Erratum: ASCA Observations of the Central Regions of M 31
Erratum: ASCA Observations of the Central Regions of M 31
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勘误表：ASCA 对 M 31 中部区域的观测
DOI：
10.1093/pasj/53.5.875
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发表时间：
2001
影响因子：
2.3
通讯作者：
K. Makishima
中科院分区：
文献类型：
--
作者：
H. Takahashi;Y. Okada;M. Kokubun;K. Makishima
利用ASCA对M31中心区域的空间积分x射线光谱进行了研究。数据在三个不同的圆形区域中积累，半径分别为3‘,6’和12'，都以核为中心。三个区域的光谱比较相似。在1.5 keV以上的能量范围内，光谱是由盘状黑体成分和黑体成分的组合再现的，这意味着发射主要来自低质量x射线双星的组合。在低于1.5 keV的能量中，光谱包含两个额外的较软的成分，用温度为~ 0.9 keV和~ 0.3 keV的薄热等离子体发射模型表示。在中央12' （2.4 kpc）区域和0.5-10 keV波段，二元组分的光度为2.6 × 10^{38} erg/s，而两个较软的组分的光度均为~ 2 × 10^{38} erg/s。这些结果与其他任务的结果进行了比较，特别是钱德拉和xmm -牛顿。讨论了除二元谱外两种较软谱的性质。
Using ASCA, spatially integrated X-ray spectra of the central regions of M31 were studied. Data were accumulated over three different circular regions, with the radii of 3', 6' and 12', all centered on the nucleus. The spectra are relatively similar among the three regions. In the energy range above 1.5 keV, the spectra are reproduced by a combination of a disk black-body component and a black-body component, implying that the emission mainly comes from an assembly of low-mass X-ray binaries. In energies below 1.5 keV, the spectra involves two additional softer components, expressed with thin-thermal plasma emission models of temperatures ~ 0.9 keV and ~ 0.3 keV. Over the central 12' (2.4 kpc) region and in the 0.5-10 keV energy band, the binary component has a luminosity of 2.6 x 10^{39} erg/s, while the two softer components both exhibit luminosities of ~ 2 x 10^{38} erg/s. These results are compared with those from other missions, including Chandra and XMM-Newton in particular. Discussion is made on the nature of the two softer spectral components besides the binary one.