Variation of spectral features in the ON2 water maser

Details Variation of spectral features in the ON2 water maser Variation of spectral features in the ON2 water maser

Feb 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998a%26as..128....1m&link_type=abstract

Astronomy and Astrophysics Supplement, v.128, p.1-6

Astronomy and Astrophysics

Astrophysics

5

Ism: On2, Masers, Radio Lines: Ism

Scientific paper

Results are presented of the analysis of H_2O maser spectra in ON2, obtained with the RT-22 radio telescope at Pushchino during 1981-1996. The spectral features are analyzed and their time evolution examined. Anticorrelation between the fluxes of features with close radial velocities is found. A systematic displacement of the drifts sum of all features from 0.8 to -0.3 km s(-1) year(-1) during 1981-1988 and 1990-1996 is observed. In 1989 a fast jump of this parameter from -0.3 to 0.8 km s(-1) year(-1) took place. The quadratic sum of the drifts of the features always increased during a rise in maser activity. Possible causes of the observed phenomena are discussed.

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