Issue |
Astron. Astrophys. Suppl. Ser.
Volume 126, Number 2, December I 1997
|
|
---|---|---|
Page(s) | 357 - 364 | |
DOI | https://doi.org/10.1051/aas:1997270 | |
Published online | 15 December 1997 |
Photometrically determined membership of the young, open cluster IC 2391*
Armagh Observatory, College Hill, Armagh BT61 9DG, N. Ireland
Send offprint request to: W.R.J. Rolleston
Received:
23
February
1996
Accepted:
20
March
1997
New 4-colour CCD photometry to a limiting magnitude of
is presented for 1428 objects observed towards the direction
of the young, open cluster IC 2391. We observed 36 (
) fields
within 17 arcmin of the nominal cluster core. By fitting the theoretical
isochrones of D'Antona & Mazzitelli (1994) to a combination of
colour-magnitude and colour-colour diagrams, we have identified 17 stars
as probable cluster members with a further 85 stars as possible members.
The brightness distribution of low-mass members is compared with the
luminosity function observed for the Pleiades and we estimate that the
contamination due to background giants should be small.
Key words: stars: evolution / stars: late-type / open clusters: individual: IC 2391
© European Southern Observatory (ESO), 1997