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X-ray monitoring of Classical Novae in the central region of M 31

Citation:

Henze M, Pietsch W, Haberl F, Hernanz M, Sala G, Hatzidimitriou D, Della Valle M, Rau A, Hartmann DH, Burwitz V, et al. X-ray monitoring of Classical Novae in the central region of M 31. [Internet]. 2012;83:798.

Abstract:

We review recent results of the first dedicated monitoring programme for supersoft X-ray source (SSS) states of classical novae (CNe) in the central region of the Andromeda galaxy ({M 31}), performed in high-cadence campaigns with {XMM-Newton } and Chandra. After the first three years we had detected 21 novae in X-rays (17 new), thereby discovering peculiar objects and increasing the number of known {M 31} novae with SSS state to 60. This is the largest sample known in any galaxy and we used it to carry out the first statistical analysis of novae in X-rays. We found several correlations between optical and SSS parameters, and carried out a simulation on the completeness of our monitoring as well as the first nova population study in X-rays. This shows that X-ray surveys of CNe populations are a powerful tool to address the open questions connected to these objects.

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