaxies, The Astrophysical Journal (1997)
Evolution and disruption of galaxies orbiting in the gravitational field of a larger cluster galaxy...
The Fate of Cannibalized Fundamental-plane Ellipticals, Astronomy Department Faculty Publication Series (1996)
Evolution and disruption of galaxies orbiting in the gravitational field of a larger cluster galaxy...
High-accuracy minimum relaxation N-body simulations using orthogonal series force computation, Astrophysical Journal (1996)
This report describes a modification of orthogonal function Poisson solver for n body simulations that...
The shape of the disk: Clues from the kinematics of disk stars (with P Schechter, J Binney, and T deZeeuw), Proceedings of the 169th Symposium of the International Astronomical Union (1996)
Production of Milky-way structure by the magellanic-clouds, Astrophysical Journal Letters (1995)
Previous attempts at disturbing the galactic disk by the Magellanic Clouds relied on direct tidal...
Adiabatic invariants in stellar dynamics .1. Basic concepts, The Astronomical Journal (1994)
The adiabatic criterion, widely used in astronomical dynamics, is based on the harmonic oscillator. It...
Adiabatic InvAriants in stellar dynamics .2. gravitational shocking, The Astronomical Journal (1994)
A new theory of gravitational shocking based on time-dependent perturbation theory shows that the changes...
Adiabatic Invariants in Stellar Dynamics .3. Application to Globular-Cluster Evolution, The Astronomical Journal (1994)
The previous two companion papers demonstrate that slowly varying perturbations do not result in adiabatic...
Kinematic signature of a rotating bar near a resonance, The Astrophysical Journal (1994)
There have been several recent suggestions that the Milky Way has rotating bar-like features based...
The 2-Micron all-sky survey - survey rationale and initial testing (with SG KLEINMANN, M.G. Lysaght, W.L. Pughe, S.E. Schneider, M.F. Skuryskie, S.D. Price, K. Matthews, B.T. Sofier, J.P. Huchra, C.A. Beichman, T.J. Chester, T. Jarrett, G.L. Kopan, C.J. Lonsdale, J. Elias, J.W. Liebert, and P. Seitzer), Astronomy Department Faculty Publication Series (1994)
Weakly damped modes in star-clusters and galaxies, Astrophysical Journal (1994)
A perturber may excite a coherent mode in a star cluster or galaxy. If the...
Iras variables as galatic structure tracers-classification of the bright variables (with L.E. Allen and S.G. Klainmann), Astrophysical Journal (1993)
The characteristics of the 'bright infrared variables' (BIRVs), a sample consisting of the 300 brightest...
Nonlocal and collective relaxation in stellar-systems, Astrophysical Journal (1993)
The modal response of stellar systems to fluctuations at large scales is presently investigated by...
Bar-spheroid interaction in galaxies (with L HERNQUIST), Astrophysical Journal (1992)
N-body simulation and linear analysis is employed to investigate the secular evolution of barred galaxies,...
Binaries in globular-clusters (with P. HUT, S. McMillian, J. Goodman, M. Mateo, E.S. Phinny, C. Pryor, H.B. Richer, and F. Verbunt), Astronomical Society of the Pacific, Publications (1992)
Recent observations have shown that globular clusters contain a substantial number of binaries most of...
Constraints on the galatic bulge using iras variable point sources, Astrophysical Journal (1992)
A flux-limited sample of IRAS variable sources is used to probe the 3D structure of...
Detection of a large-scale stellar bar in the milky-way, Astrophysical Journal (1992)
This paper explores the structure of the stellar disk inside the solar circle using AGB...
Wide binaries in the woolley catalog (with I Wasserman), Astrophysical Journal (1991)
Constraints on the properties of local dark matter are investigated on the basis of the...
Vertical oscillation of the galatic disk, Astrophysical Journal (1991)
The possible oscillation modes of the local structure of the Galactic disk and their frequencies...
Limits on cluster Binaries (with RW ROMANI), Astrophysical Journal (1991)
An unresolved binary system will be systematically brighter and redder than the primary component alone....