High-velocity stars as a result of encounters between stars and massive binary black holes in galactic nuclei |
| |
| Authors: | S V Zhuiko V V Orlov K S Shirokova |
| |
| Institution: | 1.Sternberg Astronomical Institute,Lomonosov Moscow State University,Moscow,Russia;2.St. Petersburg State University,Petrodvorets,Russia;3.Central (Pulkovo) Astronomical Observatory,Russian Academy of Sciences,St. Petersburg,Russia |
| |
| Abstract: | Numerical simulations of the motions of stars in the gravitational fields of binary black holes with various component mass ratios have been carried out. Two models are considered: (1) the two-body problem with two fixed centers; (2) the general three-body problem. The first model is applicable only over short times Δt ? T, where T is the period of the binary system. The second model is applicable at all times except for during close encounters of stars with one of the binary components, r ≤ 0.00002 pc, where r is the distance from the star to the nearer black hole. In very close passages, relativistic corrections must be taken into account. Estimates of the probability of formation of high-velocity stars as a result of such interactions are obtained. It is shown that this mechanism is not suitable for the nucleus of our Galaxy due to the probable absence of a second massive black hole in the central region of the Galaxy. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
