A study of the maser source NML CYG

Details A study of the maser source NML CYG A study of the maser source NML CYG

Jun 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981cha%26a...5..139z&link_type=abstract

Chinese Astronomy and Astrophysics, Volume 5, Issue 2, p. 139-146.

Astronomy and Astrophysics

Astrophysics

1

Scientific paper

In analysing Masheder's observations of the OH 1612 MHz maser source in the direction of NML Cyg, I introduce a new idea, namely that the red-shifted and blue-shifted components originate in different shells of the circumstellar envelope. A self-consistent picture of velocity field, mass loss rate, coherent length and pumping mechanism is then obtainable which agrees with all the observations. The SiO non-maser emission appears to be a good indicator of the radial velocity of the central star and the velocity field of the envelope.

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