A UV image of M 31.
Abstract
A UV(2000 A) picture of the Andromeda galaxy (M31) was obtained from a balloon-borne experiment. In addition to the central region of the galaxy, the general spiral structure is seen as a ring which coincides with the distribution of the OB associations and H II regions. The elliptical companion NGC 205 is also barely detected. The fluxes of this galaxy NGC 205 and of NGC 206, a bright association in the spiral structure of M31, are found compatible with their known stellar content. For the central part of M31, the flux is in agreement with previous determinations. Detailed analysis confirms the diffuse aspect of this central region and reveals a well peaked luminosity distribution. Possible origins for the central UV radiation are also discussed.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- August 1980
- Bibcode:
- 1980A&A....88...52D
- Keywords:
-
- Andromeda Galaxy;
- Astronomical Photography;
- Ultraviolet Radiation;
- B Stars;
- Balloon-Borne Instruments;
- Brightness;
- H Ii Regions;
- O Stars;
- Spiral Galaxies;
- Astrophysics