arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1011.2647astro-ph.GA
收藏

巨椭圆星系3C 66 B中的一个非常近距离双星黑洞及其黑洞合并

A Very Close Binary Black Hole in a Giant Elliptical Galaxy 3C 66B and its Black Hole Merger

Satoru Iguchi, Takeshi Okuda, Hiroshi Sudou

备注：
5 pages, 4 figures. Accepted for publication in The Astrophysical Journal Letters
发表信息：
Astrophysical Journal, vol.724, L166, 2010
阅读 PDF
arXiv 页面 ↗HTML 原文 ↗

摘要：

最近的观测结果提供了可能的证据，表明巨星系中心存在双星黑洞（BBH），并可能在其演化过程中合并形成超大质量黑洞。我们首先检测到一个周期的$93\pm1$天周期流量变化的3毫米监测观测的一个巨大的椭圆星系\object{3C 66B}的轨道运动周期为$1.05\pm0.03$年已经观察到。检测到的信号周期短于轨道周期可以通过考虑由于BBH的轨道运动引起的多普勒频移调制来解释。假设BBH有一个圆形的轨道，喷流轴平行于双星的角动量，我们的观测结果表明，存在一个非常接近的BBH，其双星轨道的轨道周期为$1.05\pm0.03$年，轨道半径为$(3.9\pm1.0) \times 10^{-3}$ pc，轨道间隔为$(6.1^{+1.0}_{-0.9}) \times 10^{-3}$ pc，$(1.2^{+0.5}_{-0.2}) \times 10^9$ $M_{\sun}$的黑洞质量较大，$(7.0^{+4.7}_{-6.4}) \times 10^8$ $M_{\sun}$的黑洞质量较小。$(5.1^{+60.5}_{-2.5})\times 10^2$年的BBH衰变时间为黑洞合并的发生提供了证据。这封信将展示黑洞碰撞在演化过程中形成超大质量黑洞的有趣可能性，这是宇宙中最壮观的自然现象之一。

英文摘要：

Recent observational results provide possible evidence that binary black holes (BBHs) exist in the center of giant galaxies and may merge to form a supermassive black hole in the process of their evolution. We first detected a periodic flux variation on a cycle of $93\pm1$ days from the 3-mm monitor observations of a giant elliptical galaxy \object{3C 66B} for which an orbital motion with a period of $1.05\pm0.03$ years had been already observed. The detected signal period being shorter than the orbital period can be explained by taking into consideration the Doppler-shifted modulation due to the orbital motion of a BBH. Assuming that the BBH has a circular orbit and that the jet axis is parallel to the binary angular momentum, our observational results demonstrate the presence of a very close BBH that has the binary orbit with an orbital period of $1.05\pm0.03$ years, an orbital radius of $(3.9\pm1.0) \times 10^{-3}$ pc, an orbital separation of $(6.1^{+1.0}_{-0.9}) \times 10^{-3}$ pc, the larger black hole mass of $(1.2^{+0.5}_{-0.2}) \times 10^9$ $M_{\sun}$, and the smaller black hole mass of $(7.0^{+4.7}_{-6.4}) \times 10^8$ $M_{\sun}$. The BBH decay time of $(5.1^{+60.5}_{-2.5})\times 10^2$ years provides evidence for the occurrence of black hole mergers. This Letter will demonstrate the interesting possibility of black hole collisions to form a supermassive black hole in the process of evolution, one of the most spectacular natural phenomena in the universe.

机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。

↑