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We use semi-analytical modelling of galaxy formation to study the redshift evolution of the galaxy merger fractions and merger ratesin Lambda CDM and quintessence (QCDM) cosmologies, their dependence on physical parameters as the…

Astrophysics · Physics 2009-11-06 S. Khochfar , A. Burkert

We investigate the formation and evolution of z=0 massive compact galaxies (MCGs) in the IllustrisTNG cosmological simulation. We found that, as in observations, MCGs are mainly old (median age $\sim 10.8$ Gyr), have super-solar…

Astrophysics of Galaxies · Physics 2023-07-26 F. S. Lohmann , A. Schnorr-Müller , M. Trevisan , T. V. Ricci , K. Slodkowski Clerici

We study the relationship between the morphology and star formation history (SFH) of 361 quiescent galaxies (QGs) at redshift $\langle z_{obs}\rangle\approx 2$, with stellar mass $\log M_*\ge10.3$, selected with the UVJ technique. Taking…

Astrophysics of Galaxies · Physics 2022-08-30 Zhiyuan Ji , Mauro Giavalisco

Matsuoka & Kawara (2010) showed that the number density of the most massive galaxies (log M/M_sun=11.5-12.0) increases faster than that of the next massive group (log M/M_sun=11.0-11.5) during 0 < z < 1. This appears to be in contradiction…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-12 Jaehyun Lee , Sukyoung K. Yi

We investigate the total major (> 1:4 by stellar mass) and minor (> 1:100 by stellar mass) merger history of a population of 80 massive (M_* > 10^11 M_sol) galaxies at high redshifts (z = 1.7 - 3). We utilize extremely deep and high…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-03 Asa F. L. Bluck , Christopher J. Conselice , Fernando Buitrago , Ruth Gruetzbauch , Carlos Hoyos , Alice Mortlock , Amanda E. Bauer

[abridged] We study the dependence of the galaxy size evolution on morphology, stellar mass and large scale environment for a sample of 298 group and 384 field quiescent early-type galaxies from the COSMOS survey, selected from z~1 to the…

We present a catalog of about 25,000 images of massive ($M_{\star} \ge 10^9 M_{\odot}$) galaxies at redshift $3 \leq z \leq 6$ from the TNG50 cosmological simulation, tailored for observations at multiple wavelengths carried out with JWST.…

We measure the role of major and minor mergers in forming the stellar masses of galaxies over $0<z<3$ using a combination of $\sim 3.25$ deg$^{2}$ of the deepest ground based near-infrared imaging taken to date as part of the REFINE survey.…

Astrophysics of Galaxies · Physics 2022-12-07 Christopher J. Conselice , Carl J. Mundy , Leonardo Ferreira , Kenneth Duncan

We present deep, near-infrared HST/WFC3 grism spectroscopy and imaging for a sample of 14 galaxies at z~2 selected from a mass-complete photometric catalog in the COSMOS field. By combining the grism observations with photometry in 30…

Cosmology and Nongalactic Astrophysics · Physics 2015-02-05 Jens-Kristian Krogager , Andrew W. Zirm , Sune Toft , Allison Man , Gabriel Brammer

It is still a challenge to assess the merger fraction of galaxies at different cosmic epochs in order to probe the evolution of their mass assembly. Using the Illustris cosmological simulations, we investigate the relation between the…

Astrophysics of Galaxies · Physics 2019-10-30 E. Ventou , T. Contini , N. Bouché , B. Epinat , J. Brinchmann , H. Inami , J. Richard , I. Schroetter , G. Soucail , M. Steinmetz , P. Weilbacher

Cold accretion and quenching are closely related aspects of galaxy evolution, as sustained gas supply is required to maintain star formation. High-redshift galaxy groups therefore provide a valuable laboratory for testing how the thermal…

We measure the mass growth rate by merging for a wide range of galaxy types. We present the small-scale (0.014 < r < 11 h70^{-1} Mpc) projected cross-correlation functions w(rp) of galaxy subsamples from the spectroscopic sample of the NYU…

Astrophysics of Galaxies · Physics 2015-05-28 Tao Jiang , David W. Hogg , Michael R. Blanton

We examine the relation between surface brightness, velocity dispersion and size$-$the fundamental plane$-$for quiescent galaxies at intermediate redshifts in the COSMOS field. The COSMOS sample consists of $\sim150$ massive quiescent…

Astrophysics of Galaxies · Physics 2015-03-31 H. Jabran Zahid , Ivana Damjanov , Margaret Geller , Igor Chilingarian

In their evolution, star-forming galaxies are known to follow scaling relations between some fundamental physical quantities, such as the mass-metallicity and the main sequence relations. We aim at studying the evolution of galaxies that,…

Astrophysics of Galaxies · Physics 2020-10-14 E. Spitoni , F. Calura , M. Mignoli , R. Gilli , V. Silva Aguirre , A. Gallazzi

We present a detailed analysis of the structure and resolved stellar populations of simulated merger remnants, and compare them to observations of compact quiescent galaxies at z ~ 2. We find that major merging is a viable mechanism to…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-19 Stijn Wuyts , Thomas J. Cox , Christopher C. Hayward , Marijn Franx , Lars Hernquist , Philip F. Hopkins , Patrik Jonsson , Pieter G. van Dokkum

Although there has been much progress in understanding how galaxies evolve, we still do not understand how and when they stop forming stars and become quiescent. We address this by applying our galaxy spectral energy distribution models,…

We study the evolution of galaxies and the circumgalactic medium (CGM) through cosmic time by correlating $\sim50,000$ MgII absorbers, tracers of cool gas ($\sim10^{4}$~K), detected in the SDSS quasar spectra with galaxies detected in the…

Astrophysics of Galaxies · Physics 2020-07-15 Ting-Wen Lan
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