Population of the galactic disc in the solar neighbourhood. I - Parameters of spatial distribution for stellar groups of A-K spectral and III-V luminosity classes

Details Population of the galactic disc in the solar neighbourhood. I - Parameters of spatial distribution for stellar groups of A-K spectral and III-V luminosity classes Population of the galactic disc in the solar neighbourhood. I - Parameters of spatial distribution for stellar groups of A-K spectral and III-V luminosity classes

Jan 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989ap%26ss.151..319k&link_type=abstract

Astrophysics and Space Science (ISSN 0004-640X), vol. 151, no. 2, Jan. 1989, p. 319-334.

Astronomy and Astrophysics

Astrophysics

3

Milky Way Galaxy, Solar Neighborhood, Star Distribution, Distance, Dwarf Stars, Error Analysis, Hertzsprung-Russell Diagram, Stellar Luminosity, Subgiant Stars

Scientific paper

Spatial density parameters of z-distribution and luminosity dispersion in the HR diagram for nine stellar spectral groups (A-K III, A-G IV, A-F V) were determined. It was shown that ali stars considered can be divided into two subsets according to their scale-height fi. For the younger stars fi is of the order of 100-150 pc, and for older ones of 300-400 pc. The accuracy of the parameters derived was evaluated with use of numerical simulations. We found that for subgiants and dwarfs the relative error in the local density makes 10 to 15%, and for giants it is a little higher (20 to 25%). For other parameters the typical error is of the order of 20-30%

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