The Early X-Ray Emission from V382 Velorum (Nova Velorum 1999): An Internal Shock Model
The Early X-Ray Emission from V382 Velorum (Nova Velorum 1999): An Internal Shock Model
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V382 Velorum (Nova Velorum 1999) 的早期 X 射线发射：内部冲击模型
DOI：
10.1086/320220
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发表时间：
2001
期刊：
影响因子：
--
通讯作者：
M. Ishida
中科院分区：
文献类型：
--
作者：
K. Mukai;M. Ishida
我们展示了经典新星 V382 Velorum 早期 X 射线发射的 ASCA 和 RXTE 观测结果。其ASCA光谱较硬（kT ~ 10 keV），具有强（1023 cm-2）本征吸收。在随后的 RXTE 数据中，由于温度下降和色谱柱减少，光谱变得更柔和。我们认为，这将 X 射线发射置于 1999 年 V382 Vel 产生的最外层喷射物的内部，因此它一定是新星喷射物内部冲击的结果。 Fe Kα 线的弱点可能表明发射 X 射线的等离子体不处于电离平衡。
We present the results of ASCA and RXTE observations of the early X-ray emission from the classical nova V382 Velorum. Its ASCA spectrum was hard (kT ~ 10 keV) with strong (1023 cm-2) intrinsic absorption. In the subsequent RXTE data, the spectra became softer, because of both a declining temperature and a diminishing column. We argue that this places the X-ray emission interior to the outermost ejecta produced by V382 Vel in 1999, and therefore it must have been the result of a shock internal to the nova ejecta. The weakness of the Fe Kα lines probably indicates that the X-ray-emitting plasmas are not in ionization equilibrium.