SIMBAD references

2014A&A...563A...2H - Astronomy and Astrophysics, volume 563A, 2-2 (2014/3-1)

X-ray monitoring of classical novae in the central region of M 31 III. Autumn and winter 2009/10, 2010/11, and 2011/12.


Abstract (from CDS):

Classical novae (CNe) represent the major class of supersoft X-ray sources (SSSs) in the central region of our neighbouring galaxy M 31. We performed a dedicated monitoring of the M 31central region, which aimed to detect SSS counterparts of CNe, with XMM-Newton and Chandra between Nov. and Mar. of the years 2009/10, 2010/11, and 2011/12. We systematically searched our data for X-ray counterparts of CNe and determined their X-ray light curves and also their spectral properties in the case of XMM-Newton data. Additionally, we determined luminosity upper limits for all previously known X-ray emitting novae, which are not detected anymore, and for all CNe in our field of view with recent optical outbursts. In total, we detected 24 novae in X-rays. Seven of these sources were known from previous observations, including the M 31nova with the longest SSS phase, M31N 1996-08b, which was found to fade below our X-ray detection limit 13.8yr after outburst. Of the new discoveries, several novae exhibit significant variability in their short-term X-ray light curves with one object showing a suspected period of about 1.3h. We studied the SSS state of the most recent outburst of a recurrent nova, which had previously shown the shortest time ever observed between two outbursts (∼5yr). The total number of M 31novae with X-ray counterpart was increased to 79, and we subjected this extended catalogue to detailed statistical studies. Four previously indicated correlations between optical and X-ray parameters could be confirmed and improved. Furthermore, we found indications that the multi-dimensional parameter space of nova properties might be dominated by a single physical parameter, and we provide interpretations and suggest implications. We studied various outliers from the established correlations and discuss evidence of a different X-ray behaviour of novae in the M 31bulge and disk. Exploration of the multi-wavelength parameter space of optical and X-ray measurements is shown to be a powerful tool for examining properties of extragalactic nova populations. While there are hints that the different stellar populations of M 31 (bulge vs. disk) produce dissimilar nova outbursts, there is also growing evidence that the overall behaviour of an average nova might be understood in surprisingly simple terms.

Abstract Copyright:

Journal keyword(s): galaxies: individual: M 31 - novae, cataclysmic variables - X-rays: binaries

VizieR on-line data: <Available at CDS (J/A+A/563/A2): table1.dat table2.dat table3.dat table4.dat table5.dat table6.dat table7.dat table8.dat table9.dat refs.dat>

Simbad objects: 131

goto Full paper

goto View the references in ADS

To bookmark this query, right click on this link: simbad:2014A&A...563A...2H and select 'bookmark this link' or equivalent in the popup menu


© Université de Strasbourg/CNRS

    • Contact