A study of Mira variables - Implications of OH stars and galactic evolution

Details A study of Mira variables - Implications of OH stars and galactic evolution A study of Mira variables - Implications of OH stars and galactic evolution

Oct 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975a%26a....43..175f&link_type=abstract

Astronomy and Astrophysics, vol. 43, no. 2, Oct. 1975, p. 175-188.

Astronomy and Astrophysics

Astrophysics

36

Galactic Evolution, Giant Stars, Hydroxyl Emission, M Stars, Mira Variables, Variable Stars, Gravitational Collapse, Maximum Likelihood Estimates, Milky Way Galaxy, Radial Velocity, Stellar Motions

Scientific paper

A maximum likelihood method has been used to study the properties of type I OH Mira variables and the kinematical evolution of the Galaxy. The method takes into account dispersion in magnitude and employs proper motions and radial velocities. The V-I excess of type I OH stars with respect to non OH stars is confirmed, and interpreted in terms of a hot, circumstellar disk around the OH Mira variables. The results support the notion of a gradual flattening of the Galaxy as proposed by theories of collisional collapse.

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