On the distances and velocities of M supergiants associated with OH and H2O emission sources

Details On the distances and velocities of M supergiants associated with OH and H2O emission sources On the distances and velocities of M supergiants associated with OH and H2O emission sources

Jun 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975pasp...87..433h&link_type=abstract

Astronomical Society of the Pacific, Publications, vol. 87, June 1975, p. 433-437.

Astronomy and Astrophysics

Astronomy

45

Hydroxyl Emission, M Stars, Radial Velocity, Supergiant Stars, Water Vapor, Astronomical Models, Distance, Masers, Stellar Envelopes, Stellar Motions, Stellar Spectra

Scientific paper

New radial velocities for S Per, PZ Cas, and VY CMa are included in a discussion of the distances and velocities of M supergiants which are also OH and H2O emission sources. It is shown that S Per and PZ Cas are probably associated with Per OB1 and Cas OB5, respectively. The peculiar star VY CMa may be associated with NGC 2362 and tau CMa or the more distant cluster NGC 2439. The available data on the velocities and distances of these M supergiants appear to support theoretical models for the maser emission in which the true velocity of the source is at or near the center of the OH velocity structure.

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