| Type |
Journal Article |
| Names |
M. Henze, W. Pietsch, F. Haberl, G. Sala, M. Hernanz, D. Hatzidimitriou, A. Rau, D. H. Hartmann, J. Greiner, M. Orio, H. Stiele, M. J. Freyberg |
| Publication |
Astronomische Nachrichten |
| Volume |
331 |
| Issue |
2 |
| Pages |
193 |
| Date |
2010 |
| URL |
http://adsabs.harvard.edu/abs/2010AN....331..193H |
| Library Catalog |
NASA ADS |
| Abstract |
Classical novae (CNe) have recently been reported to represent the
major class of supersoft X-ray sources (SSSs) in the central area of our
neighbouring galaxy M 31. This paper presents a review of results from
recent X-ray observations of M 31 with XMM-Newton and Chandra. We
carried out a dedicated optical and X-ray monitoring program of CNe and
SSSs in the central area of M 31. We discovered the first SSSs in M 31
globular clusters (GCs) and their connection to the very first
discovered CN in a M 31 GC. This result may have an impact on the CN
rate in GCs. Furthermore, in our optical and X-ray monitoring data we
discovered the CN M31N 2007-11a, which shows a very short SSS phase of
29-52 days. Short SSS states (durations ≤ 100 days) of CNe indicate
massive white dwarfs (WDs) that are candidate progenitors of supernovae
type Ia. In the case of M31N 2007-11a, the optical and X-ray light
curves suggest a binary containing a WD with M_WD > 1.0
M\sun. Finally, we present the discovery of the SSS
counterpart of the CN M31N 2006-04a k. The X-ray light curve of M31N
2006-04a shows short-time variability, which might indicate an orbital
period of about 2 hours.
Partly based on observations with \xmmk, an ESA Science Mission with
instruments and contributions directly funded by ESA Member States and
NASA. |
| Tags |
Cataclysmic Variables, M31N 2006-04a k), M31N 2007-11a, NOVAE, X-Rays: Binaries, galaxies: individual: (M 31), stars: individual: (M31N 2007-06b k |