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221 papers · 1 filter
The Galactic O-Star Spectroscopic Survey (GOSSS). II. Bright Southern Stars
A. Sota, J. Maíz Apellániz, N. I. Morrell +5
We present the second installment of GOSSS, a massive spectroscopic survey of Galactic O stars, based on new homogeneous, high signal-to-noise ratio, R ~ 2500 digital observations…
Evolution of Broad-line Emission from Active Galactic Nuclei
Moshe Elitzur, Luis C. Ho, Jonathan R. Trump
Apart from viewing-dependent obscuration, intrinsic broad-line emission from active galactic nuclei (AGNs) follows an evolutionary sequence: Type …
Spaxel Analysis: Probing the Physics of Star Formation in Ultraluminous Infrared Galaxies
Michael A. Dopita, Jeffrey Rich, Frédéric P. A. Vogt +5
This paper presents a detailed spectral pixel (spaxel) analysis of the ten Luminous Infrared Galaxies (LIRGs) previously observed with the Wide Field Spectrograph (WiFeS), an integ…
Star Formation and Environmental Quenching of GEEC2 Group Galaxies at z~1
Angus Mok, Michael L. Balogh, Sean L. McGee +7
We present new analysis from the GEEC2 spectroscopic survey of galaxy groups at . Our previous work revealed an intermediate population between the star-forming and quiesc…
Discovery of a transparent sightline at ρ < 20 kpc from an interacting pair of galaxies
Sean D. Johnson, Hsiao-Wen Chen, John S. Mulchaey +3
We report the discovery of a transparent sightline at projected distances of ρ < 20 kpc to an interacting pair of mature galaxies at z = 0.12. The sightline of the UV-bright quasar…
The incidence of stellar mergers and mass gainers among massive stars
S. E. de Mink, H. Sana, N. Langer +2
Because the majority of massive stars are born as members of close binary systems, populations of massive main-sequence stars contain stellar mergers and products of binary mass tr…