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X-ray monitoring of classical novae in the central region of M 31: I. June 2006–March 2007

Henze, M. and Pietsch, W. and Haberl, F. and Hernanz, M. and Sala, G. and Della Valle, M. and Hatzidimitriou, D. and Rau, A. and Hartmann, D. H. and Greiner, J. and Burwitz, V. and Fliri, J. (2010) X-ray monitoring of classical novae in the central region of M 31: I. June 2006–March 2007. Astronomy and Astrophysics, 523 . Art. No. A89. ISSN 0004-6361. https://resolver.caltech.edu/CaltechAUTHORS:20110118-132618486

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Abstract

Context. Classical novae (CNe) have recently been reported to represent the major class of supersoft X-ray sources (SSSs) in the central region of our neighbour galaxy M 31. Aims. We carried out a dedicated monitoring of the M 31 central region with XMM-Newton and Chandra in order to find SSS counterparts of CNe, determine the duration of their SSS phase and derive physical outburst parameters. Methods. We systematically searched our data for X-ray counterparts of CNe and determined their X-ray light curves and spectral properties. Additionally, we determined luminosity upper limits for all novae from previous studies which are not detected anymore and for all CNe in our field of view with optical outbursts between May 2005 and March 2007. Results. We detected eight X-ray counterparts of CNe in M 31, four of which were not previously known. Seven sources can be classified as SSSs, one is a candidate SSS. Two SSSs are still visible more than nine years after the nova outburst, whereas two other nova counterparts show a short SSS phase of less than 150 days. Of the latter sources, M31N 2006-04a exhibits a short-time variable X-ray light curve with an apparent period of (1.6 ± 0.3) h. This periodicity could indicate the binary period of the system. There is no X-ray detection for 23 out of 25 CNe which were within the field of view of our observations and had their outburst from about one year before the start of the monitoring until its end. From the 14 SSS nova counterparts known from previous studies, ten are not detected anymore. Additionally, we found four SSSs in our XMM-Newton data without a nova counterpart, one of which is a new source. Conclusions. Out of eleven SSSs detected in our monitoring, seven are counterparts of CNe. We therefore confirm the earlier finding that CNe are the major class of SSSs in the central region of M 31. We use the measured SSS turn-on and turn-off times to estimate the mass ejected in the nova outburst and the mass burned on the white dwarf. Classical novae with short SSS phases seem to be an important contributor to the overall population.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1051/0004-6361/201014710DOIArticle
ORCID:
AuthorORCID
Henze, M.0000-0001-9985-3406
Della Valle, M.0000-0003-3142-5020
Rau, A.0000-0001-5990-6243
Additional Information:© 2010 ESO. Received 1 April 2010, Accepted 15 August 2010, Published online 18 November 2010. Partly based on observations with XMM-Newton, an ESA Science Mission with instruments and contributions directly funded by ESA Member States and NASA. We wish to thank the referee, Jan-Uwe Ness, for his constructive comments, which helped to improve the clarity of the manuscript. The X-ray work is based in part on observations with XMM-Newton, an ESA Science Mission with instruments and contributions directly funded by ESA Member States and NASA. The XMM-Newton project is supported by the Bundesministerium für Wirtschaft und Technologie / Deutsches Zentrum für Luft- und Raumfahrt (BMWI/DLR FKZ 50 OX 0001) and the Max-Planck Society. M. Henze acknowledges support from the BMWI/DLR, FKZ 50 OR 0405. A.R. acknowledges support from SAO grant GO9-0024X. M. Hernanz acknowledges support from grants AYA2008-01839 and 2009-SGR-315. G.S. acknowledges support from grants AYA2008-04211-C02-01 and AYA2007-66256.
Funders:
Funding AgencyGrant Number
European Space Agency (ESA)UNSPECIFIED
NASAUNSPECIFIED
Bundesministerium fur Bildung und Forschung (BMBF)FKZ 50 OX 0001
Bundesministerium fur Bildung und Forschung (BMBF)FKZ 50 OR 0405
Max-Planck SocietyUNSPECIFIED
Smithsonian Astrophysical Observatory (SAO)GO9-0024X
Ministerio de Ciencia e Innovación (MCINN)AYA2008-01839
Ministerio de Ciencia e Innovación (MCINN)2009-SGR-315
Ministerio de Ciencia e Innovación (MCINN)AYA2008-04211-C02-01
Ministerio de Ciencia e Innovación (MCINN)AYA2007-66256
Deutsches Zentrum für Luft- und Raumfahrt (DLR)UNSPECIFIED
Subject Keywords:galaxies: individual: M 31 – novae, cataclysmic variables – X-rays: binaries – stars: general
Record Number:CaltechAUTHORS:20110118-132618486
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20110118-132618486
Official Citation:X-ray monitoring of classical novae in the central region of M 31 - I. June 2006–March 2007 M. Henze, W. Pietsch, F. Haberl, M. Hernanz, G. Sala, M. Della Valle, D. Hatzidimitriou, A. Rau, D. H. Hartmann, J. Greiner, V. Burwitz and J. Fliri A&A 523 A89 (2010) DOI: 10.1051/0004-6361/201014710
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:21791
Collection:CaltechAUTHORS
Deposited By: Benjamin Perez
Deposited On:18 Jan 2011 22:14
Last Modified:22 Nov 2019 00:51

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