M31N 2008-12a - the remarkable recurrent nova in M31: Pan-chromatic observations of the 2015 eruption

Darnley, M.J.; Henze, M.; Bode, M.F.; Hachisu, I.; Hernanz, M.; Hornoch, K.; Ness, J.; Osborne, J.P.; Rodriguez-Gil, P.; Shafter, A.W.; Shara, M.M.; Steele, I.A.; Williams, S.C.; Arai, A.; Barsukova, E.A.; Fabrika, S.; Goranskij, V.P.; et al.

Авторы: Darnley M.J., Henze M., Bode M.F., Hachisu I., Hernanz M., Hornoch K., Ness J., Osborne J.P., Rodriguez-Gil P., Shafter A.W., Shara M.M., Steele I.A., Williams S.C., Arai A., Barsukova E.A., Fabrika S., Goranskij V.P., et al.
Журнал: Astrophysical Journal
Том: 833
Номер: 2 (149)
Год издания: 2016
Издательство: University of Chicago Press
Местоположение издательства: United States
Первая страница: 1
Последняя страница: 45
DOI: 10.3847/1538-4357/833/2/149
Аннотация: The Andromeda Galaxy recurrent nova M31N 2008-12a had been observed in eruption 10 times, including yearly eruptions from 2008 to 2014. With a measured recurrence period of P(rec)=351+/-13 days (we believe the true value to be half of this) and a white dwarf very close to the Chandrasekhar limit, M31N 2008-12a has become the leading pre-explosion supernova type Ia progenitor candidate. Following multi-wavelength follow-up observations of the 2013 and 2014 eruptions, we initiated a campaign to ensure early detection of the predicted 2015 eruption, which triggered ambitious ground- and space-based follow-up programs. In this paper we present the 2015 detection, visible to near-infrared photometry and visible spectroscopy, and ultraviolet and X-ray observations from the Swift observatory. The LCOGT 2 m (Hawaii) discovered the 2015 eruption, estimated to have commenced at August 28.28+/-0.12 UT. The 2013–2015 eruptions are remarkably similar at all wavelengths. New early spectroscopic observations reveal short-lived emission from material with velocities ~13,000 km s−1, possibly collimated outflows. Photometric and spectroscopic observations of the eruption provide strong evidence supporting a red giant donor. An apparently stochastic variability during the early supersoft X-ray phase was comparable in amplitude and duration to past eruptions, but the 2013 and 2015 eruptions show evidence of a brief flux dip during this phase. The multi-eruption Swift/XRT spectra show tentative evidence of high-ionization emission lines above a high-temperature continuum. Following Henze et al. (2015a), the updated recurrence period based on all known eruptions is P(rec)=174+/-10 days, and we expect the next eruption of M31N 2008-12a to occur around 2016 mid-September.
Добавил в систему: Горанский Виталий Петрович

	ИСТИНА	Войти в систему Регистрация
	Интеллектуальная Система Тематического Исследования НАукометрических данных
	Главная Поиск Статистика О проекте Помощь

ИСТИНА

Интеллектуальная Система Тематического Исследования НАукометрических данных

M31N 2008-12a - the remarkable recurrent nova in M31: Pan-chromatic observations of the 2015 eruptionстатья

Прикрепленные файлы