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相关论文: Evolution of Low Mass Galactic Subhalos and Depend…

200 篇论文

We analyzed the statistics of subhalo abundance of galaxy-sized and giant-galaxy-sized halos formed in a high-resolution cosmological simulation of a 46.5Mpc cube with the uniform mass resolution of $10^6 M_{\odot}$. We analyzed all halos…

天体物理学 · 物理学 2014-11-18 Tomoaki Ishiyama , Toshiyuki Fukushige , Junichiro Makino

Models for the formation and growth of structure in a cold dark matter dominated universe predict that galaxy halos should contain significant substructure. Studies of the Milky Way, however, have yet to identify the expected few hundred…

天体物理学 · 物理学 2009-11-07 R. A. Ibata , G. F. Lewis , M. J. Irwin

In Paper I we used the CUSP formalism to derive from first principles and no single free parameter the accurate abundance and radial distribution of both diffuse DM (dDM) and subhaloes accreted onto haloes and their progenitors at all…

宇宙学与河外天体物理 · 物理学 2021-10-06 Eduard Salvador-Solé , Alberto Manrique , Ignacio Botella

We model the time evolution of gaps in tidal streams caused by the impact of a dark matter subhalo, while both orbit a spherical gravitational potential. To this end, we make use of the simple behaviour of orbits in action-angle space. A…

星系天体物理 · 物理学 2016-09-07 Amina Helmi , Helmer H. Koppelman

We study the evolution of the halo-halo correlation function and bias in a LCDM model using very high-resolution N-body simulations. The high force and mass resolution allows dark matter (DM) halos to survive in the tidal fields in…

天体物理学 · 物理学 2007-05-23 Andrey Kravtsov , Anatoly Klypin , Pedro Colin , Alexei Khokhlov

Star-planet interactions must be taken into account in stellar models to understand the dynamical evolution of close-in planets. The dependence of the tidal interactions on the structural and rotational evolution of the star is of peculiar…

地球与行星天体物理 · 物理学 2017-08-23 Florian Gallet , Emeline Bolmont , Stéphane Mathis , Corinne Charbonnel , Louis Amard

The research of infall motion is a common means to study molecular cloud dynamics and the early process of star formation. Many works had been done in-depth research on infall. We searched the literature related to infall study of molecular…

星系天体物理 · 物理学 2022-09-14 Shuling Yu , Zhibo Jiang , Yang Yang , Zhiwei Chen , Haoran Feng

We investigate how the orbital evolution and mass distribution of infalling satellite galaxies shape the phase-space and radial distributions of intracluster light (ICL) relative to the underlying cluster dark matter (DM) halo. Using N-body…

星系天体物理 · 物理学 2026-04-10 G Martin , F R Pearce , N A Hatch , H J Brown , J Butler , Y M Bahe , W Cui , Y Dubois , A Knebe

Understanding the evolution of scaling relations between the observable properties of clusters and their total mass is key to realizing their potential as cosmological probes. In this study, we investigate whether the evolution of cluster…

宇宙学与河外天体物理 · 物理学 2015-06-16 Benedikt Diemer , Andrey V. Kravtsov , Surhud More

We use cosmological LCDM numerical simulations to model the evolution of the substructure population in sixteen dark matter haloes with resolutions of up to seven million particles within the virial radius. The combined substructure…

天体物理学 · 物理学 2008-11-26 Darren Reed , Fabio Governato , Thomas Quinn , Jeffrey Gardner , Joachim Stadel , George Lake

In the hierarchical formation model, galaxy clusters grow by accretion of smaller groups or isolated galaxies. During the infall into the centre of a cluster, the properties of accreted galaxies change. In particular, both observations and…

We explore the mass content of galaxies residing in galaxy clusters at z=0 in the EAGLE hydrodynamical simulation as well as the galaxies' mass build-up through cosmic time. We use a galaxy catalogue generated with the HBT+ algorithm, which…

星系天体物理 · 物理学 2024-06-12 Cristóbal Sifón , Jiaxin Han

A live halo plays an active role in the formation and evolution of bars by participating in the angular momentum redistribution which drives the dynamical evolution. Angular momentum is emitted mainly by near-resonant material in the bar…

天体物理学 · 物理学 2009-11-11 E. Athanassoula

Late-type galaxies falling into a cluster would evolve being influenced by the interactions with both the cluster and the nearby cluster member galaxies. Most numerical studies, however, tend to focus on the effects of the former with…

星系天体物理 · 物理学 2018-04-18 Jeong-Sun Hwang , Changbom Park , Arunima Banerjee , Ho Seong Hwang

We model the evolution of the mean galaxy occupation of dark-matter halos over the range $0.1<z<1.3$, using the data from the VIMOS-VLT Deep Survey (VVDS). The galaxy projected correlation function $w_p(r_p)$ was computed for a set of…

We quantify the evolution of the spiral, S0 and elliptical fractions in galaxy clusters as a function of cluster velocity dispersion ($\sigma$) and X-ray luminosity ($L_X$) using a new database of 72 nearby clusters from the WIde-Field…

Simulations of tidal streams show that close encounters with dark matter subhalos induce density gaps and distortions in on-sky path along the streams. Accordingly, observing disrupted streams in the Galactic halo would substantiate the…

星系天体物理 · 物理学 2017-07-26 Emily Sandford , Andreas H. W. Kuepper , Kathryn V. Johnston , Juerg Diemand

We analyze with hydrodynamical simulations the evolution of galaxy clusters in a cosmological environment. Power ratios (Buote \& Tsai 1995) are used to quantitatively relate cluster morphologies to their dynamical states. The simulated…

天体物理学 · 物理学 2015-06-24 John C. Tsai , David A. Buote

At a fixed halo mass, galaxy clusters with higher magnitude gaps have larger brightest central galaxy (BCG) stellar masses. Recent studies have shown that by including the magnitude gap ($\rm m_{gap}$) as a latent parameter in the stellar…

星系天体物理 · 物理学 2019-06-12 Jesse B. Golden-Marx , Christopher J. Miller

We construct an analytical model of the mass distribution function of subhalos in a galaxy cluster in the context of the cold dark matter (CDM) theory. Our model takes account of two important effects; the high density of the precluster…

天体物理学 · 物理学 2009-11-07 Yutaka Fujita , Craig L. Sarazin , Masahiro Nagashima , Taihei Yano