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. Ansari 1, M. Auriere 2, P. Baillon 3, A. Bouquet 4, G. Coupinot 2, Ch. Coutures 5, C. Ghesquiere 4, Y. Giraud-Heraud 4, D. Gillieron 2, P. Gondolo, J. Hecquet 2, J. Kaplan 4, A. Kim 4, Y. Le Du 4, A.L. Melchior 6, M. Moniez 1, J.P. Picat 2, G. Soucail 2

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:	Laboratoire de l'Accélérateur Linéaire (LAL)
	CNRS : UMR8607 – IN2P3 – Université Paris XI - Paris Sud
2:	Laboratoire d'Astrophysique de l'Observatoire Midi-Pyrénées (LATT)
	CNRS : UMR5572 – INSU – Observatoire Midi-Pyrénées – Université Paul Sabatier [UPS] - Toulouse III
3:	European Organization for Nuclear Research (CERN)
	CERN
4:	Physique Corpusculaire et Cosmologie - Collège de France (PCC)
	CNRS : UMR7553 – IN2P3 – Université Paris VII - Paris Diderot
5:	Département d'Astrophysique, de physique des Particules, de physique Nucléaire et de l'Instrumentation Associée (DAPNIA)
	CEA : DSM/DAPNIA
6:	Laboratoire d'Etude du Rayonnement et de la Matière en Astrophysique (LERMA)
	CNRS : UMR8112 – INSU – Observatoire de Paris – Université Pierre et Marie Curie [UPMC] - Paris VI – Université de Cergy Pontoise – Ecole normale supérieure de Paris - ENS Paris

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

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From: Simone Lantz <>

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

Updated on: Thursday, 14 December 2006 14:55:07