Resolving short supersoft source states of optical novae in the core of M31

Details Resolving short supersoft source states of optical novae in the core of M31 Resolving short supersoft source states of optical novae in the core of M31

Oct 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009xmm..prop...18p&link_type=abstract

XMM-Newton Proposal ID #06505601

Physics

White Dwarf Binaries, Neutron Star Binaries, Cataclysmic Variables, Ulxs, Black Holes, M31

Scientific paper

We propose to continue the monitoring of the M31 core with 5x23ks XMM EPIC and 5x20ks Chandra HRC-I observations equally distributed from Nov 2010 to mid Feb 2011 to determine additional light curves for short supersoft source (SSS) states of optical novae. SSS states with <100 d duration indicate accreting massive white dwarfs (WDs). They are proposed as SN Ia progenitors and deter- mining their frequency is very important. We will correlate detected sources with novae from optical monitoring. With a nova rate in the field of ~38/yr and SSS states lasting from weeks to years we will follow light curves of many novae. Durations of the SSS state will allow us to constrain envelop and WD masses. We will also monitor time variability of ~200 M31 X-ray sources (XRBs)

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