arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 2104.07042astro-ph.HE
收藏

瞬态X射线倾斜双星MAXI J1305-704中恒星质量黑洞的动力学证实

Dynamical confirmation of a stellar-mass black hole in the transient X-ray dipping binary MAXI J1305-704

D. Mata Sánchez, A. Rau, A. Álvarez Hernández, T. F. J. van Grunsven, M. A. P. Torres, P. G. Jonker

摘要:

根据MAXI J1305-704的X射线性质和爆发时的倾斜行为,它被认为是一个高倾角的候选黑洞X射线双星。我们提出的光度和光谱观测的来源在宁静,使我们能够揭示椭球调制的伴星和吸收功能与早期K型星(Teff = 4610 +130 -160 K)一致。吸收线的中心波长在Porb = 0.394 ± 0.004 d处周期性变化,振幅为K2 = 554 ± 8 km/s。它们暗示了致密天体的质量函数f(M1)= 6.9 +- 0.3 Msun,证实了它的黑洞性质。同时没有X射线食和存在倾角设定了一个保守的允许倾角范围60度< i < 82度,而光学光变曲线的建模进一步将其限制为i = 72 + 5 - 8度。上述参数共同确定了一个黑洞的质量为M1 = 8.9 + 1.6 - 1.0 Msun,伴星的质量为M2=0.43 +- 0.16 Msun,远低于观测到的光谱类型的矮星,意味着它是演化的。估计到系统的距离(d = 7.5 + 1.8 - 1.4 kpc)和空间速度(vspace = 270 +- 60 km/s)将其置于银河系厚盘中,并且如果超新星发生在银河系平面,则在BH形成期间支持显著的出生踢。

英文摘要:

MAXI J1305-704 has been proposed as a high-inclination candidate black hole X-ray binary in view of its X-ray properties and dipping behaviour during outburst. We present photometric and spectroscopic observations of the source in quiescence that allow us to reveal the ellipsoidal modulation of the companion star and absorption features consistent with those of an early K-type star (Teff = 4610 +130 -160 K). The central wavelengths of the absorption lines vary periodically at Porb = 0.394 +- 0.004 d with an amplitude of K2 = 554 +- 8 km/s . They imply a mass function for the compact object of f(M1) = 6.9 +- 0.3 Msun, confirming its black hole nature. The simultaneous absence of X-ray eclipses and the presence of dips set a conservative range of allowed inclinations 60 deg < i < 82 deg, while modelling of optical light curves further constrain it to i = 72 +5 -8 deg. The above parameters together set a black hole mass of M1 = 8.9 +1.6 -1.0 Msun and a companion mass of M2=0.43 +- 0.16 Msun, much lower than that of a dwarf star of the observed spectral type, implying it is evolved. Estimates of the distance to the system (d = 7.5 +1.8 -1.4 kpc) and space velocity (vspace = 270 +- 60 km/s ) place it in the Galactic thick disc and favour a significant natal kick during the formation of the BH if the supernova occurred in the Galactic Plane.

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。

↑