Dark-matter-deficient galaxies in hydrodynamical simulations
Dark-matter-deficient galaxies in hydrodynamical simulations
复制标题
流体动力学模拟中缺乏暗物质的星系
DOI:
10.1093/mnras/stz1839
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发表时间:
2018-11
影响因子:
4.8
通讯作者:
Gao Liang
中科院分区:
文献类型:
--
作者:
Jing Yingjie;Wang Chunxiang;Li Ran;Liao Shihong;Wang Jie;Guo Qi;Gao Liang
Low-mass galaxies are expected to be dark-matter-dominated even within their central regions. Recently, two observations reported two dwarf galaxies in a group environment with very little dark matter in their central regions. We explore the population and origins of dark-matter-deficient galaxies (DMDGs) using two state-of-the-art hydrodynamical simulations, the EAGLE and Illustris projects. For all satellite galaxies with 109 < M* < 1010 M$\odot$ in groups with M200 > 1013 M$\odot$, we find that about $2.6\, {\rm per\, cent}$ of them in EAGLE, and $1.5\, {\rm per\, cent}$ in Illustris are DMDGs with dark matter fractions below $50\, {\rm per\, cent}$ inside two times the half-stellar-mass radius. We demonstrate that DMDGs are highly tidally disrupted galaxies, and that because dark matter has a higher binding energy than stars, mass loss of the dark matter is much more rapid than that of stars in DMDGs during tidal interactions. If DMDGs were confirmed in observations, they are expected in current galaxy formation models.
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DOI:
10.1111/j.1365-2966.2005.09238.x
发表时间:
2004-11
影响因子:
4.8
作者:
V. Springel;T. Matteo;L. Hernquist
通讯作者:
V. Springel;T. Matteo;L. Hernquist
影响因子:
4.8
作者:
Dutton, Aaron A.;Maccio, Andrea V.
通讯作者:
Maccio, Andrea V.
影响因子:
4.8
作者:
D. Sijacki;M. Vogelsberger;S. Genel;V. Springel;P. Torrey;G. Snyder;D. Nelson;Lars Hernquist IoAKICC-Lars-Hernquist-Io
通讯作者:
D. Sijacki;M. Vogelsberger;S. Genel;V. Springel;P. Torrey;G. Snyder;D. Nelson;Lars Hernquist IoAKICC-Lars-Hernquist-Io
DOI:
10.1016/j.ascom.2015.09.003
发表时间:
2015-04
期刊:
Astron. Comput.
影响因子:
--
作者:
D. Nelson;A. Pillepich;S. Genel;M. Vogelsberger;V. Springel;P. Torrey;V. Rodriguez-Gomez;D. Sijacki-D.-S
通讯作者:
D. Nelson;A. Pillepich;S. Genel;M. Vogelsberger;V. Springel;P. Torrey;V. Rodriguez-Gomez;D. Sijacki-D.-S
DOI:
10.1111/j.1365-2966.2009.15715.x
发表时间:
2009-01
影响因子:
4.8
作者:
V. Springel
通讯作者:
V. Springel