Photometric and kinematic studies of open star clusters. I. NGC 581 (M 103)
Abstract
We present CCD photometry and a proper motion study of the young open star cluster, NGC 581 (M 103). Fitting isochrones to the colour magnitude diagram, we found an age of 16 +/- 4 Myr and a distance of roughly 3 kpc for this cluster. The proper motion study identifies 77 stars of V=14.5 mag or brighter to be cluster members. We combine membership determination by proper motions and statistical field star subtraction to derive the IMF of the cluster and find a quite steep slope of Gamma =-1.80.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- September 1999
- DOI:
- arXiv:
- arXiv:astro-ph/9908059
- Bibcode:
- 1999A&A...349..448S
- Keywords:
-
- GALAXY: OPEN CLUSTERS AND ASSOCIATIONS: INDIVIDUAL: NGC 581 (M 103);
- ASTROMETRY;
- STARS: KINEMATICS;
- STARS: HERTZSPRUNG-RUSSEL (HR) AND C-M DIAGRAMS;
- STARS: LUMINOSITY FUNCTION;
- MASS FUNCTION;
- Astrophysics
- E-Print:
- 9 pages, 11 figures, accepted for publication in Astronomy &