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arXiv 2009.12993astro-ph.SRastro-ph.HE
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BC Cassiopeiae:首次发现喷发后新星中的IW和型现象

BC Cassiopeiae: First Detection of IW And-Type Phenomenon Among Post-Eruption Novae

Taichi Kato, Naoto Kojiguchi

摘要:

IW型矮新星是近年来发现的一类激变变星,其特征是从一个类似静止的阶段开始一系列的增亮,并伴随着阻尼振荡和深凹。我们发现,1929年爆发的所谓的经典新星BC Cas在2018年经历了IW和型矮新星的状态,爆发后89年。这一发现表明,新星爆发后的高质量转移率与IW和型现象。由新星的衰变率推断出的白矮星质量远高于激变变星中白矮星的平均质量,大质量的白矮星可能是IW And-type现象出现的原因。

英文摘要:

IW And-type dwarf novae are recently recognized group of cataclysmic variables which are characterized by a sequence of brightening from a standstill-like phase with damping oscillations often followed by a deep dip. We found that the supposed classical nova BC Cas which erupted in 1929 experienced a state of an IW And-type dwarf nova in 2018, 89 yr after the eruption. This finding suggests that high mass-transfer rate following the nova eruption is associated with the IW And-type phenomenon. The mass of the white dwarf inferred from the decline rate of the nova is considerably higher than the average mass of the white dwarfs in cataclysmic variables and the massive white dwarfs may be responsible for the manifestation of the IW And-type phenomenon.

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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