Evolution of the double peak spectra for OH-1612 MHz maser emission on the AGB.

Details Evolution of the double peak spectra for OH-1612 MHz maser emission on the AGB. Evolution of the double peak spectra for OH-1612 MHz maser emission on the AGB.

Dec 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990acasn..31..366s&link_type=abstract

Acta Astron. Sin., Vol. 31, No. 4, p. 366 - 374

Astronomy and Astrophysics

Astronomy

Oh Masers: Stellar Models, Oh Masers: Mass Loss, Oh Masers: Line Formation

Scientific paper

Based on observations of AGB stars associated with 1612 MHz OH masers, the evolution of the double peak spectra for 1612 MHz OH maser emission is studied from a model, in which the mass loss rates varied with time on the AGB. The theoretical relations between the OH shell radius R0 and the mass loss rate M˙ and between the OH maser luminosity LOH and M are also obtained. These relations are in agreement with empirical relations established from observation. The model also indicates that the OH emission can last over 100 - 500 years after the termination of the AGB. This timescale can be regarded as the lifetime of the OHPN phase.

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