تقرير
X-Ray Flashes in Recurrent Novae: M31N 2008-12a and the Implications of the Swift Non-detection
| العنوان: | X-Ray Flashes in Recurrent Novae: M31N 2008-12a and the Implications of the Swift Non-detection |
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| المؤلفون: | Kato, Mariko, Saio, Hideyuki, Henze, Martin, Ness, Jan-Uwe, Osborne, Julian P., Page, Kim L., Darnley, Matthew J., Bode, Michael F., Shafter, Allen W., Hernanz, Margarita, Gehrels, Neil, Kennea, Jamie, Hachisu, Izumi |
| سنة النشر: | 2016 |
| المجموعة: | Astrophysics |
| مصطلحات موضوعية: | Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Solar and Stellar Astrophysics |
| الوصف: | Models of nova outbursts suggest that an X-ray flash should occur just after hydrogen ignition. However, this X-ray flash has never been observationally confirmed. We present four theoretical light curves of the X-ray flash for two very massive white dwarfs (WDs) of 1.380 and 1.385 M_sun and for two recurrence periods of 0.5 and 1 years. The duration of the X-ray flash is shorter for a more massive WD and for a longer recurrence period. The shortest duration of 14 hours (0.6 days) among the four cases is obtained for the 1.385 M_sun WD with one year recurrence period. In general, a nova explosion is relatively weak for a very short recurrence period, which results in a rather slow evolution toward the optical peak. This slow timescale and the predictability of very short recurrence period novae give us a chance to observe X-ray flashes of recurrent novae. In this context, we report the first attempt, using the Swift observatory, to detect an X-ray flash of the recurrent nova M31N 2008-12a (0.5 or 1 year recurrence period), which resulted in the non-detection of X-ray emission during the period of 8 days before the optical detection. We discuss the impact of these observations on nova outburst theory. The X-ray flash is one of the last frontiers of nova studies and its detection is essentially important to understand the pre-optical-maximum phase. We encourage further observations. Comment: 12 pages, including 9 figures and 3 tables. To appear in the Astrophysical Journal |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.3847/0004-637X/830/1/40 |
| URL الوصول: | http://arxiv.org/abs/1607.07985 |
| رقم الأكسشن: | edsarx.1607.07985 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.3847/0004-637X/830/1/40 |
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