| Refcode | Title | |
| 2001ApJ...546..216C | Hubble Space Telescope Optical-Near-Infrared Colors of Nearby R1/4 and Exponential Bulges | |
| 2001ApJ...546..734L | A High Intrinsic Peculiarity Rate among Type IA Supernovae | |
| 2001ApJ...546..744N | The Narrow-Line Region of Seyfert Galaxies: Narrow-Line Seyfert 1 Galaxies versus Broad-Line Seyfert 1 Galaxies | |
| 2001ApJ...546..759Y | Physical Diagnostics from a Narrow Fe Kα Emission Line Detected by Chandra in the Seyfert 1 Galaxy NGC 5548 | |
| 2001ApJ...546..795G | Heavy X-Ray Absorption in Soft X-Ray-weak Active Galactic Nuclei | |
| 2001ApJ...546..805B | The Multiphase Nature of the Intracluster Medium of Some Clusters of Galaxies | |
| 2001ApJ...546..845G | The Nuclear and Circumnuclear Stellar Population in Seyfert 2 Galaxies: Implications for the Starburst-Active Galactic Nucleus Connection | |
| 2001ApJ...546..866B | Ionization, Extinction, and Spiral Structure in the Inner Disk of NGC 1068 | |
| 2001ApJ...546..877C | Four Years of Extreme Ultraviolet Observations of Markarian 421. I. Spectral Analysis | |
| 2001ApJ...546..886C | Four Years of Extreme Ultraviolet Observations of Markarian 421. II. Temporal Analysis | |
| 2001ApJ...546..916W | The Disk and Dark Halo Mass of the Barred Galaxy NGC 4123. I. Observations | |
| 2001ApJ...546L..91K | Detection of X-Ray Emission from Galaxies inside the Bootes Void | |
| 2001ApJ...547..124F | Near-Infrared Imaging of the Host Galaxies of Three Radio-loud Quasars at z~1.5 | |
| 2001ApJ...547..129Q | The Multitude of Unresolved Continuum Sources at 1.6 Microns in Hubble Space Telescope Images of Seyfert Galaxies | |
| 2001ApJ...547..154B | Emission Mechanisms in X-Ray-faint Galaxies | |
| 2001ApJ...547..406L | Analysis of Type IIn SN 1998S: Effects of Circumstellar Interaction on Observed Spectra | |
| 2001ApJ...547..521T | Superclustering of Faint Galaxies in the Field of a QSO Concentration at z~1.1 | |
| 2001ApJ...547..649P | Estimation of Relativistic Accretion Disk Parameters From Iron Line Emission | |
| 2001ApJ...547..667K | Ultraviolet Spectropolarimetry of Narrow-Line Radio Galaxies | |
| 2001ApJ...547..684M | An RXTE Survey of Long-Term X-Ray Variability in Seyfert 1 Galaxies | |
| 2001ApJ...547..705D | Velocity Gradients in the Intracluster Gas of the Perseus Cluster | |
| 2001ApJ...548...79G | Evolution of the Internal Dynamics of Galaxy Clusters | |
| 2001ApJ...548..172G | Molecular Gas and the Modest Star Formation Efficiency in the ``Antennae'' Galaxies: Arp 244=NGC 4038/9 | |
| 2001ApJ...548..550N | The Beta Problem: A Study of Abell 262 | |
| 2001ApJ...548..564W | A Determination of the Hubble Constant from Cepheid Distances and a Model of the Local Peculiar Velocity Field | |
| 2001ApJ...548..585S | The Low-Redshift Quasar-Quasar Correlation Function from an Extragalactic Hα Emission-Line Survey to z=0.4 | |
| 2001ApJ...548..624C | Chandra Study of an Overdensity of X-Ray Sources around Two Distant (Z~0.5) Clusters | |
| 2001ApJ...548..681B | A Comparison of Ultraviolet Imaging Telescope Far-Ultraviolet and Hα Star Formation Rates | |
| 2001ApJ...548L..73H | Evidence for the Heating of Atomic Interstellar Gas by Polycyclic Aromatic Hydrocarbons | |
| 2001ApJ...549..155N | Where is the[O III] λ4363 Emitting Region in Active Galactic Nuclei? | |
| 2001ApJ...549..172T | The Galaxy Populations of X-Ray-detected, Poor Groups | |
| 2001ApJ...549..215D | The Infrared Spectral Energy Distribution of Normal Star-forming Galaxies | |
| 2001ApJ...549..802A | A Possible Relationship between Quasars and Clusters of Galaxies | |
| 2001ApJ...549..840H | Parsec-Scale Blazar Monitoring: Proper Motions | |
| 2001ApJ...549..906M | A Gamma-Ray Flare of Quasar CTA 26 | |
| 2001ApJ...549L.191M | CO Detections of Edge-on Low Surface Brightness Galaxies | |
| 2001ApJ...550..204I | Star-forming Objects in the Tidal Tails of Compact Groups | |
| 2001ApJ...550..212B | Stellar Mass-to-Light Ratios and the Tully-Fisher Relation | |
| 2001ApJ...550..230L | The Seyfert-Starburst Connection in X-Rays. II. Results and Implications | |
| 2001ApJ...550..253A | Detection of a Corrugated Velocity Pattern in the Spiral Galaxy NGC 5427 | |
| 2001ApJ...550..593J | The Taurus Tunable Filter Field Galaxy Survey: Sample Selection and Narrowband Number Counts | |
| 2001ApJ...550L..25D | Far Ultraviolet Spectroscopic Explorer Limits on Far-Ultraviolet Emission from Warm Gas in Clusters of Galaxies | |
| 2001ApJ...550L..35B | Possible Local Spiral Galaxy Counterparts to Compact Blue Galaxies at Intermediate Redshift | |
| 2001ApJ...550L.147Z | Time-Variable Faraday Rotation Measures of 3C 273 and 3C 279 | |
| 2001ApJ...551...57C | Ionization Sources and Physical Conditions in the Diffuse Ionized Gas Halos of Four Edge-On Galaxies | |
| 2001ApJ...551..172P | Multiwavelength Study of the Quasar PKS 0528+134 | |
| 2001ApJ...551..277M | The DIRTY Model. II. Self-consistent Treatment of Dust Heating and Emission in a Three-dimensional Radiative Transfer Code | |
| 2001ApJ...551..651H | Arp 119: A High-Speed Galaxy Collision With Episodic Star Formation | |
| 2001ApJ...551..702H | Radio Continuum Imaging of the Spiral Galaxy NGC 4258 | |
| 2001ApJ...551..730E | Arp 220: A Circumnuclear Polar Ring as an Alternative to a Double Nucleus? | |
| 2001ApJ...551L.135D | The Stellar Content of NGC 6789, A Blue Compact Dwarf Galaxy in the Local Void | |
| 2001ApJ...552..508G | VLBI Observations of a Complete Sample of Radio Galaxies: 10 Years Later | |
| 2001ApJ...553...47F | Final Results from the Hubble Space Telescope Key Project to Measure the Hubble Constant | |
| 2001ApJ...553..668E | MACS: A Quest for the Most Massive Galaxy Clusters in the Universe | |
| 2001ApJ...553..677L | On the Linearity of the Black Hole-Bulge Mass Relation in Active and in Nearby Galaxies | |
| 2001ApJ...553..861L | Is It Round? Spectropolarimetry of the Type II-p Supernova 1999EM | |
| 2001ApJ...553L..23W | The Inner Light-Year of the Nearest Seyfert 1 Nucleus in NGC 4395 | |
| 2001ApJ...553L.101G | The Absorbers toward CSO 118: Superclustering at Z~3, or an Intrinsic Absorption Complex? | |
| 2001ApJ...553L.115M | The North Ecliptic Pole Supercluster | |
| 2001ApJ...553L.125B | The Detection of a Cooling Flow Elliptical Galaxy from O VI Emission | |
| 2001ApJ...554...18A | The European Large-Area Infrared Space Observatory Survey V: A BeppoSAX Hard X-Ray Survey of the S1 Region | |
| 2001ApJ...554..202I | ROSAT X-Ray Observations of the Spiral Galaxy M81 | |
| 2001ApJ...554..233W | A Rapid X-Ray Flare in the Radio-loud Narrow-Line Quasar PKS 0558-504 | |
| 2001ApJ...554..240E | NGC 3065: A Certified LINER with Broad, Variable Balmer Lines | |
| 2001ApJ...554..803Y | Radio Properties of Infrared-selected Galaxies in the IRAS 2 Jy Sample | |
| 2001ApJ...554..881S | Weak-Lensing Measurements of 42 SDSS/RASS Galaxy Clusters | |
| 2001ApJ...554..964L | The Pearson-Readhead Survey of Compact Extragalactic Radio Sources from Space. II. Analysis of Source Properties | |
| 2001ApJ...554.1012S | The Host Galaxy and Environment of the z=1.195 Quasar 3C 190 | |
| 2001ApJ...554L..29G | Infrared Emission from the Radio Supernebula in NGC 5253: A Proto-Globular Cluster? | |
| 2001ApJ...554L.129M | The LX-σ Relation for Galaxies and Clusters of Galaxies | |
| 2001ApJ...554L.147P | Evidence for a Circumnuclear Disk in 1946+708 | |
| 2001ApJ...554L.193H | The Progenitors of Subluminous Type Ia Supernovae | |
| 2001ApJ...555...12D | EGRET Observations of Monoceros: Diffuse Gamma-Ray Emission in the Outer Galaxy | |
| 2001ApJ...555..191F | Temperature and Heavy-Element Abundance Profiles of Cool Clusters of Galaxies from ASCA | |
| 2001ApJ...555..232R | HIPASS Detection of an Intergalactic Gas Cloud in the NGC 2442 Group | |
| 2001ApJ...555..280S | Observation of the Halo of NGC 3077 near the ``Garland'' Region Using the Hubble Space Telescope | |
| 2001ApJ...555..301M | Star Formation Thresholds in Galactic Disks | |
| 2001ApJ...555..558R | X-Ray-emitting Groups in the Infall Region of Abell 2199 | |
| 2001ApJ...555..625C | A 250 GHz Survey of High-Redshift Quasars from the Sloan Digital Sky Survey | |
| 2001ApJ...555..650H | Nuclear Luminosities and Radio Loudness of Seyfert Nuclei | |
| 2001ApJ...555..663S | Testing the Unified Model with an Infrared-selected Sample of Seyfert Galaxies | |
| 2001ApJ...555..709L | ROSAT Observations of 3C 388: A Test of Minimum Energy | |
| 2001ApJ...555..719C | Quasi-Stellar Objects, Ultraluminous Infrared Galaxies, and Mergers | |
| 2001ApJ...555..758W | WIYN Integral Field Unit Study of the Kinematics of the Ionized Gas in NGC 4214 | |
| 2001ApJ...555..900P | The Metamorphosis of SN 1998bw | |
| 2001ApJ...555L..21L | Chandra Limits on X-Ray Emission Associated with the Supermassive Black Holes in Three Giant Elliptical Galaxies | |
| 2001ApJ...556...24Z | The Cores of Local Group Galaxies at X-Rays | |
| 2001ApJ...556..113H | Parsec-Scale Circular Polarization Observations of 40 Blazars | |
| 2001ApJ...556..150F | The BeppoSAX View of the X-Ray Active Nucleus of NGC 4258 | |
| 2001ApJ...556..177G | A Morphological Type Dependence in the μ0-log h Plane of Spiral Galaxy Disks | |
| 2001ApJ...556..302H | Evidence for Asphericity in a Subluminous Type Ia Supernova: Spectropolarimetry of SN 1999by | |
| 2001ApJ...556..653C | Multicolor Optical Imaging of Infrared-Warm Seyfert Galaxies. III. Surface Photometry: Light Profile Decomposition | |
| 2001ApJ...556..676C | Multicolor Optical Imaging of Infrared-Warm Seyfert Galaxies. IV. Surface Photometry: Color Distributions | |
| 2001ApJ...556L..25S | Chandra Observations of SN 1999gi and the X-Ray Emission of Type II-P Supernovae | |
| 2001ApJ...556L..29S | An Upper Mass Limit for the Progenitor of the Type II-P Supernova SN 1999gi | |
| 2001ApJ...557...54L | The Obscuring Starburst of NGC 6221 and Implications for the Hard X-Ray Background | |
| 2001ApJ...557..150N | The Spatial Distribution and Kinematics of Stellar Populations in E+A Galaxies | |
| 2001ApJ...557..578F | WFPC2 Imaging of Quasar Environments: A Comparison of Large Bright Quasar Survey and Hubble Space Telescope Archive Quasars | |
| 2001ApJ...557..646C | High-Latitude H I in NGC 2613: Structure and Dynamics | |
| 2001ApJ...557..659M | Very Large Array Observations of the H92α Line from NGC 5253 and Henize 2-10: Ionized Gas around Super Star Clusters | |
| 2001ApJ...557L..89W | Discovery of a Galaxy Cluster via Weak Lensing | |
| 2001ApJ...558...81C | Empirical Diagnostics of the Starburst-AGN Connection | |
| 2001ApJ...558..561U | Statistical Properties of Radio Emission from the Palomar Seyfert Galaxies | |
| 2001ApJ...558..615H | The Distance to SN 1999em from the Expanding Photosphere Method | |
| 2001ApJ...558L..93I | Strong Evidence for a Buried Active Galactic Nucleus in UGC 5101: Implications for LINER-type Ultraluminous Infrared Galaxies | |
| 2001ApJ...559..147S | Circumnuclear Stellar Population, Morphology, and Environment of Seyfert 2 Galaxies: An Evolutionary Scenario | |
| 2001ApJ...559..167G | X-Ray Emission from the Nucleus of the Dwarf Elliptical Galaxy NGC 3226 | |
| 2001ApJ...559..201M | Age Dating Ultraluminous Infrared Galaxies along the Merger Sequence | |
| 2001ApJ...559..243M | The Discovery of Cepheids and a New Distance to NGC 2841 Using the Hubble Space Telescope | |
| 2001ApJ...559..703T | Very Long Baseline Array Polarimetry of Three Powerful Radio Galaxy Cores | |
| 2001ApJ...559..828C | Dynamics of the Globular Cluster System Associated with M87 (NGC 4486). II. Analysis | |
| 2001ApJ...559L.139S | The Continuing Radio Evolution of SN 1970G | |
| 2001ApJ...560...86C | 1WGA J1226.9+3332: A High-Redshift Cluster Discovered by Chandra | |
| 2001ApJ...560..110W | H I Gas in the Environment of the Seyfert Galaxies NGC 6764 and Markarian 1126 | |
| 2001ApJ...560..168M | Nuclear Gasdynamics in Arp 220: Subkiloparsec-Scale Atomic Hydrogen Disks | |
| 2001ApJ...560..566K | The K-Band Galaxy Luminosity Function | |
| 2001ApJ...560..907M | Interferometric Astrometry with Hubble Space Telescope Fine Guidance Sensor 3: The Parallax of the Cataclysmic Variable TV Columbae | |
| 2001ApJ...560L.127B | A Blind H I Survey of the M81 Group | |
| 2001ApJ...561..146C | Multiwavelength Monitoring of the Narrow-Line Seyfert 1 Galaxy Arakelian 564. II. Ultraviolet Continuum and Emission-Line Variability | |
| 2001ApJ...561..218R | The BIMA Survey of Nearby Galaxies. I. The Radial Distribution of CO Emission in Spiral Galaxies | |
| 2001ApJ...561..645M | Broad Absorption Line Quasars in the Sloan Digital Sky Survey with VLA FIRST Radio Detections | |
| 2001ApJ...561..766M | Far-Infrared Spectroscopy of Normal Galaxies: Physical Conditions in the Interstellar Medium | |
| 2001ApJ...561L..41R | Infrared Mass-to-Light Profile throughout the Infall Region of the Coma Cluster | |
| 2001ApJ...561L..69I | BeppoSAX Observation of NGC 3079 | |
| 2001ApJ...561L.107I | X-Ray Detection of Presupernova Evolution for the SN 1993J Progenitor | |
| 2001ApJ...562..124J | Chandra X-Ray Observatory Observation of the High-Redshift Cluster MS 1054-0321 | |
| 2001ApJ...562..133B | Chandra Detection of X-Ray Absorption Associated with a Damped Lyα System | |
| 2001ApJ...562..139M | Hubble Space Telescope Observations of the CfA Seyfert 2 Galaxies: Near-Infrared Surface Photometry and Nuclear Bars | |
| 2001ApJ...562..164K | Probing for Dark Matter within Spiral Galaxy Disks | |
| 2001ApJ...562..179X | Models for Multiband Infrared Surveys | |
| 2001ApJ...562..208L | Parsec-Scale Jet Polarization Properties of a Complete Sample of Active Galactic Nuclei at 43 GHz | |
| 2001ApJ...562..254D | Merging Binary Clusters | |
| 2001ApJ...562..266D | Detection of Bulk Motions in the Intracluster Medium of the Centaurus Cluster | |
| 2001ApJ...562..679B | Globular Cluster Population of Hickson Compact Group 22a and 90c | |
| 2001ApJ...562..689P | A Photometric and Spectroscopic Study of Dwarf and Giant Galaxies in the Coma Cluster. III. Spectral Ages and Metallicities | |
| 2001ApJ...562..713M | The Star Formation History of LGS 3 | |
| 2001ApJ...562L..29C | On the Nature of Intrinsic Absorption in Reddened Seyfert 1 Galaxies | |
| 2001ApJ...562L.133U | The Origin of Radio Emission in Low-Luminosity Active Galactic Nuclei: Jets, Accretion Flows, or Both? | |
| 2001ApJ...563..673T | A Filament between Galaxy Clusters A3391 and A3395 | |
| 2001ApJ...563..687G | High-Resolution Mid-Infrared Images of the Nucleus of M81 | |
| 2001ApJ...563L..11G | A Correlation between Galaxy Light Concentration and Supermassive Black Hole Mass | |
| 2001ApJS..132...19S | Strömgren Photometry from z=0 to z~1. I. The Method | |
| 2001ApJS..132...37K | Optical Classification of Southern Warm Infrared Galaxies | |
| 2001ApJS..132..129M | An Ultraviolet/Optical Atlas of Bright Galaxies | |
| 2001ApJS..132..199S | Jet Directions in Seyfert Galaxies: Radio Continuum Imaging Data | |
| 2001ApJS..133....1U | The ASCA Medium Sensitivity Survey (the GIS Catalog Project): Source Catalog | |
| 2001ApJS..133...77H | Radio Continuum Survey of an Optically Selected Sample of Nearby Seyfert Galaxies | |
| 2001ApJS..133..269L | The Seyfert-Starburst Connection in X-Rays. I. The Data | |
| 2001ApJS..133..321C | Multiband Analysis of a Sample of Blue Compact Dwarf Galaxies. I. Surface Brightness Distribution, Morphology, and Structural Parameters | |
| 2001ApJS..134...53F | The Z=0 Galaxy Luminosity Function. I. Techniques for Identification of Dwarf Galaxies at ~10 MPC | |
| 2001ApJS..134..181J | Multiepoch Very Long Baseline Array Observations of EGRET-detected Quasars and BL Lacertae Objects: Superluminal Motion of Gamma-Ray Bright Blazars | |
| 2001ApJS..134..355M | The Radio Galaxy Populations of Nearby Northern Abell Clusters | |
| 2001ApJS..135...41F | On the Compared Accuracy and Reliability of Spectroscopic and Photometric Redshift Measurements | |
| 2001ApJS..135..125K | An Atlas of Hα and R Images and Radial Profiles of 63 Bright Virgo Cluster Spiral Galaxies | |
| 2001ApJS..135..155M | A Quantitative Evaluation of Potential Radio Identifications for 3EG EGRET Sources | |
| 2001ApJS..135..177G | A Comparison of Tracers of Cool Gas in Galaxies and the 12CO/13CO Luminosity Ratio in Luminous Infrared Galaxies | |
| 2001ApJS..135..227B | The FIRST Bright Quasar Survey. III. The South Galactic Cap | |
| 2001ApJS..136...61S | Integral Field Near-Infrared Spectroscopy of a Sample of Seyfert and LINER Galaxies. I. The Data | |
| 2001ApJS..136..393C | Multiband Analysis of a Sample of Blue Compact Dwarf Galaxies. II. Spatially Resolved and Integrated Photometry | |
| 2001ApJS..137..117G | The Las Campanas Distant Cluster Survey: The Catalog | |
| 2001ApJS..137..139S | A Multivariate Statistical Analysis of Spiral Galaxy Luminosities. I. Data and Results | |
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