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相关论文: On the Size and Comoving Mass Density Evolution of…

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We determine the evolution of the co-moving density of the most massive ($M_* \geq 10^{12} M_\odot$) early-type galaxy population in the redshift range of $z = 0.15$ - 0.45 in different stellar mass ranges using data from the Sloan Digital…

宇宙学与河外天体物理 · 物理学 2011-01-04 Laszlo Dobos , Istvan Csabai

Strong size and internal density evolution of early-type galaxies between z~2 and the present has been reported by several authors. Here we analyze samples of nearby and distant (z~1) galaxies with dynamically measured masses in order to…

Spectroscopic + photometric redshifts, stellar mass estimates, and rest-frame colors from the 3D-HST survey are combined with structural parameter measurements from CANDELS imaging to determine the galaxy size-mass distribution over the…

The cumulative comoving number-density of galaxies as a function of stellar mass or central velocity dispersion is commonly used to link galaxy populations across different epochs. By assuming that galaxies preserve their number-density in…

The characteristic size of early-type galaxies (ETGs) of given stellar mass is observed to increase significantly with cosmic time, from redshift z>2 to the present. A popular explanation for this size evolution is that ETGs grow through…

星系天体物理 · 物理学 2019-08-14 C. Nipoti , T. Treu , M. W. Auger , A. S. Bolton

We report on the evolution of the number density and size of early-type galaxies from z~2 to z~0. We select a sample of 563 massive (M>10^{10} Msun), passively evolving (SSFR<10^{-2} Gyr^{-1}) and morphologically spheroidal galaxies at…

We combine HST/ACS imaging from the GEMS survey with redshifts and rest-frame quantities from COMBO-17 to study the evolution of morphologically early-type galaxies with red colors since z=1. We use a new large sample of 728 galaxies with…

[abridged] Massive, passively evolving galaxies at redshifts z>1 exhibit on the average physical sizes smaller by factors ~3 than local early type galaxies (ETGs) endowed with the same stellar mass. Small sizes are in fact expected on…

宇宙学与河外天体物理 · 物理学 2015-05-19 L. Fan , A. Lapi , A. Bressan , M. Bernardi , G. De Zotti , L. Danese

We use high-resolution K-band VLT/HAWK-I imaging over 0.25 square degrees to study the structural evolution of massive early-type galaxies since z~1. Mass-selected samples, complete down to log(M/M_sun)~10.7 such that `typical' L* galaxies…

宇宙学与河外天体物理 · 物理学 2012-12-20 Yu-Yen Chang , Arjen van der Wel , Hans-Walter Rix , Stijn Wuyts , Stefano Zibetti , Balasubramanian Ramkumar , Bradford P. Holden

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…

星系天体物理 · 物理学 2014-12-22 Lizhi Xie , Qi Guo , Andrew P. Cooper , Carlos S. Frenk , Ran Li , Liang Gao

We analyze 40 cosmological re-simulations of individual massive galaxies with present-day stellar masses of $M_{*} > 6.3 \times 10^{10} M_{\odot}$ in order to investigate the physical origin of the observed strong increase in galaxy sizes…

宇宙学与河外天体物理 · 物理学 2015-05-28 Ludwig Oser , Thorsten Naab , Jeremiah P. Ostriker , Peter H. Johansson

We present the analysis of a large sample of early-type galaxies (ETGs) at 0<z<3 aimed at tracing the cosmic evolution of their size and compare it with a model of pure dissipationless (dry) merging in the LambdaCDM framework. The effective…

宇宙学与河外天体物理 · 物理学 2015-06-04 A. Cimatti , C. Nipoti , P. Cassata

We introduce a framework for simultaneously investigating the structure and luminosity evolution of early-type gravitational lens galaxies. The method is based on the fundamental plane, which we interpret using the aperture mass-radius…

天体物理学 · 物理学 2009-11-10 D. Rusin , C. S. Kochanek

We measure the evolution in the intrinsic shape distribution of early-type galaxies from z~1 to z~0 by analyzing their projected axis-ratio distributions. We extract a low-redshift sample (0.04 < z < 0.08) of early-type galaxies with very…

宇宙学与河外天体物理 · 物理学 2015-05-30 Bradford Holden , Arjen van der Wel , Hans-Walter Rix , Marijn Franx

We report on a uniform comparative analysis of the fundamental parameters of early-type galaxies at z~1 down to a well defined magnitude limit (M_B\leq -20.0 in the field and M_B\leq -20.5 in the clusters). The changes in the M/L_B ratio…

天体物理学 · 物理学 2011-02-11 Sperello di Serego Alighieri , Barbara Lanzoni , Inger Jorgensen

Galaxy evolution can be studied observationally by linking progenitor and descendant galaxies through an evolving cumulative number density selection. This procedure can reproduce the expected evolution of the median stellar mass from…

星系天体物理 · 物理学 2017-05-31 Bart Clauwens , Allison Hill , Marijn Franx , Joop Schaye

We present the evolution of galaxy sizes, from redshift 2 to 0, for actively star forming and passive galaxies in the cosmological hydrodynamical 1003 cMpc3 simulation of the EAGLE project. We find that the sizes increase with stellar mass…

星系天体物理 · 物理学 2016-12-21 M. Furlong , R. G. Bower , R. A. Crain , J. Schaye , T. Theuns , J. W. Trayford , Y. Qu , M. Schaller , M. Berthet , J. C. Helly

We use semi-analytical modelling of galaxy formation to predict the redshift-size-evolution of elliptical galaxies. Using a simple model in which relative sizes of elliptical galaxies of a given mass correlate with the fraction of stars…

天体物理学 · 物理学 2011-02-11 Sadegh Khochfar , Joseph Silk

We perform dry merger simulations to investigate the role of dry mergers in the size growth of early-type galaxies in high density environments. We replace the virialized dark matter haloes obtained by a large cosmological $N$-body…

星系天体物理 · 物理学 2016-01-25 Taira Oogi , Asao Habe , Tomoaki Ishiyama

ABRIDGED: We study the evolution since z~1 of the rest-frame B luminosity function of the early-type galaxies (ETGs) in ~0.7 deg^2 in the COSMOS field. In order to identify ALL progenitors of local ETGs we construct the sample of high-z…

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