English
Related papers

Related papers: Isolated Galaxies versus Interacting Pairs with Ma…

200 papers

The aim of this work is to study the effects of environment on the growth in size of galaxies. We examine the stellar mass-size relation for a sample of isolated galaxies interpreted as stellar systems where evolution has been mainly…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-16 Mirian Fernández Lorenzo , Jack Sulentic , Lourdes Verdes-Montenegro , Maria del Carmen Argudo-Fernández

The evolution of galaxy merger rates and its impact on galaxy properties have been studied intensively over the last decade. It becomes clear now that various types of mergers, i.e. gas-rich (wet), gas-poor (dry), or mixed mergers, affect…

Cosmology and Nongalactic Astrophysics · Physics 2009-10-17 Lihwai Lin

We investigate the connection between stellar mass distribution, assembly history, and star formation timescales in low-redshift massive early-type galaxies (ETGs) by combining deep LegacySurvey imaging with MaNGA's spatially resolved…

Astrophysics of Galaxies · Physics 2026-03-04 Xiao-Ya Zhang , Song Huang , Meng Gu

Using mid-infrared star formation rate and stellar mass indicators in $\textit{WISE}$, we construct and contrast the relation between star formation rate and stellar mass for isolated and paired galaxies. Our samples comprise a selection of…

We present a catalogue of dynamical properties for 2368 late-type galaxies from the MaNGA survey. The latter complements the catalogue of photometric properties for the same sample based on deep optical DESI photometry processed with…

Astrophysics of Galaxies · Physics 2023-04-06 Nikhil Arora , Stéphane Courteau , Connor Stone , Andrea V. Macció

In this study, we have carried out a detailed, statistical analysis of isolated model galaxies, taking advantage of publicly available hierarchical galaxy formation models. To select isolated galaxies, we employ 2D methods widely used in…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-15 Michaela Hirschmann , Gabriella De Lucia , Angela Iovino , Olga Cucciati

We analyse the kinematics and chemistry of the bulge stars of two simulated disc galaxies using our chemodynamical galaxy evolution code GCD+. First we compare stars that are born inside the galaxy with those that are born outside the…

Astrophysics of Galaxies · Physics 2015-05-14 A. Rahimi , D. Kawata , Chris B. Brook , Brad K. Gibson

We compare stellar mass surface density, metallicity, age, and line-of-sight velocity dispersion profiles in massive ($M_*\geq10^{10.5}\,\mathrm{M_\odot}$) present-day early-type galaxies (ETGs) from the MaNGA survey with simulated galaxies…

We combine an unprecedented MaNGA sample of over 3,000 passive galaxies in the stellar mass range 10^{9}-10^{12} Msun with the Sloan Digital Sky Survey group catalog by Tinker to quantify how central and satellite formation, quantified by…

The modification of star formation (SF) in galaxy interactions is a complex process, with SF observed to be both enhanced in major mergers and suppressed in minor pair interactions. Such changes likely to arise on short timescales and be…

We use a highly complete subset of the GAMA-II redshift sample to fully describe the stellar mass dependence of close-pairs and mergers between 10^8 Msun and 10^12 Msun. Using the analytic form of this fit we investigate the total stellar…

We employ a suite of 75 simulations of galaxies in idealised major mergers (stellar mass ratio ~2.5:1), with a wide range of orbital parameters, to investigate the spatial extent of interaction-induced star formation. Although the total…

Astrophysics of Galaxies · Physics 2015-06-23 Jorge Moreno , Paul Torrey , Sara L. Ellison , David R. Patton , Asa F. L. Bluck , Gunjan Bansal , Lars Hernquist

Stellar counterrotating (CR) galaxies are systems hosting two large-scale stellar components rotating in opposite directions -- a main, preexisting galaxy body with an older stellar population and a younger CR stellar disk likely formed…

The basic properties of galaxies can be affected by both nature (internal processes) or nurture (interactions and effects of environment). Deconvolving the two effects is an important current effort in astrophysics. Observed properties of a…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-03 Mirian Fernández Lorenzo , Jack Sulentic , Lourdes Verdes-Montenegro , Jose Enrique Ruiz , Jose Sabater , Susana Sánchez

We explore a model in which efficient star formation in galaxies is triggered by merging satellites. We show that the merger/interaction rates predicted by hierarchical galaxy formation models depend strongly on galaxy mass. If a merger of…

Astrophysics · Physics 2007-05-23 Guinevere Kauffmann , Stephane Charlot , Michael L. Balogh

Galaxy pairs provide a potentially powerful means of studying triggered star formation from galaxy interactions. We use a large cosmological N-body simulation coupled with a well-tested semi-analytic substructure model to demonstrate that…

We study seven simulated disc galaxies, three with a quiescent merger history, and four with mergers in their last 9 Gyr of evolution. We compare their structure at z=0 by decomposing them into "mono-age populations" (MAPs) of stars within…

Astrophysics of Galaxies · Physics 2014-07-04 Marie Martig , Ivan Minchev , Chris Flynn

The main sequence (MS) of star-forming galaxies (SFGs) is the tight relation between the galaxy stellar mass and its star formation rate (SFR) and was observed up to z ~ 6. The MS relation can be used as a reference for understanding the…

Star formation depends strongly both on the local environment of galaxies, and on the internal dynamics of the interstellar medium. To disentangle the two effects, we obtained, in the framework of the AMIGA project, Ha and Gunn r…

Astrophysics · Physics 2009-11-13 S. Verley , F. Combes , L. Verdes-Montenegro , G. Bergond , S. Leon

By combining new long-slit spectral data obtained with the Southern African Large Telescope (SALT) for 9 galaxies with previously published our observations for additional 12 galaxies we study the stellar and gaseous kinematics as well as…

Astrophysics of Galaxies · Physics 2015-05-07 Ivan Yu. Katkov , Alexei Yu. Kniazev , Olga K. Sil'chenko