使用不同RELXILL风味的PDKEEPAAA1915 +105的克尔假设检验
Tests of the Kerr hypothesis with GRS 1915+105 using different RELXILL flavors
摘要：
在以前的论文中，我们试图通过分析2012年的NuSTAR数据来测试GRS 1915+105中恒星质量黑洞的Kerr性质，使用我们的反射模型TRILL_NK。我们发现，反射分量的强度分布的选择是至关重要的，最终我们无法得到任何约束的时空度量周围的黑洞在GRS 1915+105。本文利用2007年的朱雀资料对同一震源进行了研究。我们确认，强度分布起着重要的作用，但现在我们发现相当严格的约束条件与克尔假设一致。与我们以前的研究的关键区别可能是较低的磁盘温度在朱雀观测和较高的能量分辨率附近的铁线的朱雀数据。我们还应用不同的ECOXILL风味（不同的描述的日冕光谱和可变盘电子密度）获得基本相同的结果。因此，我们的结论是，这种选择是不是很重要，我们的测试的克尔假设，而强度分布确实起着重要的作用，并与高质量的数据，它是可能的测量时空度规和强度分布。
英文摘要：
In a previous paper, we tried to test the Kerr nature of the stellar-mass black hole in GRS 1915+105 by analyzing NuSTAR data of 2012 with our reflection model RELXILL_NK. We found that the choice of the intensity profile of the reflection component is crucial and eventually we were not able to get any constraint on the spacetime metric around the black hole in GRS 1915+105. In the present paper, we study the same source with Suzaku data of 2007. We confirm that the intensity profile plays an important role, but now we find quite stringent constraints consistent with the Kerr hypothesis. The key differences with respect to our previous study are likely the lower disk temperature in the Suzaku observation and the higher energy resolution near the iron line of the Suzaku data. We also apply different RELXILL flavors (different descriptions of the coronal spectrum and variable disk electron density) obtaining essentially the same results. We thus conclude that this choice is not very important for our tests of the Kerr hypothesis while the intensity profile does play an important role, and that with high quality data it is possible to measure both the spacetime metric and the intensity profile.
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