...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>PASJ: Publications of the Astronomical Society of Japan >X-ray and near-infrared observations of GX 339-4 in the low/hard state with Suzaku and IRSF
【24h】

X-ray and near-infrared observations of GX 339-4 in the low/hard state with Suzaku and IRSF

机译：朱雀和IRSF在低/硬状态下对GX 339-4的X射线和近红外观察

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

X-ray and near-infrared (J -H-K _s) observations of the galactic black-hole binary GX 339-4 in the low/hard state were performed with Suzaku and IRSF in 2009 March. The spectrum in the 0.5-300 keV band is dominated by thermal Comptonization of multicolor disk photons, with a small contribution from a direct disk component, indicating that the inner disk is almost fully covered by hot corona with an electron temperature of ?175 keV. The Comptonizing corona has at least two optical depths, τ ? 1, 0.4. Analysis of the iron-K line profile yields an inner-disk radius of (13.3 _(-6.0)~(+6.4))R _g (R _g represents the gravitational radius GM=c ~2), with the best-fit inclination angle of ?50°. This radius is consistent with that estimated from the continuum fit by assuming the conservation of photon numbers in Comptonization. Our results suggest that the standard disk of GX 339-4 is likely truncated before reaching the innermost stable circular orbit (for a non-rotating black hole) in the low/hard states at ～1% of the Eddington luminosity. The one-day averaged near-infrared light curves are found to be correlated with hard X-ray flux with F _(Ks) ∝ F _X~(0.45). The flatter near-infrared νFν spectrum than the radio one suggests that the optically thin synchrotron radiation from the compact jets dominates the near-infrared flux. Based on a simple analysis, we estimate the magnetic field and size of the jet base to be 5 × 10 ~4G and 6 × 10 ~8 cm, respectively. The synchrotron self Compton component is estimated to be approximately 0.4% of the total X-ray flux.
机译：Suzaku和IRSF于2009年3月对银河黑洞双星GX 339-4的低/硬状态进行了X射线和近红外（J -H-K s）观测。 0.5-300 keV波段的光谱由多色盘光子的热康顿化控制，直接盘成分的贡献很小，表明内盘几乎被电子温度为175 keV的热电晕完全覆盖。质子化电晕具有至少两个光学深度τ？ 1，0.4。对铁-K线轮廓进行分析得出的内盘半径为（13.3 _（-6.0）〜（+6.4））R _g（R _g表示重力半径GM = c〜2），并且具有最佳拟合的倾斜角度为50°。该半径与通过假设康普顿化中的光子数守恒而从连续拟合估计的半径一致。我们的结果表明，GX 339-4的标准圆盘可能在低/硬状态下以约1％的爱丁顿光度到达最里面的稳定圆形轨道（对于非旋转黑洞）之前被截断。发现一日平均近红外光曲线与F_（Ks）∝F_X〜（0.45）的硬X射线通量相关。比收音机更平坦的近红外νFν光谱表明，来自紧凑型喷头的光学薄同步加速器辐射主导着近红外通量。在简单分析的基础上，我们估计喷流基座的磁场和大小分别为5×10〜4G和6×10〜8 cm。估计同步加速器自身的康普顿分量约为X射线总通量的0.4％。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号