Supersoft X-rays reveal a classical nova in the M 31 globular cluster Bol 126

0399705 - ASÚ 2014 RIV FR eng J - Journal Article
Henze, M. - Pietsch, W. - Haberl, F. - Della Valle, M. - Riffeser, A. - Salla, G. - Hatzidimitriou, D. - Hofmann, F. - Hartmann, D.H. - Koppenhoefer, J. - Seitz, S. - Williams, G. - Hornoch, Kamil - Itagaki, K. - Kabashima, F. - Nishiyama, K. - Xing, G. - Lee, C.H. - Magnier, E. - Chambers, K.
Supersoft X-rays reveal a classical nova in the M 31 globular cluster Bol 126.
Astronomy & Astrophysics. Roč. 549, January (2013), A120/1-A120/15. ISSN 0004-6361. E-ISSN 1432-0746
Institutional support: RVO:67985815
Keywords : galaxies individual M 31 * novae * cataclysmic variables
Subject RIV: BN - Astronomy, Celestial Mechanics, Astrophysics
Impact factor: 4.479, year: 2013

To study the SSS state of CNe we carried out a high-cadence X-ray monitoring of the M 31 central area with XMM-Newton and Chandra. This project is supplemented by regular optical monitoring programmes at various observatories. Our observations reveal that the X-ray source in Bol 126 is the third SSS in an M 31 GC and can be confirmed as the second CN in the M 31 GC system. This nova is named M31N 2010-10f. Its properties in the X-ray (high black-body temperature, short SSS phase) and optical (relatively high maximum magnitude, fast decline) regimes agree with a massive white dwarf (M-WD greater than or similar to 1.3 M-circle dot) in the binary system. Incorporating the data on previously found (suspected) novae in M 31 GCs we used our high-cadence X-ray monitoring observations to estimate a tentative nova rate in the M 31 GC system of 0.05 yr(-1) GC(-1). An optical estimate, based on the recent 10.5-year WeCAPP survey, gives a lower nova rate, which is compatible with the X-ray rate on the 95% confidence level.
Permanent Link: http://hdl.handle.net/11104/0226946