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arXiv 2104.14720astro-ph.SR
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V386 Serpentis在2019年矮新星爆发后的加热和脉动

The Heating and Pulsations of V386 Serpentis after its 2019 Dwarf Nova Outburst

Paula Szkody, Patrick Godon, Boris T. Gaensicke, Stella Kafka, Odette F. T. Castillo, Keaton J. Bell, P. B. Cho, Edward M. Sion, Praphull Kumar, Dean M. Townsle… 展开作者

Paula Szkody, Patrick Godon, Boris T. Gaensicke, Stella Kafka, Odette F. T. Castillo, Keaton J. Bell, P. B. Cho, Edward M. Sion, Praphull Kumar, Dean M. Townsley, Zach Vanderbosch, Karen I. Winget, Claire J. Olde Loohuis

摘要:

以下的脉动光谱的白矮星通过加热和冷却参与矮新星爆发周期提供了一个独特的看法,对流驱动的变化发生在几个月的时间尺度与千年的非吸积白矮星。2019年1月,矮新星V386 Ser(少数包含吸积、脉动白矮星的矮新星之一)经历了一次大幅度的爆发。哈勃太空望远镜的紫外光谱是在爆发后7个月和13个月获得的,在此期间,地面光学测光和高速测光分别在爆发后5.5个月和17个月获得。由此产生的光谱和脉动分析显示,在两次紫外观测之间,白矮星从21,020 K冷却到18,750 K(重力对数(g)= 8.1),同时在爆发后比静止时短得多的时间内,在紫外和光学上都存在明显的强烈脉动。脉动周期在爆发后的一年中持续延长,与脉动理论一致。然而,它仍然有待观察,如果行为在较长的时间过去的爆发将模仿不寻常的非单调冷却和长时间在类似的系统GW Lib明显。

英文摘要:

Following the pulsation spectrum of a white dwarf through the heating and cooling involved in a dwarf nova outburst cycle provides a unique view of the changes to convective driving that take place on timescales of months versus millenia for non-accreting white dwarfs. In 2019 January the dwarf nova V386 Ser (one of a small number containing an accreting, pulsating white dwarf), underwent a large amplitude outburst. Hubble Space Telescope ultraviolet spectra were obtained 7 and 13 months after outburst along with optical ground-based photometry during this interval and high-speed photometry at 5.5 and 17 months after outburst. The resulting spectral and pulsational analysis shows a cooling of the white dwarf from 21,020 K to 18,750 K (with a gravity log(g) = 8.1) between the two UV observations, along with the presence of strong pulsations evident in both UV and optical at a much shorter period after outburst than at quiescence. The pulsation periods consistently lengthened during the year following outburst, in agreement with pulsation theory. However, it remains to be seen if the behavior at longer times past outburst will mimic the unusual non-monotonic cooling and long periods evident in the similar system GW Lib.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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