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Spectral Classification of Emission-Line Galaxies

A revised method of classification of narrow-line active galaxies and H II region-like galaxies is proposed. It involves the line ratios which take full advantage of the physical distinction between…
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Galactic Winds

Galactic winds are the primary mechanism by which energy and metals are recycled in galaxies and are deposited into the intergalactic medium. New observations are revealing the ubiquity of this…
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Outflows in Infrared-Luminous Starbursts at z < 0.5. II. Analysis and Discussion

We have performed an absorption-line survey of outflowing gas in 78 starburst-dominated, infrared-luminous galaxies. This is the largest study of superwinds at z ≲ 3. Superwinds are found in almost…
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Optical Spectroscopy of Luminous Infrared Galaxies II. Analysis of the Nuclear and long-Slit Data

A spectroscopic survey of a sample of 201 luminous IRAS galaxies was caried out using the Palomar 5-meter amd University of Hawaii 2.2-m telescopes.
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SPITZER QUASAR AND ULIRG EVOLUTION STUDY (QUEST). IV. COMPARISON OF 1 Jy ULTRALUMINOUS INFRARED GALAXIES WITH PALOMAR-GREEN QUASARS

We report the results from a comprehensive study of 74 ultraluminous infrared galaxies (ULIRGs) and 34 Palomar-Green (PG) quasars within z ∼ 0.3 observed with the Spitzer Infrared Spectrograph (IRS).…
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The Farthest Known Supernova: Support for an Accelerating Universe and a Glimpse of the Epoch of Deceleration

We present photometric observations of an apparent Type Ia supernova (SN Ia) at a redshift of ~1.7, the farthest SN observed to date. The supernova, SN 1997ff, was discovered in a repeat observation…
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Massive molecular outflows and evidence for AGN feedback from CO observations

We study the properties of massive, galactic-scale outflows of molecular gas and investigate their impact on galaxy evolution. We present new IRAMPdBI CO(1-0) observations of local ultra-luminous…
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The X-ray counterpart to the gravitational-wave event GW170817

TLDR
The detection of X-ray emission at a location coincident with the kilonova transient provides the missing observational link between short γ-ray bursts and gravitational waves from neutron-star mergers, and gives independent confirmation of the collimated nature of the γ,ray-burst emission.
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Optical Spectroscopy of the IRAS 1 Jy Sample of Ultraluminous Infrared Galaxies

This paper discusses the optical spectroscopic properties of the IRAS 1 Jy sample (f60 > 1 Jy) of ultraluminous infrared galaxies (ULIGs: LIR > 1012 L☉; H0 = 75 km s-1 Mpc-1 and q0 = 0). One hundred…
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Optical and Near-Infrared Imaging of the IRAS 1 Jy Sample of Ultraluminous Infrared Galaxies. II. The Analysis

An R and K′ atlas of the IRAS 1 Jy sample of 118 ultraluminous infrared galaxies (ULIGs) was presented in a companion paper (our Paper I). The present paper discusses the results from the analysis of…
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