Breaking the Habit: The Peculiar 2016 Eruption of the Unique Recurrent Nova M31N 2008-12a

0495011 - ASÚ 2019 RIV US eng J - Journal Article
Henze, M. - Darnley, M.J. - Williams, S.C. - Kato, M. - Hachisu, I. - Anupama, G.C. - Arai, A. - Boyd, D. - Burke, D. - Ciardullo, R. - Hornoch, Kamil - Kučáková, Hana … Total 73 authors
Breaking the Habit: The Peculiar 2016 Eruption of the Unique Recurrent Nova M31N 2008-12a.
Astrophysical Journal. Roč. 857, č. 1 (2018), č. článku 68. ISSN 0004-637X. E-ISSN 1538-4357
R&D Projects: GA MŠMT(CZ) LG15010
Institutional support: RVO:67985815
Keywords : galaxies * novae * cataclysmic variables
OECD category: Astronomy (including astrophysics,space science)
Impact factor: 5.580, year: 2018

Here we report (i) the considerable delay in the 2016 eruption date, (ii) the significantly shorter SSS phase, and (iii) the brighter optical peak magnitude (with a hitherto unobserved cusp shape). Early theoretical models suggest that these three different effects can be consistently understood as caused by a lower quiescence mass accretion rate. The corresponding higher ignition mass caused a brighter peak in the free–free emission model. The less massive accretion disk experienced greater disruption, consequently delaying the re-establishment of effective accretion. Without the early refueling, the SSS phase was shortened. Observing the next few eruptions will determine whether the properties of the 2016 outburst make it a genuine outlier in the evolution of M31N 2008-12a.
Permanent Link: http://hdl.handle.net/11104/0288055