Why not make dust in photospheres of M stars
Abstract
Contrary to previous expectations based on plane-stratifed model atmospheres, calculations of photospheres taking spherical extension properly into account indicate that surface temperatures of late M type stars of low mass and high luminosity fall below the condensation temperature of Al2O3. Therefore, the formation of the observed circumstellar dust in M giants and supergiants with normal solar-type O/C ratio, equal to about 2, might occur in these upper photospheres.
- Publication:
-
Physical Processes in Red Giants
- Pub Date:
- 1981
- DOI:
- 10.1007/978-94-009-8492-9_36
- Bibcode:
- 1981ASSL...88..341S
- Keywords:
-
- Cosmic Dust;
- Late Stars;
- M Stars;
- Photosphere;
- Stellar Envelopes;
- Stellar Temperature;
- Aluminum Oxides;
- Stellar Luminosity;
- Stellar Mass;
- Supergiant Stars;
- Surface Temperature;
- Astrophysics