NGC 147, NGC 185 and CassII: a genetic approach to orbital properties, star formation and tidal debris
NGC 147, NGC 185 and CassII: a genetic approach to orbital properties, star formation and tidal debris
复制标题
NGC 147、NGC 185 和 CassII:轨道特性、恒星形成和潮汐碎片的遗传方法
DOI:
10.1093/mnras/stv2781
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发表时间:
2015
影响因子:
4.8
通讯作者:
Arias V
中科院分区:
文献类型:
--
作者:
Arias V
NGC 147, NGC 185 and Cassiopeia II (CassII) have similar positions in the sky, distances and measured line-of-sight velocities. This proximity in phase space suggests that these three satellites of M31 form a subgroup within the Local Group. Nevertheless, the differences in their star formation history and interstellar medium, and the recent discovery of a stellar stream in NGC 147, combined with the lack of tidal features in the other two satellites, are all indications of complex and diverse interactions between M31 and these three satellites. We use a genetic algorithm to explore the different orbits that these satellites can have and select six sets of orbits that could best explain the observational features of the NGC 147, NGC 185 and CassII satellites. The parameters of these orbits are then used as a starting point forN-body simulations. We present models for which NGC 147, NGC 185 and CassII are a bound group for a total time of at least 1 Gyr but still undergo different interactions with M31 and as a result NGC 147 has a clear stellar stream, whereas the other two satellites have no significant tidal features. This result shows that it is possible to find solutions that reproduce the contrasting properties of the satellites and for which NGC 147-NGC 185-CassII have been gravitationally bound.
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影响因子:
4.8
作者:
L. Sales;Wenting Wang;S. White;J. Navarro
通讯作者:
J. Navarro
影响因子:
4.8
作者:
Laura L. Watkins;N. Wyn Evans;Glenn van de Ven
通讯作者:
Glenn van de Ven
DOI:
10.1088/0004-637x/768/2/172
发表时间:
2013-02
期刊:
The Astrophysical Journal
影响因子:
--
作者:
M. Collins;S. Chapman;R. Rich;R. Ibata;N. Martin;N. Martin;M. Irwin;N. Bate;G. Lewis;J. Peñarrubia;J. Peñarrubia;N. Arimoto;N. Arimoto;C. Casey;A. Ferguson;A. Koch;A. McConnachie;N. Tanvir
通讯作者:
M. Collins;S. Chapman;R. Rich;R. Ibata;N. Martin;N. Martin;M. Irwin;N. Bate;G. Lewis;J. Peñarrubia;J. Peñarrubia;N. Arimoto;N. Arimoto;C. Casey;A. Ferguson;A. Koch;A. McConnachie;N. Tanvir
影响因子:
6.5
作者:
M. Bellazzini;T. Oosterloo;F. Fraternali;G. B. INAF-OABo;Astron;Dwingeloo;K. Inst.;Groningen;DIFA- Bologna Univ.;ESO-Chile
通讯作者:
M. Bellazzini;T. Oosterloo;F. Fraternali;G. B. INAF-OABo;Astron;Dwingeloo;K. Inst.;Groningen;DIFA- Bologna Univ.;ESO-Chile
DOI:
--
发表时间:
1993
期刊:
影响因子:
--
作者:
M. Lee;W. Freedman;B. Madore
通讯作者:
B. Madore