Rapid outbursts in the water maser Cepheus A

Details Rapid outbursts in the water maser Cepheus A Rapid outbursts in the water maser Cepheus A

Apr 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985a%26a...145..192m&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 145, no. 1, April 1985, p. 192-200.

Astronomy and Astrophysics

Astronomy

31

Interstellar Gas, Protostars, Radio Astronomy, Stellar Evolution, Water Masers, Infrared Radiation, Light Curve, Luminosity, Optical Thickness, Radial Velocity

Scientific paper

The authors have monitored the 22.2 GHz emission of the water maser in Cepheus A between October 1980 - October 1983. Several rapid bursts were observed with typical rise and fall times ranging from 3 to 30 d. Detailed observations are presented for one such burst which cover the event in April - May 1983 with time intervals of one or a few days. To model the intensity curve of the outburst the authors assume an instant release of radiation energy from a central (proto)star, leading to heating of the surrounding gas cloud where the water maser is located. A collisional pump model for the maser gives a good agreement with the observed intensity curve of the burst. This is in accordance with an equally good agreement obtained by Burke et al. (1978) between this model and the W3(OH) outburst.

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