2014A&A...563L...9D


C.D.S. - SIMBAD4 rel 1.7 - 2021.03.02CET06:41:34

2014A&A...563L...9D - Astronomy and Astrophysics, volume 563, L9-9 (2014/3-1)

A remarkable recurrent nova in M 31: The optical observations.

DARNLEY M.J., WILLIAMS S.C., BODE M.F., HENZE M., NESS J.-U., SHAFTER A.W., HORNOCH K. and VOTRUBA V.

Abstract (from CDS):

In late Nov. 2013 the fifth eruption in five years of the M31 recurrent nova M31N 2008-12a was announced. In this Letter we address the optical lightcurve and progenitor system of M31N 2008-12a. Optical imaging data of the 2013 eruption from the Liverpool Telescope, La Palma; Danish 1.54m Telescope, La Silla; and archival Hubble Space Telescope near-IR, optical, and near-UV data are astrometrically and photometrically analysed. Photometry of the 2013 eruption, combined with three previous eruptions, enabled construction of a template lightcurve of a very fast nova (t2(V)≃4-days). The archival data allowed recovery of the progenitor system in optical and near-UV data, indicating a red-giant secondary with bright accretion disk, or alternatively a system with a sub-giant secondary but dominated by a disk. The eruptions of M31N 2008-12a, and a number of historic X-ray detections, indicate a unique system with a recurrence timescale of ∼1yr. This implies the presence of a very high-mass white dwarf and a high accretion rate. The recovered progenitor system is consistent with such an elevated rate of accretion. We encourage additional observations, especially towards the end of 2014.

Abstract Copyright:

Journal keyword(s): galaxies: individual: M31 - novae, cataclysmic variables - stars: individual: M31N 2008-12a

Simbad objects: 5

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Number of rows : 5

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 M 31 G 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 11207 1
2 RX J0045.4+4154 No* 00 45 28.80 +41 54 10.1           ~ 151 1
3 V* T CrB Sy* 15 59 30.1619486506 +25 55 12.607985109   11.516 10.247 9.70   M3IIIe_sh 660 0
4 NOVA Sco 1863 No* 16 22 30.7782086963 -17 52 43.162570042   8.80 8.70     F8+K2 475 0
5 V* RS Oph No* 17 50 13.1592776879 -06 42 28.481553668   12.29 4.30     OB+M2ep 939 0

    Equat.    Gal    SGal    Ecl

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2021.03.02-06:41:34

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