Drastic Spectroscopic Variability of the Be/X-Ray Binary Ariel 0535+262/V725 Tau during and after the 2009 Giant Outburst
Drastic Spectroscopic Variability of the Be/X-Ray Binary Ariel 0535+262/V725 Tau during and after the 2009 Giant Outburst
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DOI：
10.1093/pasj/63.4.l25
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发表时间：
2011-05
影响因子：
2.3
通讯作者：
Y. Moritani;D. Nogami;A. Okazaki;A. Imada;E. Kambe;S. Honda;O. Hashimoto;K. Ichikawa
中科院分区：
文献类型：
--
作者：
Y. Moritani;D. Nogami;A. Okazaki;A. Imada;E. Kambe;S. Honda;O. Hashimoto;K. Ichikawa
报道了Be/X射线双星A 0535+262/V725 Tau在2009年11月/12月的一次大爆发期间及之后的高色散光谱观测结果，观测到的发射线轮廓反映了Be星星（Be盘）的几何薄拱星包层结构，显示出剧烈的变化，并表明存在翘曲分量。在经过近星点后看到的增强的蓝肩意味着从Be盘的致密部分到中子星星的气体流。
We report on high-dispersion optical spectroscopic observations of the Be/X-ray binary A 0535+262/V725 Tau during a giant outburst in 2009 November/December, and after it. The observed emission line profiles, reflecting the structure of the geometrically thin circumstellar envelope of the Be star (Be disk), show drastic variabilities, and indicate the existence of a warped component. The enhanced blue shoulder seen after periastron passage implies a gas stream from a dense part of the Be disk to the neutron star.