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M31N 2008-12a - The Remarkable Recurrent Nova in M31: Panchromatic Observations of the 2015 Eruption

  1. 1.
    0472123 - ASÚ 2017 RIV US eng J - Článek v odborném periodiku
    Darnley, M.J. - Henze, M. - Bode, M.F. - Haciusu, I. - Hernanz, M. - Hornoch, Kamil - Hounsell, R. - Kato, M. - Ness, J.-U. - Osborne, J.P. … celkem 55 autorů
    M31N 2008-12a - The Remarkable Recurrent Nova in M31: Panchromatic Observations of the 2015 Eruption.
    Astrophysical Journal. Roč. 833, č. 2 (2016), 149/1-149/38. ISSN 0004-637X. E-ISSN 1538-4357
    Institucionální podpora: RVO:67985815
    Klíčová slova: individual galaxies * novae cataclysmic variables * individual stars
    Kód oboru RIV: BN - Astronomie a nebeská mechanika, astrofyzika
    Impakt faktor: 5.533, rok: 2016

    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 similar to 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.
    Trvalý link: http://hdl.handle.net/11104/0269470

     
     
Počet záznamů: 1  

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