Results 61 to 70 of about 113,929 (193)

THE METALLICITY EVOLUTION OF INTERACTING GALAXIES [PDF]

The Astrophysical Journal, 2012
Nuclear inflows of metal-poor interstellar gas triggered by galaxy interactions can account for the systematically lower central oxygen abundances observed in local interacting galaxies. Here, we investigate the metallicity evolution of a large set of simulations of colliding galaxies.
Torrey, Paul, Cox, T J, Kewley, Lisa, Hernquist, Lars   +3 more
openaire   +3 more sources

The Origin of Neutral Hydrogen Clouds in Nearby Galaxy Groups: Exploring the Range Of Galaxy Interactions

, 2011
We combine high resolution N-body simulations with deep observations of neutral hydrogen (HI) in nearby galaxy groups in order to explore two well-known theories of HI cloud formation: HI stripping by galaxy interactions and dark matter minihalos with ...
Abraham, Bahcall, Barentine, Bell, Berrier, Bureau, Chemin, Chynoweth, Chynoweth, Chynoweth, Combes, Conselice, D'Onghia, Emil Polisensky, Fouque, Fraternali, Fukugita, Glen I. Langston, Gnedin, Hess, Hummel, Katie M. Chynoweth, Kelly Holley-Bockelmann, Kennicutt, Kennicutt, Kereš, Knapen, Knollmann, Kravtsov, Kuo, Langston, Laurikainen, Lockman, Lockman, Lotz, Miller, Mulder, Muller, Ott, Patton, Patton, Pisano, Putman, Schwarz, Shull, Simon, Simon, Strickland, Thilker, Thom, Wakker, Wakker, Westmeier, Zwaan   +53 more
core   +1 more source

Cold Gas Infall onto a Brightest Group Galaxy via a Gas-rich Minor Merger

The Astrophysical Journal Letters
Dust and cold gas are not uncommon in nearby early-type galaxies (ETGs) and represent an important aspect of their evolution. However, their origin has been debated for decades.
Ming-Yang Zhuang, Jinyi Shangguan, Yuan Bian, Yue Shen, Luis C. Ho, Min Du, Junyao Li, Zhao-Yu Li, Jing Wang   +8 more
doaj   +1 more source

FAST Reveals the Extended H i Halo and Accretion Signatures of NGC 2683

The Astrophysical Journal
We present the results of our recent H i observations conducted on the edge-on galaxy NGC 2683 using the Five-hundred-meter Aperture Spherical radio Telescope (FAST).
Qian Jiao, Ming Zhu, Bernd Vollmer, Mei Ai, Haiyang Yu, Qinghua Tan, Cheng Cheng, Yang Gao   +7 more
doaj   +1 more source

The relation between bar formation, galaxy luminosity, and environment

, 2013
We derive the bar fraction in three different environments ranging from the field to Virgo and Coma clusters, covering an unprecedentedly large range of galaxy luminosities (or, equivalently, stellar masses).
Aguerri, J. A. L., Corsini, E. M., Mendez-Abreu, J., Sanchez-Janssen, R., Zarattini, S.   +4 more
core  

Anatomy of the Star Formation in a Tidally Disturbed Disk Galaxy: NGC 3718

The Astrophysical Journal
We present a UV, optical, and near-IR study of the star-forming complexes in the nearby peculiar galaxy NGC 3718, using Ultraviolet Imaging telescope, Galaxy Evolution Explorer, Spitzer, and DECam Legacy Survey imaging data.
Chandan Watts, Mousumi Das, Sudhanshu Barway   +2 more
doaj   +1 more source

Deep spectroscopy of a young radio source at z=0.521

, 2005
9C J1503+4528 is a very young CSS radio galaxy, with an age of order 10^4 years. This source is an ideal laboratory for the study of the intrinsic host galaxy/IGM properties, radio source interactions, evidence for young stellar populations and the radio
Baldwin, Best, Binette, Bolton, Bolton, Bruzual, Dopita, Fanti, Groves, Groves, Howarth, Inskip, Inskip, Moy, Murgia, O'Dea, Oke, Owsianik, Readhead, Snellen, Taylor, Waldram   +21 more
core   +1 more source

The Growth of Galaxy Stellar Haloes over 0.2 ≤ z ≤ 1.1

The Astrophysical Journal
Galaxies are predicted to assemble their stellar haloes through the accretion of stellar material from interactions with their cosmic environment. Observations that trace stellar halo buildup probe the processes that drive galaxy size and stellar mass ...
Devin J. Williams, Ivana Damjanov, Marcin Sawicki, Harrison Souchereau, Lingjian Chen, Guillaume Desprez, Angelo George, Marianna Annunziatella, Stéphane Arnouts, Stephen Gwyn, Danilo Marchesini, Anna Sajina   +11 more
doaj   +1 more source

A Physically Motivated Framework to Compare the Merger Timescales of Isolated Low- and High-mass Galaxy Pairs Across Cosmic Time

The Astrophysical Journal
The merger timescales of isolated low-mass pairs (10 ^8 < M _* < 5 × 10 ^9 M _⊙ ) on cosmologically motivated orbits have not yet been studied in detail, though isolated high-mass pairs (5 × 10 ^9 < M _* < 10 ^11 M _⊙ ) have been studied extensively.
Katie Chamberlain, Ekta Patel, Gurtina Besla, Paul Torrey, Vicente Rodriguez-Gomez   +4 more
doaj   +1 more source

AGNs and galaxy interactions

, 2007
We perform a statistical analysis of AGN host characteristics and nuclear activity for AGNs in pairs and without companions. Our study concerns a sample of AGNs derived from the SDSS-DR4 data by Kauffmann et al (2003) and pair galaxies obtained from the same data set by Alonso et al. (2006).
Alonso, M. Sol, Lambas, Diego G., Tissera, Patricia, Coldwell, Georgina   +3 more
openaire   +2 more sources