论文标题
X射线源的几何形状1H 0707-495
Geometry of the X-ray source 1H 0707-495
论文作者
论文摘要
我们研究了从增生盘的相对涂片反射的形状确定的1H 0707-495中X射线源的大小和位置的约束。我们开发了一个新的代码来建模扩展的X射线源，并将其应用于1H 0707-495的所有档案XMM观测值。与Wilkins等人相反。我们发现，该来源中的相对论反射与扩展的均匀电晕不一致。取而代之的是，我们发现X射线源必须非常紧凑，大小最多为重力半径，最多位于黑洞地平线的几个重力半径。统一的延伸电晕确实产生了发射率，就像是两倍的功率定律，但是内部发射率是由源几何形状固定的，而不是自由参数。在1H0707-495中，内部光盘的反射比均匀扩展的源的预期要强得多。包括风的电离吸收的影响不会改变这一结论，而包括风的散射发射（和更复杂的吸收）可以极大地改变反射参数。
We investigate constraints for the size and location of the X-ray source in 1H 0707-495 determined from the shape of the relativistically smeared reflection from the accretion disc. We develop a new code to model an extended X-ray source and we apply it to all archival XMM observations of 1H 0707-495. Contrary to Wilkins et al. we find that the relativistic reflection in this source is not consistent with an extended uniform corona. Instead, we find that the X-ray source must be very compact, with the size of at most a gravitational radius, and located at most at a few gravitational radii from the black hole horizon. A uniform extended corona does indeed produce an emissivity which is like a twice broken power law, but the inner emissivity is fixed by the source geometry rather than being a free parameter. In 1H0707-495, reflection from the inner disc is much stronger than expected for a uniformly extended source. Including the effect of ionised absorption from a wind does not change this conclusion, but including scattered emission (and more complex absorption) from the wind can dramatically change the reflection parameters.
