The unusual methanol maser 345.01+1.79

Details The unusual methanol maser 345.01+1.79 The unusual methanol maser 345.01+1.79

Nov 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998astl...24..788v&link_type=abstract

Astronomy Letters, Volume 24, Issue 6, November 1998, pp.788-794; Pis'ma v Astronomicheskii Zhurnal, Vol. 24, p. 910

Astronomy and Astrophysics

Astronomy

7

Scientific paper

We analyze the spectra of G345.01+1.79 that were obtained during multi-frequency observations in class-I and class-II methanol lines at 44, 95, 107, 108, 133, 157, 165, and 229 GHz. We determine the relative positions of the condensations in which maser and thermal lines are formed. All strong class-II maser lines originate in the southern spot in the velocity interval -24 to -14 km s^-1. The thermal lines in class-II transitions are concentrated in the velocity interval of -14 to -11 km s^-1, which is closer to the velocity of the parent molecular cloud and the northern center of weak class-II maser emission. Although they have no peculiar velocity of the southern spot, the class-I masers spatially gravitate toward it. This is a unique source, the only one in which a maser has been detected at 108 GHz and one of a few in which a maser has been found at 157 GHz.

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