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We present a study of galaxy environments to z~2, based on a sample of over 33,000 K-band selected galaxies detected in the UKIDSS Ultra Deep Survey (UDS). The combination of infrared depth and area in the UDS allows us to extend previous…

宇宙学与河外天体物理 · 物理学 2015-05-20 R. W. Chuter , O. Almaini , W. G. Hartley , R. J. McLure , J. S. Dunlop , S. Foucaud , C. J. Conselice , C. Simpson , M. Cirasuolo , E. J. Bradshaw

We use a disk galaxy evolution model to investigate whether galaxies with exponential surface brightness profiles can be produced in a cosmologically motivated framework for disk galaxy formation. Our model follows the accretion, cooling,…

天体物理学 · 物理学 2009-06-09 Aaron A. Dutton

We use the galaxy stellar mass and halo merger tree information from the semi-analytic model galaxy catalogue of Font et al. (2009) to examine the accretion of galaxies into a large sample of groups and clusters, covering a wide range in…

宇宙学与河外天体物理 · 物理学 2015-05-13 Sean L. McGee , Michael L. Balogh , Richard G. Bower , Andreea S. Font , Ian G. McCarthy

We consider a thickness of stellar disks of late-type galaxies by analyzing the R and K_s band photometric profiles for two independent samples of edge-on galaxies. The main goal is to verify a hypotesis that a thickness of old stellar…

天体物理学 · 物理学 2009-11-07 A. V. Zasov , D. V. Bizyaev , D. I. Makarov , N. V. Tyurina

Using the third data release of the Sloan Digital Sky Survey (SDSS) we have rigorously defined a volume limited sample of early-type galaxies in the redshift range z < 0.1. We have defined the density of the local environment for each…

天体物理学 · 物理学 2009-11-11 M. S. Clemens , A. Bressan , B. Nikolic , P. Alexander , F. Annibali , R. Rampazzo

We build on a recent photometric decomposition analysis of 7506 Galaxy and Mass Assembly (GAMA) survey galaxies to derive stellar mass function fits to individual spheroid and disk component populations down to a lower mass limit of…

The growth-rate and the internal dynamics of galaxy-sized dark-matter haloes depend on their location within the cosmic web. Haloes that sit at the nodes grow in mass till the present time and are dominated by radial orbits. Conversely,…

星系天体物理 · 物理学 2017-06-21 Emilio Romano-Diaz , Enrico Garaldi , Mikolaj Borzyszkowski , Cristiano Porciani

We examine the relationship between the mass of present-day central supermassive black holes (SMBHs, $M_{\rm BH}$), and the stellar mass ($M_{\star}$) and halo mass ($M_{200}$) of their host galaxies in the EAGLE simulation, and find that…

星系天体物理 · 物理学 2026-04-09 Ryan J. Roberts , Jonathan J. Davies , Robert A. Crain

The mass and structural assembly of galaxies is a matter of intense debate. Current theoretical models predict the existence of a linear relationship between galaxy size ($R_e$) and the host dark matter halo virial radius ($R_h$).\\ By…

The environment within dark matter haloes can quench the star formation of galaxies. However, environmental effects beyond the virial radius of haloes ($\gtrsim$ 1 Mpc) are less evident. An example is the debated correlation between colour…

Aims. We investigate the environmental dependence of the stellar mass fundamental plane (FP$_*$) using the early-type galaxy sample from the Sloan Digital Sky Survey Data Release 7 (SDSS DR7). Methods. The FP$_*$ is calculated by replacing…

星系天体物理 · 物理学 2016-03-16 Lei Hou , Yu Wang

We have used deep, HST, near-IR imaging to study the morphological properties of the most massive galaxies at high z, modelling the WFC3/IR H-band images of the ~200 galaxies in the CANDELS-UDS field with 1 < z_phot < 3, and stellar masses…

Using two volume-limited Main galaxy samples of the Sloan Digital Sky Survey Data Release 10 (SDSS DR10), I investigate the environmental dependence of galaxy age, and get the same conclusions in two volume-limited Main galaxy samples: old…

星系天体物理 · 物理学 2014-10-09 Xin-Fa Deng

We use a serendipitously discovered overdensity of extremely red objects (EROs) to study the morphologies and cumulative surface number density of EROs in a dense environment. Our extremely deep imaging allows us to select very faint EROs,…

We explore the interrelationships between the galaxy group halo mass and various observable group properties. We propose a simple scenario that describes the evolution of the central galaxies and their host dark matter halos. Star formation…

星系天体物理 · 物理学 2019-08-21 Zhong-yi Man , Ying-jie Peng , Jing-jing Shi , Xu Kong , Cheng-peng Zhang , Jing Dou , Ke-xin Guo

We report high quality, Halpha or CO rotation curves (RCs) to several Re for 41 large, massive, star-forming disk galaxies (SFGs), across the peak of cosmic galaxy evolution (z~0.67-2.45), taken with the ESO-VLT, the LBT and IRAM-NOEMA.…

Massive gas-rich galaxy discs at $z \sim 1-3$ host massive star-forming clumps with typical baryonic masses in the range $10^7-10^8$~M$_{\odot}$ which can affect the orbital decay and concurrent growth of supermassive black hole (BH) pairs.…

星系天体物理 · 物理学 2016-10-12 Valentina Tamburello , Pedro R. Capelo , Lucio Mayer , Jillian M. Bellovary , James Wadsley

We present a dynamical model for the formation and evolution of a massive disk galaxy, within a growing dark halo whose mass evolves according to cosmological simulations of structure formation. The galactic evolution is simulated with a…

天体物理学 · 物理学 2009-11-07 Markus Samland , Ortwin Gerhard

We present optical spectroscopy and deep optical/near-IR photometry of 4 luminous metal-poor blue compact galaxies (BCGs) and two of their companions. With the aid of spectral evolutionary models (SEMs) and structural parameters derived…

天体物理学 · 物理学 2007-05-23 N. Bergvall , G. Ostlin

At z=0, clusters are primarily populated by red, elliptical and massive galaxies, while blue, spiral and lower-mass galaxies are common in low-density environments. Understanding how and when these differences were established is of…

宇宙学与河外天体物理 · 物理学 2015-05-20 David Sobral , Philip Best , Ian Smail , Jim Geach , HiZELS team
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