Local kinetic properties of Population I (B5-F5)-type stars and galactic disk evolution

Details Local kinetic properties of Population I (B5-F5)-type stars and galactic disk evolution Local kinetic properties of Population I (B5-F5)-type stars and galactic disk evolution

Sep 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990a%26a...236...95g&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 236, no. 1, Sept. 1990, p. 95-98.

Statistics

Computation

32

A Stars, Disk Galaxies, F Stars, Galactic Evolution, Solar Velocity, Algorithms, Computational Astrophysics, Distribution Functions, Star Formation, Velocity Distribution

Scientific paper

Using a sample of (B5-F5) V type stars, located up to 250 pc, the basic parameters of the velocity ellipsoid have been derived. The observed distribution function of the peculiar velocities for different subsamples have been decomposed into a sum of three-dimensional Gaussians using the SEM algorithm (Celeux and Diebolt, 1985, 1986). Assuming that the stars are formed in bursts, the observed velocity distribution is explained as the sum of several independent (approximately spherical) distributions, each one corresponding to one generation of stars.

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