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Astron. Astrophys. 320, L29-L32 (1997)


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Letter to the Editor

Pictoris revisited by Hipparcos

Star properties. *

F. Crifo 1, A. Vidal-Madjar 2, R.Lallement 3, R. Ferlet 2 and M. Gerbaldi 2, 4

1 DASGAL, URA 335 du CNRS, Observatoire de Paris-Meudon, Place Jules Janssen, F-92195 Meudon, France
2 Institut d'Astrophysique de Paris, CNRS, 98 bis Bd Arago, F-75014 Paris, France
3 Service d'Aéronomie du CNRS, B.P. 3, F-91371 Verrières le Buisson, France
4 Université de Paris-Sud XI

Received 17 January 1997 / Accepted 6 February 1997

Abstract

Observations with the Hipparcos satellite allowed a new determination of the [FORMULA] Pictoris distance. This star is located at [FORMULA], a value close to the upper limit of previous evaluations. The overall consequences are briefly discussed; in particular it is concluded that in the frame of standard stellar evolution models, there is no need for any intrinsic circumstellar extinction due to the dust disk to explain its position in the HR diagram. The star is very close to the ZAMS, or on the ZAMS, suggesting it is old enough to possess a well-formed planetary system.

Key words: Stars: circumstellar matter – Stars: fi Pictoris

* Based on observations obtained with the Hipparcos satellite

Send offprint requests to: F. Crifo

© European Southern Observatory (ESO) 1997

Online publication: June 30, 1998

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