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We investigate how the specific star formation rates of galaxies of different masses depend on cluster-centric radius and on the central/satellite dichotomy in both field and cluster environments. Recent data from a variety of sources,…

星系天体物理 · 物理学 2015-05-14 Simone M. Weinmann , Guinevere Kauffmann , Anja von der Linden , Gabriella De Lucia

The degree of mass loss, i.e. the fraction of stars lost by globular clusters, and specifically by their different populations, is still poorly understood. Many scenarios of the formation of multiple stellar populations, especially the ones…

We introduce a new technique that uses galaxy clustering to constrain how satellite galaxies lose stellar mass and contribute to the diffuse "intrahalo light" (IHL). We implement two models that relate satellite galaxy stellar mass loss to…

宇宙学与河外天体物理 · 物理学 2015-06-03 Douglas F. Watson , Andreas A. Berlind , Andrew R. Zentner

Understanding the evolution of stellar clusters in an evolving tidal field is critical for studying the disruption of stellar clusters in a cosmological context. We systematically characterise the response of stellar clusters to tidal…

星系天体物理 · 物理学 2019-05-15 Jeremy J. Webb , Marta Reina-Campos , J. M. Diederik Kruijssen

We studied the effects of cluster environments on galactic structures by using the TNG50 cosmological simulation and observed galaxies in the Fornax cluster. We focused on galaxies with stellar masses of $10^{8-12}M_{\odot}$ at z=0 that…

We compile a large sample of nearby galaxies that are satellites of hosts using a well known SDSS group catalogue. From this sample, we create an `ancient infallers' and `recent infallers' subsample, based on the mean infall time predicted…

星系天体物理 · 物理学 2019-05-29 Rory Smith , Camilla Pacifici , Anna Pasquali , Paula Calderon-Castillo

Using tidal disruption of globular clusters by the galactic center, we put limits on the total mass ever enclosed into orbits of observed globular clusters. Under the assumption that the rate of mass loss from the Galaxy is steady, we then…

天体物理学 · 物理学 2009-11-10 Florian Dubath , Anna Rissone

We develop a new empirical methodology to study the relation between the stellar mass of galaxies and the mass of their host subhaloes. Our approach is similar to abundance matching, and is based on assigning a stellar mass to each subhalo…

宇宙学与河外天体物理 · 物理学 2015-05-27 Eyal Neistein , Cheng Li , Sadegh Khochfar , Simone M. Weinmann , Francesco Shankar , Michael Boylan-Kolchin

Using the latest cosmological hydrodynamic N-body simulations of groups and clusters, we study how location in phase-space coordinates at $z$$=$$0$ can provide information on environmental effects acting in clusters. We confirm the results…

We present preliminary results from a series of high-resolution N-body simulations that focus on 8 dark matter halos each of order a million particles within the virial radius. We follow the time evolution of hundreds of individually…

天体物理学 · 物理学 2007-05-23 Stuart P. D. Gill , Alexander Knebe , Brad K. Gibson

We examine the importance of secular stellar mass loss for fueling ongoing star formation in disk galaxies during the late stages of their evolution. For a galaxy of a given stellar mass, we calculate the total mass loss rate of its entire…

星系天体物理 · 物理学 2015-03-17 Samuel N. Leitner , Andrey V. Kravtsov

We investigate the mass loss of galaxies in groups and clusters with high-resolution DM simulations. We detect weak mass segregation in the inner regions of group/cluster haloes, consistent with observational findings. This applies to…

星系天体物理 · 物理学 2017-05-31 Gandhali D. Joshi , James Wadsley , Laura C. Parker

Using high resolution hydrodynamical cosmological simulations, we conduct a comprehensive study of how tidal stripping removes dark matter and stars from galaxies. We find that dark matter is always stripped far more significantly than the…

星系天体物理 · 物理学 2016-12-21 Rory Smith , Hoseung Choi , Jaehyun Lee , Jinsu Rhee , Ruben Sanchez-Janssen , Sukyoung K. Yi

We study the evolution of satellite galaxies in clusters of the \textsc{c-eagle} simulations, a suite of 30 high-resolution cosmological hydrodynamical zoom-in simulations based on the \textsc{eagle} code. We find that the majority of…

We report results of a large set of N-body calculations aimed to study the evolution of multi-mass star clusters in external tidal fields. Our clusters start with the same initial mass-functions, but varying particle numbers, orbital types…

天体物理学 · 物理学 2009-11-07 Holger Baumgardt , Junichiro Makino

We measure the star formation quenching efficiency and timescale in cluster environments. Our method uses N-body simulations to estimate the probability distribution of possible orbits for a sample of observed SDSS galaxies in and around…

星系天体物理 · 物理学 2016-09-07 Kyle A. Oman , Michael J. Hudson

We study the radial number density and stellar mass density distributions of satellite galaxies in a sample of 60 massive clusters at 0.04<z<0.26 selected from the Multi-Epoch Nearby Cluster Survey (MENeaCS) and the Canadian Cluster…

宇宙学与河外天体物理 · 物理学 2015-04-29 Remco F. J. van der Burg , Henk Hoekstra , Adam Muzzin , Cristóbal Sifón , Michael L. Balogh , Sean L. McGee

The environmental effect is commonly used to explain the excess of gas-poor galaxies in galaxy clusters. Meanwhile, the presence of gas-poor galaxies at cluster outskirts, where galaxies have not spent enough time to feel the cluster…

星系天体物理 · 物理学 2018-10-09 Seoyoung L. Jung , Hoseung Choi , O. Ivy Wong , Taysun Kimm , Aeree Chung , Sukyoung K. Yi

Current semi-analytic models (SAMs) of galaxy formation over-predict the fraction of passive small late-type satellite galaxies in dense environments by a factor of two to three. We hypothesize that this is due to inaccurate prescriptions…

宇宙学与河外天体物理 · 物理学 2015-05-20 Taysun Kimm , Sadegh Khochfar , Sukyoung Yi

In the first paper we presented 27 hydrodynamical cosmological simulations of galaxies with total masses between $5 \times 10^8$ and $10^{10}\,\mathrm{M}_\odot$. In this second paper we use a subset of these cosmological simulations as…

星系天体物理 · 物理学 2017-11-08 Jonas Frings , Andrea V. Macciò , Tobias Buck , Camilla Penzo , Aaron A. Dutton , Aura Obreja , Marvin Blank