Morphological evolution of discs in clusters

被引:185
作者
Mastropietro, C [1 ]
Moore, B
Mayer, L
Debattista, VP
Piffaretti, R
Stadel, J
机构
[1] Univ Zurich, Inst Theoret Phys, CH-8057 Zurich, Switzerland
[2] Univ Washington, Dept Astron, Seattle, WA 98195 USA
[3] ETH, Inst Astron, CH-8093 Zurich, Switzerland
[4] Univ Innsbruck, Inst Astrophys, A-6020 Innsbruck, Austria
关键词
methods : N-body simulations; galaxies : clusters : general; galaxies : dwarf; galaxies : evolution;
D O I
10.1111/j.1365-2966.2005.09579.x
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
The recent discovery of hidden non-axisymmetric and disc-like structures in bright Virgo dwarf elliptical and lenticular galaxies (dE/dSph/dS0) indicates that they may have late-type progenitors. Using N-body simulations we follow the evolution of disc galaxies within a Lambda cold dark matter (Lambda CDM) cluster simulated with 10(7) particles, where the hierarchical growth and galaxy harassment are modelled self-consistently. Most of the galaxies undergo significant morphological transformation, even at the outskirts of the cluster, and move through the Hubble sequence from late-type discs to dwarf spheroidals. None of the discs is completely destroyed, therefore they cannot be the progenitors of ultracompact dwarf (UCD) galaxies. The time evolution of the simulated galaxies is compared with unsharp masked images obtained from Very Large Telescope (VLT) data and the projected kinematics of our models with the latest high-resolution spectroscopic studies from the Keck and Palomar telescopes.
引用
收藏
页码:607 / 619
页数:13
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