arXivDaily arXiv每日学术速递 周一至周五更新
北美退伍军人节(Veterans Day),12 日无更新
arXiv 0910.4607astro-ph.HEastro-ph.SR
收藏

经典新星的X射线观测。理论意义

X-ray observations of classical novae. Theoretical implications

M. Hernanz, G. Sala

摘要:

对爆发和爆发后的经典新星的X射线探测提供了关于爆炸机制的独特和关键的信息。软X射线揭示了热的白矮星光球,只要氢(H)核燃烧仍然存在,膨胀的外壳足够透明,而硬X射线则提供了关于再生的激变变星中的喷出物和/或吸积流的信息。超软X射线发射阶段的持续时间与经典新星的关闭有关,即,在白矮星核心上的氢燃烧。本文综述了X射线观测结果,特别强调了对爆发后稳定氢燃烧持续时间的影响及其理论解释。经常性新星(包括“标准”对象和最近发现的)的特殊情况下,还审查了短复发周期的理论可行性,以及关于Ia型超新星的情况下的影响。

英文摘要:

Detection of X-rays from classical novae, both in outburst and post-outburst, provides unique and crucial information about the explosion mechanism. Soft X-rays reveal the hot white dwarf photosphere, whenever hydrogen (H) nuclear burning is still on and expanding envelope is transparent enough, whereas harder X-rays give information about the ejecta and/or the accretion flow in the reborn cataclysmic variable. The duration of the supersoft X-ray emission phase is related to the turn-off of the classical nova, i.e., of the H-burning on top of the white dwarf core. A review of X-ray observations is presented, with a special emphasis on the implications for the duration of post-outburst steady H-burning and its theoretical explanation. The particular case of recurrent novae (both the "standard" objects and the recently discovered ones) is also reviewed, in terms of theoretical feasibility of short recurrence periods, as well as regarding implications for scenarios of type Ia supernovae.

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。

↑