论文标题
持续软状态源4U〜1957+11中的喷气功率上限严格的上限
The stringent upper limit on jet power in the persistent soft state source 4U~1957+11
论文作者
论文摘要
我们在4U〜1957+11的无线电发射上提出了极为深的上限，这是一种X射线二进制，通常被认为是一个持续的黑洞，几乎总是处于柔软状态。我们讨论了对I型爆发的更全面的搜索，而不是过去的工作，揭示了爆发率的上限，并加强了黑洞吸积的案例。在1.07 $ $ $ jy/beam噪声水平上缺乏该来源的检测表明，即使在无线电喷气式飞机生产的最极端薄磁盘模型中，喷气抑制也比预期的要强 - 此处的无线电功率比硬状态无线电/X射线相关性的外推要低1500--3700倍，这取决于较少的距离，这取决于较差的距离距离距离。我们还讨论了来源的位置和速度，并表明它必须在光环中形成或具有强大的不对称出生踢。
We present extremely deep upper limits on the radio emission from 4U~1957+11, an X-ray binary that is generally believed to be a persistently accreting black hole that is almost always in the soft state. We discuss a more comprehensive search for Type I bursts than in past work, revealing a stringent upper limit on the burst rate, bolstering the case for a black hole accretor. The lack of detection of this source at the 1.07 $μ$Jy/beam noise level indicates jet suppression that is stronger than expected even in the most extreme thin disk models for radio jet production -- the radio power here is 1500--3700 times lower than the extrapolation of the hard state radio/X-ray correlation, with the uncertainties depending primarily on the poorly constrained source distance. We also discuss the location and velocity of the source and show that it must have either formed in the halo or with a strong asymmetric natal kick.
