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2. What is the IMF of faint stars?
- Creator:
- Piskunov, A. E. and Malkov, O. Yu.
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- astrophysics, initial main function (IMF), and lucal luminosity function (LF)
- Language:
- Czech
- Description:
- A number of effects which can affect the low-mass IMF derived from the local luminosity function is studied. We consider an influence of unresolved binairies, variations in fine structure of mass-luminosity relation, BC-scale, chemical composition, and evolution of brown dwarfs. The mass-luminosity relation is found to be the main factor defining the IMF. As analysis shows, different theoretical relations calculated for Pop I composition result in different IMFs /from a power law, to a lognormal one/. The presence at faintest magnitudes /Mν > 20^m/ of a large number of brown dwarfs, slowly evolving with decreasing luminosity, leads to the depletion of the luminosity function for both lognormal and power IMFs.
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/ and policy:public