| Refcode | Title | |
| 2004ApJ...600..115P | The Parsec-Scale Structure and Jet Motions of the TeV Blazars 1ES 1959+650, PKS 2155-304, and 1ES 2344+514 | |
| 2004ApJ...600..141Y | Large-Field Multicolor Study of A168: Subclusters, Dynamics, and Luminosity Functions | |
| 2004ApJ...600..188M | Star Formation History and Extinction in the Central Kiloparsec of M82-like Starbursts | |
| 2004ApJ...600..613S | The H II Regions of the Damped Lyα Absorber SBS 1543+593 | |
| 2004ApJ...600..626S | Two Active Nuclei in 3C 294 | |
| 2004ApJ...600..695R | Radio and Far-Infrared Emission as Tracers of Star Formation and Active Galactic Nuclei in Nearby Cluster Galaxies | |
| 2004ApJ...600L..27B | X-Ray Emission from the Quasar PKS 1127-145: Comptonized Infrared Photons on Parsec Scales | |
| 2004ApJ...600L..31S | Multiwavelength Scaling Relations for Nuclei of Seyfert Galaxies | |
| 2004ApJ...600L.147H | Lower Mass Black Holes in the Great Observatories Origins Deep Survey? Off-nuclear X-Ray Sources | |
| 2004ApJ...601..142C | Stacking Searches for Gamma-Ray Emission above 100 MeV from Radio and Seyfert Galaxies | |
| 2004ApJ...601..676V | Early Growth and Efficient Accretion of Massive Black Holes at High Redshift | |
| 2004ApJ...601..723Y | Multiwavelength Observations of the Gas-rich Host Galaxy of PDS 456: A New Challenge for the ULIRG-to-QSO Transition Scenario | |
| 2004ApJ...601..735T | The Luminous X-Ray Source Population in M51 Observed with Chandra | |
| 2004ApJ...601..798C | Soft X-Ray Absorption Due to a Foreground Edge-on Spiral Galaxy toward the Core of A2029 | |
| 2004ApJ...601..805U | The Hα Luminosity Function of the Galaxy Cluster A521 at z = 0.25 | |
| 2004ApJ...601..813D | Near-Infrared Integral Field Spectroscopy of Star-forming Galaxies | |
| 2004ApJ...602..103F | Black Hole Masses and Doppler Factors of Gamma-Ray Active Galactic Nuclei | |
| 2004ApJ...602..123M | Breaking All the Rules: The Compact Symmetric Object 0402+379 | |
| 2004ApJ...602..135L | Accretion and Outflow in the Active Galactic Nucleus and Starburst of NGC 5135 | |
| 2004ApJ...602..231C | Old and Young X-Ray Point Source Populations in Nearby Galaxies | |
| 2004ApJ...602..635R | The Spectral Energy Distribution and Emission-Line Properties of the Narrow-Line Seyfert 1 Galaxy Arakelian 564 | |
| 2004ApJ...602..685P | The Planetary Nebula System and Dynamics in the Outer Halo of NGC 5128 | |
| 2004ApJ...602..705P | The Globular Cluster System of NGC 5128. II. Ages, Metallicities, Kinematics, and Formation | |
| 2004ApJ...602..738F | Highly Ionized Gas Surrounding High-Velocity Cloud Complex C | |
| 2004ApJ...602L..81K | Hubble Diagrams of Type Ia Supernovae in the Near-Infrared | |
| 2004ApJ...603...28B | On the Observed Rapid Motions in Extragalactic Radio Sources | |
| 2004ApJ...603...51H | Constraints on the Very High Energy Emission from BL Lacertae Objects | |
| 2004ApJ...603..425G | Dramatic X-Ray Spectral Variability of the Broad Absorption Line Quasar PG 2112+059 | |
| 2004ApJ...603..449C | A View of PKS 2155-304 with XMM-Newton Reflection Grating Spectrometers | |
| 2004ApJ...603..463B | Physical Conditions in the Narrow-Line Region of M51 | |
| 2004ApJ...603..495P | Molecular Gas in Candidate Double-Barred Galaxies. III. A Lack of Molecular Gas? | |
| 2004ApJ...604...63Y | The Cores of the Fe K Lines in Seyfert 1 Galaxies Observed by the Chandra High Energy Grating | |
| 2004ApJ...604..125B | Molecular Gas in the Lensed Lyman Break Galaxy cB58 | |
| 2004ApJ...604..141F | Hα-derived Star Formation Rates for the z = 0.84 Galaxy Cluster Cl J0023+0423B | |
| 2004ApJ...604..153C | NGC 3125-1: The Most Extreme Wolf-Rayet Star Cluster Known in the Local Universe | |
| 2004ApJ...604..495F | The Cosmic Evolution of Quasar Host Galaxies | |
| 2004ApJ...604..565D | [O I] 63 Micron Emission from High- and Low-Luminosity Active Galactic Nucleus Galaxies | |
| 2004ApJ...604..653D | XMM-Newton Observations of an Intermediate X-Ray Object in NGC 2276 | |
| 2004ApJ...604L..33Z | Obscured Binary Quasar Cores in SDSS J104807.74+005543.5? | |
| 2004ApJ...605...37S | A Disk Galaxy of Old Stars at z~2.5 | |
| 2004ApJ...605..105C | The Stellar Populations of Low-Luminosity Active Galactic Nuclei. I. Ground-based Observations | |
| 2004ApJ...605..144M | Galaxy Interaction and the Starburst-Seyfert Connection | |
| 2004ApJ...605..156G | 10 Micron Imaging of Seyfert Galaxies from the 12 Micron Sample | |
| 2004ApJ...605..183W | A Search for Kinematic Evidence of Radial Gas Flows in Spiral Galaxies | |
| 2004ApJ...605..714D | Fabry-Perot Absorption-Line Spectroscopy of NGC 7079: Kinematics and Bar Pattern Speed | |
| 2004ApJ...605L..17M | A Nursery of Young Objects: Intergalactic H II Regions in Stephan's Quintet | |
| 2004ApJ...605L.105S | Discovery of a Jetlike Structure at the High-Redshift QSO CXOMP J084128.3+131107 | |
| 2004ApJ...606..151O | Relativistic O VIII Emission and Ionized Outflow in NGC 4051 Measured with XMM-Newton | |
| 2004ApJ...606..173P | Testing Radiatively Inefficient Accretion Flow Theory: An XMM-Newton Observation of NGC 3998 | |
| 2004ApJ...606..237R | Missing Massive Stars in Starbursts: Stellar Temperature Diagnostics and the Initial Mass Function | |
| 2004ApJ...606..258W | The Superwind Galaxy NGC 4666: Gravitational Interactions and the Influence of the Resulting Starburst on the Interstellar Medium | |
| 2004ApJ...606..271G | The Star Formation Rate and Dense Molecular Gas in Galaxies | |
| 2004ApJ...606..291P | The Statistical Properties of Galaxies Containing Ultraluminous X-Ray Objects | |
| 2004ApJ...606..664D | The Faint Counterparts of MAMBO Millimeter Sources near the New Technology Telescope Deep Field | |
| 2004ApJ...606..741R | New Quasars Detected via Variability in the QUEST1 Survey | |
| 2004ApJ...606..829S | A High Spatial Resolution X-Ray and Hα Study of Hot Gas in the Halos of Star-forming Disk Galaxies. II. Quantifying Supernova Feedback | |
| 2004ApJ...606L..41G | MBH-σ Relation for a Complete Sample of Soft X-Ray-selected Active Galactic Nuclei | |
| 2004ApJ...607...90B | POX 52: A Dwarf Seyfert 1 Galaxy with an Intermediate-Mass Black Hole | |
| 2004ApJ...607..103L | Comparison of Bar Strengths and Fractions of Bars in Active and Nonactive Galaxies | |
| 2004ApJ...607..202M | A Redshift Survey of Nearby Galaxy Groups: The Shape of the Mass Density Profile | |
| 2004ApJ...607..226A | Optical Selection of Star-forming Galaxies at Redshifts 1 < z < 3 | |
| 2004ApJ...607..274C | The Complex Neutral Gas Dynamics of the Dwarf Starburst Galaxy NGC 625 | |
| 2004ApJ...607..794K | On the Relationship between the Optical Emission-Line and X-Ray Luminosities in Seyfert 1 Galaxies | |
| 2004ApJ...607..810M | Companions to Isolated Elliptical Galaxies: Revisiting the Bothun-Sullivan Sample | |
| 2004ApJ...607L..33B | The First IBIS/ISGRI Soft Gamma-Ray Galactic Plane Survey Catalog | |
| 2004ApJ...607L..99T | Luminous Infrared Galaxies as Plausible Gamma-Ray Sources for the Gamma-Ray Large Area Space Telescope and the Imaging Atmospheric Cerenkov Telescopes | |
| 2004ApJ...608..157M | High-Resolution X-Ray Spectroscopy of the Fe K Complex in IC 4329A | |
| 2004ApJ...608..189D | The Formation of Dust Lanes: Implications for Galaxy Evolution | |
| 2004ApJ...608..692B | The Gamma-Ray Bright BL Lacertae Object RX J1211+2242 | |
| 2004ApJ...608..698S | A Survey of Extended Radio Jets with Chandra and the Hubble Space Telescope | |
| 2004ApJ...608..768C | Extended Tidal Structure in Two Lyα-emitting Starburst Galaxies | |
| 2004ApJ...609...61H | A Study of CO Emission in High-Redshift QSOs Using the Owens Valley Millimeter Array | |
| 2004ApJ...609...80C | Evidence for Anisotropic Motion of the Clouds in Broad-Line Regions of BL Lacertae Objects | |
| 2004ApJ...609..113W | XMM-Newton Spectra of Intermediate-Mass Black Hole Candidates: Application of a Monte Carlo Simulated Model | |
| 2004ApJ...609..564S | Blazar Counterparts for 3EG Sources at -40° | |
| 2004ApJ...609..597B | FUSE Observations of Galactic and Intrinsic Absorption in the Spectrum of the Seyfert 1 Galaxy 2MASX J21362313-6224008 | |
| 2004ApJ...609..652M | The Mass Discrepancy-Acceleration Relation: Disk Mass and the Dark Matter Distribution | |
| 2004ApJ...609..667S | Star Formation Thresholds and Galaxy Edges: Why and Where | |
| 2004ApJ...610..151P | Evidence for Microarcsecond Structure in the BL Lacertae Object AO 0235+164 | |
| 2004ApJ...610..183M | Chandra Observations of NGC 4438: An Environmentally Damaged Galaxy in the Virgo Cluster | |
| 2004ApJ...610..201S | A Keck/HIRES Study of Kinematics of the Cold Interstellar Medium in Dwarf Starburst Galaxies | |
| 2004ApJ...610..213T | Diffuse X-Ray Emission in Spiral Galaxies | |
| 2004ApJ...610..745L | K-Band Properties of Galaxy Clusters and Groups: Luminosity Function, Radial Distribution, and Halo Occupation Number | |
| 2004ApJ...610..772C | The Nature of Radio Continuum Emission in the Dwarf Starburst Galaxy NGC 625 | |
| 2004ApJ...610L..17P | Where Are the High-Velocity Clouds in Local Group Analogs? | |
| 2004ApJ...611...68K | The Properties and Evolution of the Highly Ionized Gas in MR 2251-178 | |
| 2004ApJ...611..107L | Hubble Space Telescope STIS Ultraviolet Spectral Evidence of Outflow in Extreme Narrow-Line Seyfert 1 Galaxies. I. Data and Analysis | |
| 2004ApJ...611..125L | Hubble Space Telescope STIS Ultraviolet Spectral Evidence of Outflow in Extreme Narrow-Line Seyfert 1 Galaxies. II. Modeling and Interpretation | |
| 2004ApJ...611..164D | AC 114: A Cluster with a Soft X-Ray Tail | |
| 2004ApJ...611..186N | A Supernova Factory in the Merger System Arp 299 | |
| 2004ApJ...611..795C | The U-Band Galaxy Luminosity Function of Nearby Clusters | |
| 2004ApJ...611..811F | XMM-Newton Study of A3562 and Its Immediate Shapley Environs | |
| 2004ApJ...611..835P | The Structure, Kinematics, and Physical Properties of the Molecular Gas in the Starburst Nucleus of NGC 253 | |
| 2004ApJ...611..940S | X-Ray and Infrared Observations of Embedded Young Stars in L1630 | |
| 2004ApJ...611L..13F | The X-Ray Spectrum of the z=6.30 QSO SDSS J1030+0524 | |
| 2004ApJ...612..131O | Hubble Space Telescope STIS Far-Ultraviolet Observations of the Central Nebulae in the Cooling-Core Clusters A1795 and A2597 | |
| 2004ApJ...612..749Z | A View through Faraday's Fog. II. Parsec-Scale Rotation Measures in 40 Active Galactic Nuclei | |
| 2004ApJ...612..780T | Exploring the Nucleus of the Gigamaser Galaxy TXS 2226-184 | |
| 2004ApJ...612..805S | ESO 3060170: A Massive Fossil Galaxy Group with a Heated Gas Core? | |
| 2004ApJ...612..825H | Far-Ultraviolet Observations of Molecular Hydrogen in the Diffuse Interstellar Medium of Starburst Galaxies | |
| 2004ApJ...612..837L | Observations of Cold Dust in Nearby Elliptical Galaxies | |
| 2004ApJ...612..848H | A Chandra View of the Normal S0 Galaxy NGC 1332. I. An Unbroken, Steep Power-Law Luminosity Function for the Low-Mass X-Ray Binary Population | |
| 2004ApJ...612..974C | The Late-Time Radio Emission from SN 1993J at Meter Wavelengths | |
| 2004ApJ...612L.113S | The Reverberation Radius of the Central Dust Hole in NGC 5548 | |
| 2004ApJ...613..129W | Variability of Narrow, Associated Absorption Lines in Moderate- and Low-Redshift Quasars | |
| 2004ApJ...613..262L | The Colors of Dwarf Elliptical Galaxy Globular Cluster Systems, Nuclei, and Stellar Halos | |
| 2004ApJ...613..682P | Central Masses and Broad-Line Region Sizes of Active Galactic Nuclei. II. A Homogeneous Analysis of a Large Reverberation-Mapping Database | |
| 2004ApJ...613..716C | Are the Jets Accelerated from the Disk Coronas in Some Active Galactic Nuclei? | |
| 2004ApJ...613..752G | A Sample of Low-Redshift BL Lacertae Objects. I. The Radio Data | |
| 2004ApJ...613..770M | Hydrocarbon Dust Absorption in Seyfert Galaxies and Ultraluminous Infrared Galaxies | |
| 2004ApJ...613..851K | Massive Star Formation Rates and Radial Distributions from Hα Imaging of 84 Virgo Cluster and Isolated Spiral Galaxies | |
| 2004ApJ...613..866K | Hα Morphologies and Environmental Effects in Virgo Cluster Spiral Galaxies | |
| 2004ApJ...613..914H | Star Formation in H I-Selected Galaxies. I. Sample Characteristics | |
| 2004ApJ...613..986P | Polycyclic Aromatic Hydrocarbons as a Tracer of Star Formation? | |
| 2004ApJ...613.1120G | The Luminosity of SN 1999by in NGC 2841 and the Nature of ``Peculiar'' Type Ia Supernovae | |
| 2004ApJ...613L.101D | Detection of 21 Centimeter H I Absorption at z=0.78 in a Survey of Radio Continuum Sources | |
| 2004ApJ...614..122I | Near-infrared K-Band Spectroscopic Investigation of Seyfert 2 Nuclei in the CfA and 12 Micron Samples | |
| 2004ApJ...614..547S | Near-Infrared Spectroscopy of High-Redshift Active Galactic Nuclei. I. A Metallicity-Accretion Rate Relationship | |
| 2004ApJ...614..558N | Near-Infrared Spectroscopy of High-Redshift Active Galactic Nuclei. II. Disappearing Narrow-Line Regions and the Role of Accretion | |
| 2004ApJ...614..634G | X-Ray Luminous Galaxies. II. Chandra and XMM-Newton Observations of the ``Composite'' Galaxy IRAS 20051-1117 | |
| 2004ApJ...614..641B | INTEGRAL and XMM-Newton Spectral Studies of NGC 4388 | |
| 2004ApJ...614..648M | The Unusual Tidal Dwarf Candidate in the Merger System NGC 3227/3226: Star Formation in a Tidal Shock? | |
| 2004ApJ...614..679L | The Color-Magnitude Effect in Early-Type Cluster Galaxies | |
| 2004ApJ...614..692Y | Chandra X-Ray Observations of Galaxy Cluster A168 | |
| 2004ApJ...614..698L | Chemical Abundances of H II Regions in the Starburst Galaxy NGC 1705 | |
| 2004ApJ...614L..33A | The Line-of-Sight Velocity Distributions of Intracluster Planetary Nebulae in the Virgo Cluster Core | |
| 2004ApJ...615..118E | The Number Density of 0.6 < z < 1.7 Mg II Systems from CORALS: Observational Biases at Intermediate Redshift | |
| 2004ApJ...615..135S | A Composite Extreme-Ultraviolet QSO Spectrum from FUSE | |
| 2004ApJ...615..645O | Supermassive Black Holes in Active Galactic Nuclei. II. Calibration of the Black Hole Mass-Velocity Dispersion Relationship for Active Galactic Nuclei | |
| 2004ApJ...615..689G | The Nature of Nearby Counterparts to Intermediate-Redshift Luminous Compact Blue Galaxies. I. Optical/H I Properties and Dynamical Masses | |
| 2004ApJ...615L.109O | Properties of Molecular Gas in Massive Low Surface Brightness Galaxies, Including New 12CO Observations of Three Malin 1 ``Cousins'' | |
| 2004ApJ...616..110H | The VSOP 5 GHz Active Galactic Nucleus Survey. IV. The Angular Size/Brightness Temperature Distribution | |
| 2004ApJ...616..192C | Can Early-Type Galaxies Evolve from the Fading of the Disks of Late-Type Galaxies? | |
| 2004ApJ...616..707H | Circumnuclear Structure and Black Hole Fueling: Hubble Space Telescope NICMOS Imaging of 250 Active and Normal Galaxies | |
| 2004ApJ...616..730F | Chandra Observations of the Quiescent Nuclear Black Hole of NGC 821: Evidence of Nuclear Activity? | |
| 2004ApJ...616..745M | Absence of Dwarf Galaxies at High Redshifts: Evidence from a Galaxy Group | |
| 2004ApJ...616..752L | Metal Abundances of KISS Galaxies. III. Nebular Abundances for Fourteen Galaxies and the Luminosity-Metallicity Relationship for H II Galaxies | |
| 2004ApJ...617....1T | Cosmological Parameters σ8, the Baryon Density Ωb, the Vacuum Energy Density ΩΛ, the Hubble Constant and the UV Background Intensity from a Calibrated Measurement of H I Lyα Absorption at z=1.9 | |
| 2004ApJ...617..214I | Comparison of Nuclear Starburst Luminosities between Seyfert 1 and 2 Galaxies Based on Near-Infrared Spectroscopy | |
| 2004ApJ...617..232M | On VII and O VIII Absorption by Hot Gas in the Vicinity of the Galaxy | |
| 2004ApJ...617..262S | Chandra Observations of Diffuse Gas and Luminous X-Ray Sources around the X-Ray-bright Elliptical Galaxy NGC 1600 | |
| 2004ApJ...617..811S | Spectrophotometric and Weak Lensing Survey of a Supercluster and Typical Field Region. I. Spectroscopic Redshift Measurements | |
| 2004ApJ...617..879L | K-band Properties of Galaxy Clusters and Groups: Brightest Cluster Galaxies and Intracluster Light | |
| 2004ApJ...617..903W | The Fundamental Plane Evolution of Active Galactic Nucleus Host Galaxies | |
| 2004ApJ...617..939M | An Expanded Rossi X-Ray Timing Explorer Survey of X-Ray Variability in Seyfert 1 Galaxies | |
| 2004ApJ...617.1004W | Luminous Compact Blue Galaxies in the Local Universe | |
| 2004ApJ...617.1017S | A Sample of Field Ellipticals | |
| 2004ApJ...617.1047H | A Chandra View of the Normal S0 Galaxy NGC 1332. II. Solar Abundances in the Hot Gas and Implications for Supernova Enrichment | |
| 2004ApJ...617L..29B | A Green Bank Telescope Search for Water Masers in Nearby Active Galactic Nuclei | |
| 2004ApJ...617L.111T | The Morphological and Luminosity Content of Poor Galaxy Groups | |
| 2004ApJS..150...43G | The Chandra Multiwavelength Project: Optical Follow-up of Serendipitous Chandra Sources | |
| 2004ApJS..150...73E | A Complete Atlas of Recalibrated Hubble Space Telescope Faint Object Spectrograph Spectra of Active Galactic Nuclei and Quasars. I. Pre-COSTAR Spectra | |
| 2004ApJS..150..165K | Emission Line Properties of Active Galactic Nuclei from a Post-COSTAR Hubble Space Telescope Faint Object Spectrograph Spectral Atlas | |
| 2004ApJS..150..187O | Parsec-Scale Blazar Monitoring: The Data | |
| 2004ApJS..150..367P | The Globular Cluster System of NGC 5128. I. Survey and Catalogs | |
| 2004ApJS..150..417C | A Deep, High-Resolution Survey at 74 MHz | |
| 2004ApJS..151..193S | A High Spatial Resolution X-Ray and Hα Study of Hot Gas in the Halos of Star-forming Disk Galaxies. I. Spatial and Spectral Properties of the Diffuse X-Ray Emission | |
| 2004ApJS..152....1S | Intrinsic Absorption in the Spectrum of Markarian 279: Simultaneous Chandra, FUSE, and STIS Observations | |
| 2004ApJS..152...29P | The Local Lyα Forest. IV. Space Telescope Imaging Spectrograph G140M Spectra and Results on the Distribution and Baryon Content of H I Absorbers | |
| 2004ApJS..152...63G | HCN Survey of Normal Spiral, Infrared-luminous, and Ultraluminous Galaxies | |
| 2004ApJS..152..175M | Structure of Disk-dominated Galaxies. II. Color Gradients and Stellar Population Models | |
| 2004ApJS..153...93G | Evidence for Interactions in H I Imaging of Seyfert Galaxies | |
| 2004ApJS..153..119M | Faint Blue Objects at High Galactic Latitude. VIII. Performance Characteristics of the US Survey | |
| 2004ApJS..153..165R | FUSE and STIS Observations of the Warm-hot Intergalactic Medium toward PG 1259+593 | |
| 2004ApJS..153..223C | The ACS Virgo Cluster Survey. I. Introduction to the Survey | |
| 2004ApJS..153..397B | Photometric and Morphological Properties of Nearby Cluster Galaxies | |
| 2004ApJS..153..411D | BUDDA: A New Two-dimensional Bulge/Disk Decomposition Code for Detailed Structural Analysis of Galaxies | |
| 2004ApJS..153..429K | Strong Emission Line H II Galaxies in the Sloan Digital Sky Survey. I. Catalog of DR1 Objects with Oxygen Abundances from Te Measurements | |
| 2004ApJS..154...60Y | Characterization of Extragalactic 24 Micron Sources in the Spitzer First Look Survey | |
| 2004ApJS..154..222W | Infrared Array Camera (IRAC) Observations of M81 | |
| 2004ApJS..154..248E | Far-Infrared Imaging of NGC 55 | |
| 2004ApJS..154..253H | The Anatomy of Star Formation in NGC 300 | |
| 2004ApJS..154..509J | The ACS Virgo Cluster Survey. II. Data Reduction Procedures | |
| 2004ApJS..154..519S | The Ultraluminous X-Ray Source Population from the Chandra Archive of Galaxies | |
| 2004ApJS..154..541A | Studies of Extragalactic Formaldehyde and Radio Recombination Lines | |
| 2004ApJS..155...33S | The VSOP 5 GHz Active Galactic Nucleus Survey. III. Imaging Results for the First 102 Sources | |
| 2004ApJS..155...89G | A Wide-Field, Low-Frequency Radio Survey of the Field of M31. I. Construction and Statistical Analysis of the Source Catalog | |
| 2004ApJS..155..257R | Efficient Photometric Selection of Quasars from the Sloan Digital Sky Survey: 100,000 z < 3 Quasars from Data Release One | |
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