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This chapter reviews how galactic inflows influence galaxy metallicity. The goal is to discuss predictions from theoretical models, but particular emphasis is placed on the insights that result from using models to interpret observations.…

Astrophysics of Galaxies · Physics 2017-05-31 Kristian Finlator

We present here the first study of the X-ray properties of an evolutionary sample of merging galaxies. Both ROSAT PSPC and HRI data are presented for a sample of eight interacting galaxy systems, each believed to involve a similar encounter…

Astrophysics · Physics 2009-10-30 A. M. Read , T. J. Ponman

Combining resolved optical spectroscopy with panoramic HST imaging, we study the dynamical properties of spiral galaxies as a function of position across two intermediate redshift clusters, and we compare the cluster population to field…

Astrophysics · Physics 2011-02-11 Sean M. Moran , Neil Miller , Tommaso Treu , Richard S. Ellis , Graham P. Smith

Recent work has suggested that the amplitude of the size mass relation of massive early type galaxies evolves with redshift. Here we use a semi-analytical galaxy formation model to study the size evolution of massive early type galaxies. We…

Astrophysics of Galaxies · Physics 2014-12-22 Lizhi Xie , Qi Guo , Andrew P. Cooper , Carlos S. Frenk , Ran Li , Liang Gao

The role of the cosmic web in shaping galaxy properties is investigated in the GAMA spectroscopic survey in the redshift range $0.03 \leq z \leq 0.25$. The stellar mass, $u - r$ dust corrected colour and specific star formation rate (sSFR)…

A critical issue in studying the evolution of galaxy clusters is to find ways that enable meaningful comparisons of clusters observed at different redshifts, as well as in various stages of their growth. Studies in the past have typically…

Astrophysics of Galaxies · Physics 2025-03-19 Yen-Ting Lin , Kai-Feng Chen , Tsung-Chi Chen , Chen-Yu Chuang , Masamune Oguri

Mergers of gas-poor galaxies, so-called dry mergers, may play a fundamental role in the assembly of the most massive galaxies, and therefore, in galaxy formation theories. Using the SDSS, we have serendipitously discovered a rare system in…

Astrophysics of Galaxies · Physics 2015-06-19 M. E. Filho , P. Brochado , J. Brinchmann , C. Lobo , B. Henriques , R. Grutzbauch , J. M. Gomes

Using deep infrared observations conducted with the MOIRCS on the Subaru Telescope in GOODS-N combined with public surveys in GOODS-S, we investigate the dependence on stellar mass, M_*, and galaxy type of the close pair fraction (5 kpc < r…

Cosmology and Nongalactic Astrophysics · Physics 2010-01-15 Kevin Bundy , Masataka Fukugita , Richard S. Ellis , Thomas A. Targett , Sirio Belli , Tadayuki Kodama

Mergers between red galaxies are observed to be common in the nearby Universe, and are thought to be the dominant mechanism by which massive galaxies grow their mass at late times. These ``dry'' mergers can be readily identified in very…

Astrophysics · Physics 2009-11-13 K. E. Whitaker , P. G. van Dokkum

We use a large sample of $\sim 350,000$ galaxies constructed by combining the UKIDSS UDS, VIDEO/CFHT-LS, UltraVISTA/COSMOS and GAMA survey regions to probe the major merging histories of massive galaxies ($>10^{10}\ \mathrm{M}_\odot$) at…

The link between massive red galaxies in the local Universe and star-forming galaxies at high redshift is investigated with a semi-analytic model that has proven successful in many ways, e.g. explaining the galaxy colour-magnitude…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-12 Andrea Cattaneo , Joanna Woo , Avishai Dekel , Sandra M. Faber

Galaxy mergers are crucial to understanding galaxy evolution, therefore we must determine their observational signatures to select them from large IFU galaxy samples such as MUSE and SAMI. We employ 24 high-resolution idealised…

High-redshift ($z\sim2-3$) galaxies accrete circumgalactic gas through cold streams. Recent high-resolution MHD simulations of these streams showed a significant amplification of the intergalactic magnetic field in the shear layer around…

Astrophysics of Galaxies · Physics 2024-11-20 Nicolas Ledos , Evangelia Ntormousi , Shinsuke Takasao , Kentaro Nagamine

JWST has measured an unprecedented abundance of galaxies above $z\gtrsim 4-5$, whose formation and evolution are still difficult to reconcile within traditional galaxy evolution models in a $\Lambda$CDM framework. Here, we present a study…

We use galaxy and dark halo data from the public database for the Millennium Simulation to study the growth of galaxies in the De Lucia et al. (2006) model for galaxy formation. Previous work has shown this model to reproduce many aspects…

Astrophysics · Physics 2009-11-13 Qi Guo , Simon D. M. White

An introduction is given to projects investigating galaxy evolution quantitatively by spectroscopic observations of very distant galaxies that have weak apparent brightnesses and small sizes as it is feasible with 10m-class telescopes like…

Astrophysics · Physics 2007-05-23 Bodo L. Ziegler

We study the growth of massive galaxies from z=2 to the present using data from the NEWFIRM Medium Band Survey. The sample is selected at a constant number density of n=2x10^-4 Mpc^-3, so that galaxies at different epochs can be compared in…

Recent observational and theoretical works have suggested that the Tully-Fisher Relation might be generalised to include dispersion-dominated systems by combining the rotation and dispersion velocity in the definition of the kinematical…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-11 Maria E. De Rossi , Patricia B. Tissera , Susana E. Pedrosa

Galaxies above redshift 1 can be very clumpy, with irregular morphologies dominated by star complexes as large as 2 kpc and as massive as a few 10^8 or 10^9 Mo. Their co-moving densities and rapid evolution suggest that most present-day…

Cosmology and Nongalactic Astrophysics · Physics 2009-11-13 Frederic Bournaud , Bruce G. Elmegreen
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