The Galactic Centre source G2 was unlikely born in any of the known massive binaries
The Galactic Centre source G2 was unlikely born in any of the known massive binaries
复制标题
银河中心源 G2 不太可能诞生于任何已知的大质量双星中
DOI:
10.1093/mnras/sty1330
复制
发表时间:
2018
影响因子:
4.8
通讯作者:
Habibi
中科院分区:
文献类型:
--
作者:
Calderón;Cuadra;Schartmann;Burkert;Eisenhauer;Habibi
The source G2 has already completed its pericentre passage around Sgr A*, the supermassive black hole in the centre of our Galaxy. Although it has been monitored for 15 yr, its astrophysical nature and origin still remain unknown. In this work, we aim to test the hypothesis of G2 being the result of a stellar wind collision. To do so, we study the motion and final fate of gas clumps formed as a result of collisions of stellar winds in massive binaries. Our approach is based on a test-particle model in order to describe the trajectories of such clumps. The model takes into account the gravitational field of Sgr A*, the interaction of the clumps with the interstellar medium as well as their finite lifetimes. Our analysis allows us to reject the hypothesis based on four arguments:(i) if G2 has followed a purely Keplerian orbit since its formation, it cannot have been produced in any of the known massive binaries since their motions are not consistent,(ii) in general, gas clumps are evaporated through thermal conduction on very short timescale () before getting close enough to Sgr A*, (iii) IRS 16SW, the best candidate for the origin of G2, cannot generate clumps as massive as G2, and (iv) clumps ejected from IRS 16SW describe trajectories significantly different to the observed motion of G2.
登录
查看更多内容
DOI:
10.1088/0004-637x/750/1/58
发表时间:
2012-01
期刊:
The Astrophysical Journal
影响因子:
--
作者:
A. Burkert;M. Schartmann;C. Alig;S. Gillessen;R. Genzel;T. Fritz;F. Eisenhauer
通讯作者:
A. Burkert;M. Schartmann;C. Alig;S. Gillessen;R. Genzel;T. Fritz;F. Eisenhauer
DOI:
10.1111/j.1365-2966.2009.14857.x
发表时间:
2009
影响因子:
4.8
作者:
J. Pittard
通讯作者:
J. Pittard
DOI:
10.1088/0004-637x/756/1/86
发表时间:
2012
期刊:
The Astrophysical Journal
影响因子:
--
作者:
J. Miralda
通讯作者:
J. Miralda
DOI:
10.1088/0004-637x/776/1/13
发表时间:
2013
期刊:
The Astrophysical Journal
影响因子:
--
作者:
A. Ballone;M. Schartmann;A. Burkert;S. Gillessen;R. Genzel;T. Fritz;F. Eisenhauer;O. Pfuhl;T. Ott
通讯作者:
T. Ott
DOI:
--
发表时间:
2011
期刊:
影响因子:
--
作者:
A. Lamberts;S. Fromang;G. Dubus
通讯作者:
G. Dubus