论文标题
使用X射线连续拟合来估计Maxi J1305-704的旋转
Using X-ray continuum-fitting to estimate the spin of MAXI J1305-704
论文作者
论文摘要
Maxi J1305-704是带有黑洞主要的瞬态X射线二进制。它于2012年4月9日在其唯一已知的爆发中发现。 Maxi J1305-704也是一个高倾斜度的低质量X射线二进制，其光曲线中具有突出的倾角特征，因此我们检查了92 \ emph {swift}/xrt连续观察的完整目录，对Maxi J1305-704进行了连续观察，仅集中在稳定的光谱上。 We select 13 ``gold" spectra for which the root mean square RMS <0.075 and the coronal scattered fraction $f_{\mathrm{sc}} \lesssim 25 \%$. These ``gold" data are optimal thermal-state observations for continuum-fitting modeling, in which the disk extends to the innermost-stable circular orbit and is geometrically thin.以前，黑洞旋转是未知的。通过使用相对论薄磁盘模型\ texttt {kerrbb2}利用X射线连续拟合方法并提供已知的动态二进制系统参数，我们发现Maxi J1305-704具有适度的旋转（$ a _ _ {*} = 0.87 _ {0.87 _ { - 0.87 _ { - 0.13 _ { - 0.13}^eTLECT这是Maxi J1305-704旋转的首次确定。
MAXI J1305-704 is a transient X-ray binary with a black hole primary. It was discovered on April 9, 2012, during its only known outburst. MAXI J1305-704 is also a high inclination low-mass X-ray binary with prominent dip features in its light curves, so we check the full catalog of 92 \emph{Swift}/XRT continuous observations of MAXI J1305-704, focusing only on the stable spectra. We select 13 ``gold" spectra for which the root mean square RMS <0.075 and the coronal scattered fraction $f_{\mathrm{sc}} \lesssim 25 \%$. These ``gold" data are optimal thermal-state observations for continuum-fitting modeling, in which the disk extends to the innermost-stable circular orbit and is geometrically thin. The black hole spin was unknown for this object before. By utilizing the X-ray continuum fitting method with the relativistic thin disk model \texttt{kerrbb2} and supplying the known dynamical binary system parameters, we find MAXI J1305-704 has a moderate spin ($a_{*}=0.87_{-0.13}^{+0.07}$) at a 68.3\% confidence level. This is the first determination of MAXI J1305-704's spin.
