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0″.4 BIMA Array Mapping of the 107 GHz Methanol Maser in W3(OH)

Published online by Cambridge University Press:  12 April 2016

V. I. Slysh ,
I. E. Val’tts ,
S. V. Kalenskii ,
G. M. Larionov  and
L. G. Mundy
V. I. Slysh
Affiliation:
Astro Space Center, Lebedev Physical Institute, Moscow, Russia
I. E. Val’tts
Affiliation:
Astro Space Center, Lebedev Physical Institute, Moscow, Russia
S. V. Kalenskii
Affiliation:
Astro Space Center, Lebedev Physical Institute, Moscow, Russia
G. M. Larionov
Affiliation:
Astro Space Center, Lebedev Physical Institute, Moscow, Russia
L. G. Mundy
Affiliation:
University of Maryland, College Park, MD, U.S.A.

Abstract

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Using A-configuration of the BIMA-array with 0″.4 angular resolution maps were obtained of the 107 GHz methanol line in W3(OH). The 107 GHz masers have their counterparts in another methanol transition at 6.7 GHz. The strongest maser spots are unresolved with the BIMA-array and are less than , which corresponds to the lower limit of the brightness temperature 5×105 K. A model of Class II methanol masers emitted in the extended atmosphere of icy planets orbiting around the O-star which excites H ɪɪ region is proposed.

Type
Research Article
Information
International Astronomical Union Colloquium , Volume 164: Radio Emission from Galactic and Extragalactic Compact Sources , 1998 , pp. 379 - 380
Copyright
Copyright © Astronomical Society of the Pacific 1998

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