| Issue |
A&A
Volume 432, Number 2, March III 2005
|
|
|---|---|---|
| Page(s) | 491 - 500 | |
| Section | Galactic structure, stellar clusters, and populations | |
| DOI | https://doi.org/10.1051/0004-6361:20041075 | |
| Published online | 02 March 2005 | |
The Vela-Puppis open clusters Pismis 8 and Pismis 13 *,**
1
Facultad de Ciencias Astronómicas y Geofísicas, UNLP, and IALP (UNLP - CONICET), Paseo del Bosque s/n, 1900, La Plata, Argentina e-mail: egiorgi@fcaglp.unlp.edu.ar
2
Dipartimento di Astronomia, Università di Padova, Vicolo Osservatorio 2, 35122 Padova, Italy
Received:
12
April
2004
Accepted:
31
October
2004
CCD UBVI imaging photometry was carried out in the
fields of the open clusters Pismis 8 and Pismis 13, located in the
Vela-Puppis region in our Galaxy. MK spectral
types have also been determined for a number of stars located in
the fields of these two clusters which were used to secure
membership among the brightest stars. Since our photometry
goes to a fainter limit than previous studies we could provide
better reddening, distance and age determinations. Both clusters
are located close to the edge of the local arm in the third
quadrant. Pismis 8 is a cluster about 5–7 My old located at 2000 pc from the Sun, while Pismis 13 was found at 2750 pc with a probable age of about 100 My. The estimate of the slopes of the
mass functions in both cases yielded 
and 
for Pismis 8 and 13 respectively.
Key words: Galaxy: open clusters and associations: individual: Pismis 8, Pismis 13 / stars: luminosity function, mass function / stars: Hertzsprung-Russell (H-R) and C-M diagrams
© ESO, 2005
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