Infrared photometry of upper main sequence stars in M39.
Abstract
Infrared photometry of 19 Main sequence stars in the open cluster M39 is presented. Infrared-infrared and optical-infrared color-color and color-magnitude diagrams are presented and compared with mean intrinsic color for Population I stars. An interstellar reddening of E(B - V) = 0.01 is obtained by analysis of the color-color diagrams. Comparison with a set of theoretical isochrones leads to an age estimate for the cluster between 240 and 480 million years.
- Publication:
-
Astronomy and Astrophysics Supplement Series
- Pub Date:
- March 1991
- Bibcode:
- 1991A&AS...87..419M
- Keywords:
-
- Infrared Photometry;
- Main Sequence Stars;
- Open Clusters;
- Binary Stars;
- Color-Color Diagram;
- Color-Magnitude Diagram;
- Interstellar Extinction;
- Radial Velocity;
- Stellar Spectrophotometry;
- Astrophysics