Produktnummer:
182f6aa102cfd64d248c09340c33962bf1
| Themengebiete: | Main sequence cluster clustering density gravitation gravity photometry planet spectroscopy star |
|---|---|
| Veröffentlichungsdatum: | 23.08.2014 |
| EAN: | 9783662224823 |
| Sprache: | Englisch |
| Seitenzahl: | 309 |
| Produktart: | Kartoniert / Broschiert |
| Herausgeber: | Tinney, Christopher G. |
| Verlag: | Springer Berlin |
| Untertitel: | Proceedings of the ESO Workshop Held in Garching, Germany, 10–12 August 1994 |
Produktinformationen "The Bottom of the Main Sequence — And Beyond"
The proceedings of this workshop should probably be prefaced with a few words on some of the more confusing jargon. The phrases "Very Low-Mass star" , "VLM star", or simply "VLM" are now used fairly uniformly by as tronomers studying the stars at the bottom of the hydrogen-burning stellar main sequence - unfortunately, however, there is no clear definition as to what constitutes a VLM star. The reader should be warned that VLM stars are variously considered to be stars with; masses less than 0.3M ; masses 0 less than 0.1M ; spectra later than about M6-7; luminosities fainter than 0 Mv = 15; or luminosities fainter than Mbol = 12. The important features of a VLM star, however, would seem to be (1) that it is about as faint as a star can be, and (2) that it still remains a star (ie. it still burns hydrogen) . All of the above criteria, therefore, would seem to qualify an object as a VLM star, and requiring a more stringent definition is probably quibbling.
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