A DDO astrophysical study of NGC 752.
Abstract
DDO intermediate-band photometry of 11 red giants in the field of the sparsely populated open cluster NGC 752 is reported. Physical properties of the 11 stars, such as heavy-element abundances, surface gravities, and effective temperatures, are determined. A cluster age of 1.1 plus or minus 0.1 billion years is obtained by means of a comparison with Patenaude's (1978) theoretical isochrones. A true distance modulus of 7.9 plus or minus 0.2 mag is estimated for NGC 752, along with a true distance of 380 plus or minus 40 pc, an Fe/H abundance ratio of 0.0 plus or minus 0.1, and a red-giant mean mass of 1.5 plus or minus 0.2 solar masses. It is concluded that NGC 752 is on the metal-rich side of the distribution of intermediate and old open clusters, at about the same Fe/H value as NGC 7789 and halfway between NGC 2477 and NGC 2243.
- Publication:
-
The Astronomical Journal
- Pub Date:
- March 1979
- DOI:
- 10.1086/112425
- Bibcode:
- 1979AJ.....84..319H
- Keywords:
-
- Astronomical Observatories;
- Astrophysics;
- Red Giant Stars;
- Star Clusters;
- Stellar Spectrophotometry;
- Abundance;
- Cyanogen;
- Interstellar Extinction;
- Open Clusters;
- Stellar Gravitation;
- Stellar Magnitude;
- Stellar Mass;
- Stellar Temperature;
- Astrophysics;
- DDO Photometry:Open Clusters;
- Open Clusters:Ages;
- Open Clusters:Element Abundances;
- Open Clusters:Red Giants