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We study the dependence of the galaxy contents within halos on the halo formation time using two galaxy formation models, one being a semianalytic model utilizing the halo assembly history from a high resolution N-body simulation and the…

Astrophysics · Physics 2010-08-19 Guangtun Zhu , Zheng Zheng , W. P. Lin , Y. P. Jing , Xi Kang , Liang Gao

The formation of the disk and feedback from supernova winds impacts the distribution of dark matter in galaxies. Recently, Di Cintio et al. (2014b) characterized the halo response from baryonic processes in hydrodynamical simulations via a…

Astrophysics of Galaxies · Physics 2016-05-19 Andrew B. Pace

We compare predictions of a number of empirical models and numerical simulations of galaxy formation to the conditional stellar mass functions (CSMF)of galaxies in groups of different masses obtained recently by Lan et al. to test how well…

Astrophysics of Galaxies · Physics 2016-10-12 Seunghwan Lim , Houjun Mo , Ting-Wen Lan , Brice Ménard

Motivated by the recently improved knowledge on the kinematic and chemical properties of the Galactic metal-poor stars, we present the numerical simulation for the formation of the Galactic stellar halo to interpret the observational…

Astrophysics · Physics 2009-10-31 Kenji Bekki , Masashi Chiba

The tight relationship between the stellar mass and halo mass of galaxies is one of the most fundamental scaling relations in galaxy formation and evolution. It has become a critical constraint for galaxy formation models. Over the past…

Astrophysics of Galaxies · Physics 2025-02-20 Kai Wang , Yingjie Peng

We employ the EAGLE hydrodynamical simulation to uncover the relationship between cluster environment and $\rm H_2$ content of star-forming galaxies at redshifts spanning $0\leq z\leq 1$. To do so, we divide the star-forming sample into…

Astrophysics of Galaxies · Physics 2023-05-31 Aditya Manuwal , Adam R. H. Stevens

We perform an extensive analysis of nonlinear and stochastic biasing of galaxies and dark halos in spatially flat low-density CDM universe using cosmological hydrodynamic simulations. We compare their biasing properties with the predictions…

Astrophysics · Physics 2009-10-16 Kohji Yoshikawa , Atsushi Taruya , Y. P. Jing , Yasushi Suto

We study the effects of applying observational techniques to derive the properties of simulated galaxies, with the aim of making an unbiased comparison between observations and simulations. For our study, we used fifteen galaxies simulated…

Astrophysics of Galaxies · Physics 2016-07-25 Giovanni Guidi , Cecilia Scannapieco , C. Jakob Walcher , Anna Gallazzi

Recent observations from integral field spectroscopy (IFS) indicate that the fraction of galaxies that are slow rotators, $F_{\rm SR}$, depends primarily on stellar mass, with no significant dependence on environment. We investigate these…

We present a quantitative analysis of the properties of galaxies and structures evolving in universes dominated by different modified gravitational models, including two variants of the f(R)-gravity (F) and two of the Dvali-Gabdadze-Poratti…

We use group size haloes identified with a ``friends of friends'' (FOF) algorithm in a concordance $\Lambda \rm{CDM}$ GADGET2 (dark matter only) simulation to investigate the dependence of halo properties on the environment at $z=0$. The…

Astrophysics · Physics 2008-11-26 Cinthia Ragone-Figueroa , Manolis Plionis

The fraction of galaxies with red colours depends sensitively on environment, and on the way in which environment is measured. To distinguish competing theories for the quenching of star formation, a robust and complete description of…

Cosmology and Nongalactic Astrophysics · Physics 2013-12-06 Stefanie Phleps , David J. Wilman , Stefano Zibetti , Tamás Budavári

We determine what aspects of the density field surrounding galaxies most affect their properties. For Sloan Digital Sky Survey galaxies, we measure the group environment, meaning the host group luminosity and the distance from the group…

Astrophysics · Physics 2011-02-11 Michael R. Blanton , Andreas A. Berlind , David W. Hogg

Based on a set of cosmological N-body simulations we analyze properties of the dark matter haloes (DM) in a galaxy mass range ($10^{11} - 10^{13} h^{-1}M_{\odot}$) in modified $\lcdm$ cosmology with additional dynamically screened scalar…

Cosmology and Nongalactic Astrophysics · Physics 2010-08-31 Wojciech A. Hellwing

We perform cosmological hydrodynamic simulations to determine to what extent galaxies lose their gas due to photoheating from an ionizing background. We find that the characteristic mass at which haloes on average have lost half of their…

Astrophysics · Physics 2008-10-31 Takashi Okamoto , Liang Gao , Tom Theuns

We simultaneously present constraints on the stellar-to-halo mass relation for central and satellite galaxies through a weak lensing analysis of spectroscopically classified galaxies. Using overlapping data from the fourth data release of…

We present measurements of galactic outflow rates from the EAGLE suite of cosmological simulations. We find that gas is removed from the interstellar medium (ISM) of central galaxies with a dimensionless mass loading factor that scales…

Astrophysics of Galaxies · Physics 2020-04-15 Peter D. Mitchell , Joop Schaye , Richard G. Bower , Robert A. Crain

We study the formation and evolution of ring galaxies in the Evolution and Assembly of GaLaxies and their Environments (EAGLE) simulations. We use the largest reference model Ref-L100N1504, a cubic cosmological volume of 100 comoving…

We study the properties of gas inside and around galaxy haloes as a function of radius and halo mass, focussing mostly on z=2, but also showing some results for z=0. For this purpose, we use a suite of large cosmological, hydrodynamical…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-03 Freeke van de Voort , Joop Schaye

We investigate the influence of the initial proto-galaxies over-densities and masses on their evolution, to understand whether the internal properties of the proto-galactic haloes are sufficient to account for the varied properties of the…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-04 Emiliano Merlin , Cesare Chiosi , Lorenzo Piovan , Tommaso Grassi , Umberto Buonomo , Francesco La Barbera
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