An investigation of the maser radiations from NML CYG at OH 1612 MHz

Details An investigation of the maser radiations from NML CYG at OH 1612 MHz An investigation of the maser radiations from NML CYG at OH 1612 MHz

Sep 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980acasn..21..211z&link_type=abstract

Acta Astronomica Sinica, vol. 21, Sept. 1980, p. 211-218. In Chinese, with abstract in English.

Astronomy and Astrophysics

Astronomy

1

Hydroxyl Emission, Infrared Stars, Maser Outputs, Stellar Radiation, Supergiant Stars, Air Flow, M Stars, Mass Flow Rate, Radial Velocity, Red Shift, Silicon Oxides, Stellar Envelopes, Stellar Mass Ejection, Stellar Models, Velocity Distribution

Scientific paper

A spherical symmetry model of the airflow velocity field in the circumferential envelope of NML Cyg was constructed by Masheder's (1974) LBI observation of maser radiations at OH 1612 MHz. The observations showed that the redshift and blueshift components are derived from different shells of the circumferential envelope. Based on this model, the mass loss rate, coherent length, and the pumping mechanism are discussed, showing agreement with the observations. It is concluded that the SiO nonmaser radiation is a good indicator of the radial velocity and of the airflow velocity field of the circumstellar envelope in an infrared star.

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