ANS ultraviolet observations of external galaxies. I. Exciting stars of H II regions in the Large Magellanic Cloud.
Abstract
We present UV observations in the wavelength range A of the star clusters in several H ii regions belonging to the Large Magellanic Cloud (LMC). The early type stars (spectral types 0, B, and A) in these clusters are characterized by a moderately steep luminosity function that is close to the Salpeter-Sandage initial luminosity function for early type stars. We confirm the general shape of the reddening law as derived earlier by the use of a different method. The total luminosity of the 30 Dor star cluster is about 108 L0, while the luminosities of the other observed regions are 0.5-1.0 x 10 L0. The central object R136 contributes significantly to the excitation of 30 Dor. Subject headings: galaxies: Magellanic Clouds - luminosity function - nebulae: general - nebulae: individual - ultraviolet: spectra
- Publication:
-
The Astrophysical Journal
- Pub Date:
- June 1979
- DOI:
- 10.1086/157095
- Bibcode:
- 1979ApJ...230..390I
- Keywords:
-
- Astronomical Netherlands Satellite;
- H Ii Regions;
- Magellanic Clouds;
- Star Clusters;
- Stellar Luminosity;
- Ultraviolet Astronomy;
- Early Stars;
- Nebulae;
- Red Shift;
- Stellar Spectra;
- Ubv Spectra;
- Astrophysics;
- Early-Type Stars:Luminosity Function;
- H II Regions:Magellanic Clouds;
- Magellanic Clouds:UV Radiation