Additional radial velocities of maser stars and related M supergiants

Details Additional radial velocities of maser stars and related M supergiants Additional radial velocities of maser stars and related M supergiants

Apr 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980pasp...92..183w&link_type=abstract

Astronomical Society of the Pacific, Publications, vol. 92, Apr.-May 1980, p. 183-187.

Astronomy and Astrophysics

Astronomy

7

M Stars, Masers, Radial Velocity, Red Giant Stars, Stellar Motions, Supergiant Stars, Variable Stars, Absorption Spectra, Emission Spectra, K Lines, Spectral Resolution, Stellar Envelopes, Stellar Spectra

Scientific paper

New radial-velocity data for late supergiants with maser emission, long-period variable maser stars, and similar nonmaser stars are presented. For VY CMa, 20 years of data are made use of to show that a correlation exists between the measured radial velocity and the spectral resolution. The correlation may be explained by reflection of starlight from moving dust in agreement with the line-profile calculations of van Blerkom and van Blerkom (1978). For the long-period variables, radial velocities of the K I resonance lines on 4 A/mm spectrograms strengthen the correlation between the circumstellar absorption lines and the violet edge of the thermal microwave emission.

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