On the contribution of point sources to the Galactic ridge X-ray emission
On the contribution of point sources to the Galactic ridge X-ray emission
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点源对银脊X射线发射的贡献
DOI：
10.1051/0004-6361:20077347
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发表时间：
2007
影响因子：
6.5
通讯作者：
Russia
中科院分区：
文献类型：
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作者：
M.Revnivtsev;S. ;Garching;Germany;;Moscow;Russia
我们分析了以L=28.55°，b=-0.03°为中心的银河系平面区的深Chandra观测，目的是得到该地区弱点源对银河脊X射线发射贡献的最佳约束条件。我们证明，绝大多数探测到的源来自银河系，很可能是激变变星和日冕活动恒星。我们利用被探测源的数流函数将银河系X射线源的光度函数限制在10 30-10 32 S-1 范围内，并与太阳附近源的光度函数进行了比较，得到了很好的一致性。在当前灵敏度水平下，能量为1-7keV的总通量分解为点源的比例为0~25%。除去河外源的预期贡献，约19%的GRXE来自星际吸收校正通量大于1.2美元/倍的星际吸收校正通量在1-7 keV的 S-1 cm-2 。
We analyzed deep Chandra observations of the Galactic plane region centered at l = 28.55°, b = -0.03° with the aim to obtain the best possible constraints on the contribution of weak point sources to the Galactic ridge X-ray emission (GRXE) in this region. We demonstrate that the vast majority of the detected sources are Galactic in origin and are probably cataclysmic variables and coronally active stars. We use the number-flux function of detected sources to constrain the luminosity function of Galactic X-ray sources in the range 10 30 -10 32 erg s -1 and find good agreement with the luminosity function of sources in the Solar vicinity. The fraction of the total flux at energies 1-7 keV resolved into point sources at the current sensitivity level is ~25%. Excluding the expected contribution of extragalactic sources, ~19% of the GRXE is due to point Galactic sources with interstellar absorption corrected fluxes higher than 1.2 $\times$ 10 -15 erg s -1 cm -2 in the energy band 1-7 keV.
钱德拉对典型银河平面区域的深度观测和近红外识别
DOI：
--
发表时间：
2005
期刊：
Astrophysical Journal 635
影响因子：
--
作者：
Ebisawa;K.;Bamba;A.et al.
通讯作者：
A.et al.