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Astron. Astrophys. 335, L93-L96 (1998)


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Letter to the Editor

EROS variable stars: discovery of a slow nova in the SMC *

The EROS collaboration
P. de Laverny 1,** J.P. Beaulieu 2, M. Asplund 1,*** D. Kilkenny 3, C. Renault 3, R. Ferlet 4, J.B. Marquette 4, A. Vidal-Madjar 4, E. Maurice 5, L. Prévot 5, E. Aubourg 6, P. Bareyre 6, F. Bauer 6, S. Brehin 6, C. Coutures 6, J. de Kat 6, M. Gros 6, B. Laurent 6, M. Lachièze-Rey 6, E. Lesquoy 6, C. Magneville 6, A. Milsztajn 6, L. Moscoso 6, F. Queinnec 6, J. Rich 6, M. Spiro 6, L. Vigroux 6, S. Zylberajch 6, R. Ansari 7, F. Cavalier 7 and M. Moniez 7


1 Astronomiska Observatoriet, Box 515, S-751 20 Uppsala, Sweden
2 Kapteyn Institute, P.O. Box 800, 9700 AV Groningen, The Netherlands
3 South African Astronomical Observatory, P.O. Box 9, Observatory 7935, South Africa
4 Institut d'Astrophysique de Paris, CNRS, 98bis Boulevard. Arago, F-75014 Paris, France
5 Observatoire de Marseille, 2 place Le Verrier, F-13238 Marseille 03, France
6 CEA, DSM/DAPNIA, Centre d'études de Saclay, F-91191 Gif-sur-Yvette, France
7 Laboratoire de l'Accélérateur Linéaire IN2P3, Centre d'Orsay, F-91405 Orsay, France

Received 11 December 1997 / Accepted 27 February 1998

Abstract

We report the discovery of a slow nova found in the core of the Small Magellanic Cloud by the EROS microlensing survey. Nova SMC 1994  is a classical nova with a DQ Her type lightcurve characterized by a deep minimum. Low amplitude variations occuring on time-scales of hours and days are also detected at maximum light. Spectra collected during the nebular phase indicate that Nova SMC 1994  is similar to Galactic novae of the same class. Large helium enhancement in the shell is found and O and N enrichments are suspected.

Key words: surveys – stars: novae, cataclysmic variables – galaxies: Magellanic Clouds

* Based on observations collected at the European Southern Observatory, Chile.
** Present address: GRAAL, cc72, Université Montpellier II, Place Bataillon, F34095 Montpellier cedex05, France.
*** Present address: Nordita, Blegdamsvej 17, DK-2100 Copenhagen O, Denmark

Send offprint requests to: P. de Laverny (e-mail: laverny@astro.uu.se)

© European Southern Observatory (ESO) 1998

Online publication: June 26, 1998

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