Variable stars towards the bulge of M31: the AGAPE catalogue

R. Ansari; M. Auriere; P. Baillon; A. Bouquet; G. Coupinot; Ch. Coutures; C. Ghesquiere; Y. Giraud-Heraud; D. Gillieron; P. Gondolo; J. Hecquet; J. Kaplan; A. Kim; Y. Le Du; A.L. Melchior; M. Moniez; J.P. Picat; G. Soucail

HAL: in2p3-00022262, version 1

arXiv: astro-ph/0405402

DOI: 10.1051/0004-6361:20035659

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Astronomy and Astrophysics 421 (2004) 509-518

Variable stars towards the bulge of M31: the AGAPE catalogue

R. Ansari¹, M. Auriere², P. Baillon³, A. Bouquet⁴, G. Coupinot², Ch. Coutures⁵, C. Ghesquiere⁴, Y. Giraud-Heraud⁴, D. Gillieron², P. Gondolo, J. Hecquet², J. Kaplan⁴, A. Kim⁴, Y. Le Du⁴, A.L. Melchior⁶, M. Moniez¹, J.P. Picat², G. Soucail²

For the AGAPE collaboration(s)

(2004)

We present the AGAPE astrometric and photometric catalogue of 1579 variable stars in a 14'x10' field centred on M31. This work is the first survey devoted to variable stars in the bulge of M31. The R magnitudes of the objects and the B-R colours suggest that our sample is dominated by red long-period variable stars (LPV), with a possible overlap with Cepheid-like type II stars. Twelve nova candidates are identified. Correlations with other catalogues suggest that 2 novae could be recurrent novae and provide possible optical counterparts for 2 supersoft X-ray sources candidates observed with Chandra.

1:	LAL - Laboratoire de l'Accélérateur Linéaire

2:	LATT - Laboratoire d'Astrophysique de l'Observatoire Midi-Pyrénées

3:	CERN - European Organization for Nuclear Research

4:	PCC - Physique Corpusculaire et Cosmologie - Collège de France

5:	DAPNIA - Département d'Astrophysique, de physique des Particules, de physique Nucléaire et de l'Instrumentation Associée

6:	LERMA - Laboratoire d'Etude du Rayonnement et de la Matière en Astrophysique

Subject(s)

Physics/Astrophysics/Cosmology and Extra-Galactic Astrophysics

Sciences of the Universe/Astrophysics

Keyword(s) : galaxies: individual: M 31 – cosmology: dark matter – stars: variables: general – stars: novae – cataclysmic variables – stars: variables: Cepheids – X-rays: stars

Fulltext link:

http://fr.arXiv.org/abs/astro-ph/0405402


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Submitted on: Thursday, 14 December 2006 13:06:37
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