Ten-year observations of the H2O maser in S 140

Details Ten-year observations of the H2O maser in S 140 Ten-year observations of the H2O maser in S 140

Aug 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993azh....70..731l&link_type=abstract

Astronomicheskij Zhurnal, vol. 70, p. 731

Astronomy and Astrophysics

Astronomy

18

Interstellar Masers, Star Formation, Water Masers, Radial Velocity, Radio Telescopes, Very Long Base Interferometry

Scientific paper

Homogeneous systematic observations of the 1.35-cm H2O maser in S 140, performed during 1981-1982 with the 22-m radio telescope of the Radio Astronomic Station of the Lebedev Physical Institute at Pushchino, are reported. The maser emission is localized in three narrow, symmetrically spaced intervals of radial velocity, and this is interpreted as a result of maser amplification in a Keplerian (protoplanetary?) disk surrounding a young star. The observed anticorrelation of the intensities of the central and the side components, as well as the weak anticorrelation of the two side components, is explained by the maser mode competition in a partly saturated maser with a variable pumping rate.

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