Multicolour UBVRI photometry of stars in M17.
Abstract
Multicolor UBVRI photometry of stars towards M 17 demonstrate the existence of a young stellar group with partly heavily obscured O and B stars in this region. The photometric distance of this cluster is found to be 2.2 + or - 0.2 kpc. The photometric data can only be interpreted by assuming an abnormal reddening law with R equals 4.2 inside the dark cloud of M 17. The problem of the energy balance of M 17 is discussed by means of the observed early type stars.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- November 1980
- Bibcode:
- 1980A&A....91..186C
- Keywords:
-
- Early Stars;
- Hertzsprung-Russell Diagram;
- Hydrogen Clouds;
- Interstellar Extinction;
- Stellar Spectra;
- Stellar Spectrophotometry;
- Astronomical Photography;
- B Stars;
- O Stars;
- Stellar Luminosity;
- Ubv Spectra;
- Astrophysics