M31N 2017-01e: Discovery of a Previous Eruption in this Enigmatic Recurrent Nova

0582670 - ASÚ 2024 RIV US eng J - Článek v odborném periodiku
Shafter, A.W. - Taguchi, K. - Zhao, J. - Hornoch, Kamil
M31N 2017-01e: Discovery of a Previous Eruption in this Enigmatic Recurrent Nova.
Research Notes of the AAS. Roč. 6, č. 11 (2022), č. článku 241. E-ISSN 2515-5172
Institucionální podpora: RVO:67985815
Klíčová slova: cataclysmic variable stars * novae * recurrent novae
Obor OECD: Astronomy (including astrophysics,space science)
Způsob publikování: Open access

We report the discovery of a previously unknown eruption of the recurrent nova M31N 2017-01e that took place on 2012 January 11. The earlier eruption was detected by Pan-STARRS and occurred 1847 days (5.06 yr) prior to the eruption on 2017 January 31 (M31N 2017-01e). The nova has now been seen to have had a total of four recorded eruptions (M31N 2012-01c, 2017-01e, 2019-09d, and 2022-03d) with a mean time between outbursts of just 929.5 ± 6.8 days (2.545 ± 0.019 yr), the second shortest recurrence time known for any nova. We also show that there is a blue variable source (V = 20.56 ± 0.17, B - V ≃ 0.045), apparently coincident with the position of the nova, that exhibits a 14.3 days periodicity. Possible models of the system are proposed, but none are entirely satisfactory.
Trvalý link: https://hdl.handle.net/11104/0350748