Long-Term Monitoring of the Black Hole Binary GX 339−4 in the High/Soft State during the 2010 Outburst with MAXI/GSC
Long-Term Monitoring of the Black Hole Binary GX 339−4 in the High/Soft State during the 2010 Outburst with MAXI/GSC
复制标题
DOI：
10.1093/pasj/63.sp3.s803
复制
发表时间：
2011-09
影响因子：
2.3
通讯作者：
M. Shidatsu;Y. Ueda;S. Nakahira;H. Negoro;K. Yamaoka;M. Sugizaki;K. Hiroi;N. Kawai;T. Mihara-T.-Mihar
中科院分区：
文献类型：
--
作者：
M. Shidatsu;Y. Ueda;S. Nakahira;H. Negoro;K. Yamaoka;M. Sugizaki;K. Hiroi;N. Kawai;T. Mihara-T.-Mihar
本文介绍了利用全天空X射线图像监视器（MAXI）/气体狭缝相机（GSC）在2010年爆发期间对银河系候选黑洞GX 339 - 4的高/软状态监测结果。用多色盘（MCD）辐射及其康普顿化分量组成的模型很好地再现了整个8个月期间的所有光谱，康普顿化分量在总通量中的比例<= 25%。尽管通量变化超过3倍，但当倾角i = 46 °，距离d = 8kpc时，最内侧的盘半径为常数，为R_in = 61 +/-2km。该R_in值与天马在高/软状态下的过去测量值一致。假设盘延伸到非旋转黑洞的最内侧稳定圆轨道，我们估计黑洞质量为M = 6.8 +/-0.2 Msun（i = 46 deg，d = 8 kpc），这与朱雀观测到的低/硬态的估计值一致。进一步结合质量函数，得到了在d = 6 - 15 kpc和i <60 deg的允许范围内，质量约束为4.3 Msun <M <13.3 Msun。利用相对论性吸积盘模型对Swift/XRT观测数据进行了讨论，得到了GX 339 - 4黑洞的自旋参数。
We present the results of monitoring the Galactic black hole candidate GX 339-4 with the Monitor of All-sky X-ray Image (MAXI) / Gas Slit Camera (GSC) in the high/soft state during the outburst in 2010. All the spectra throughout the 8-month period are well reproduced with a model consisting of multi-color disk (MCD) emission and its Comptonization component, whose fraction is <= 25% in the total flux. In spite of the flux variability over a factor of 3, the innermost disk radius is constant at R_in = 61 +/- 2 km for the inclination angle of i = 46 deg and the distance of d=8 kpc. This R_in value is consistent with those of the past measurements with Tenma in the high/soft state. Assuming that the disk extends to the innermost stable circular orbit of a non-spinning black hole, we estimate the black hole mass to be M = 6.8 +/- 0.2 M_sun for i = 46 deg and d = 8 kpc, which is consistent with that estimated from the Suzaku observation of the previous low/hard state. Further combined with the mass function, we obtain the mass constraint of 4.3 M_sun < M < 13.3 M_sun for the allowed range of d = 6-15 kpc and i < 60 deg. We also discuss the spin parameter of the black hole in GX 339-4 by applying relativistic accretion disk models to the Swift/XRT data.