Physics
Scientific paper
Jun 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995azh....72..333d&link_type=abstract
Astronomicheskij Zhurnal, vol. 72, p. 333
Physics
Stellar Physics, Gas Dynamics, Milky Way Galaxy, Celestial Sphere, Open Clusters, Galactic Structure, Stellar Mass, Early Stars, Stellar Evolution
Scientific paper
Parameters of geometric models of 11 gas-star complexes (GSCs) were obtained. We used information about GSC projections onto the celestial sphere and the Galactic plane and about GSC extension along the line of sight. GSCs were represented as triaxial ellipsoids. To estimate the semiminor axis of the GSC ellipsoidal model and GSC slope angle to the Galactic plane, we used data on spatial location of open stellar clusters (OSCs) entering GSCs. GSC slopes to the Galactic plane vary between 2.5 and 20.5 deg. Their semiminor axes are between 11 and 164 pc. GSC total masses are estimated from GSC tidal effect on OSCs that are members of the corresponding GSCs. The effect manifests itself in smaller sizes of young OSCs as compared to their tidal sizes in the force field of the Galaxy. We used studies of stability of an OSC moving in the joint force field of the Galaxy and spheroidal stationary GSC, as well as studies of evolution of a virialized cluster located at the center of a nonstationary ellipsoidal GSC. Estimated total masses for different GSCs lie between 0.65 x 10 exp 5 solar masses and 11.5 x 10 exp 7 solar masses.
Danilov Mikhail V.
Seleznev Anton F.
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