...
  • 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 >XMM-Newton and Suzaku spectroscopic studies of unidentified X-ray sources towards the Galactic bulge: 1RXS J180556.1-343818 and 1RXS J173905.2-392615
【24h】

XMM-Newton and Suzaku spectroscopic studies of unidentified X-ray sources towards the Galactic bulge: 1RXS J180556.1-343818 and 1RXS J173905.2-392615

机译：XMM-Newton 和 Suzaku 对银河系隆起的不明 X 射线源的光谱研究：1RXS J180556.1-343818 和 1RXS J173905.2-392615

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

With XMM-Newton and Suzaku observations, for the first time, we acquired broad-band spectra of two unidentified X-ray sources towards the Galactic bulge: 1RXS J180556.1-343818 and 1RXS J173905.2-392615. The 1RXS J180556.1-343818 spectrum in the 0.3-7 keV band was explained by X-ray emission that originated from an optically-thin thermal plasma with temperatures of 0.5 and 1.8 keV. The estimated absorption column density of N-H similar to 4 x 10(20) cm(-2) was significantly smaller than the Galactic HI column density towards the source. A candidate for its optical counterpart, HD321269, was found within 4 ''. In terms of the X-ray properties and the positional coincidence, it is quite conceivable that 1RXS J180556.1-343818 is an active G giant. We also found a dim X-ray source that was positionally consistent with 1RXS J173905.2-392615. Assuming that the X-ray spectrum can be reproduced with an absorbed, optically-thin thermal plasma model with kT = 1.6 keV, the X-ray flux in the 0.5-8 keV band was 8.7 x 10(-14) erg s(-1) cm(-2), fainter by a factor of similar to 7 than that of 1RXSJ173905.2-392615 during the ROSAT observation. The follow-up observations we conducted revealed that these two sources would belong to the Galactic disk, rather than the Galactic bulge.
机译：通过XMM-Newton和Suzaku的观测，我们首次获得了两个朝向银河系凸起的未知X射线源的宽带光谱：1RXS J180556.1-343818和1RXS J173905.2-392615。0.3-7 keV波段的1RXS J180556.1-343818光谱是由温度为0.5和1.8 keV的光学薄热等离子体产生的X射线发射来解释的。估计的N-H吸收柱密度类似于4 x 10（20）cm（-2），明显小于银河HI柱密度。它的光学对应物 HD321269 的候选者在 4 '' 内被发现。就X射线特性和位置重合而言，可以想象1RXS J180556.1-343818是一颗活跃的G巨星。我们还发现了一个昏暗的X射线源，其位置与1RXS J173905.2-392615一致。假设X射线光谱可以用kT = 1.6 keV的吸收、光学薄的热等离子体模型再现，则在0.5-8 keV波段的X射线通量为8.7 x 10（-14） erg s（-1） cm（-2），比ROSAT观测期间1RXSJ173905.2-392615的X射线通量暗7倍。我们进行的后续观测表明，这两个来源将属于银河系盘，而不是银河系隆起。

著录项

相似文献

  • 外文文献
  • 中文文献
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