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G305.8 - 0.2: A Young Object with a Dust and Gas Envelope

Published online by Cambridge University Press:  07 August 2017

J.W.S. Vilas Boas ,
E. Scalise Jr. ,
G.G. Sanzovo ,
G. Mendes Pacheco  and
A.M. Gómez Balboa
J.W.S. Vilas Boas
Affiliation:
SCT - INPE - DAS, CP 515, 12201 S.J.Campos, SP;
E. Scalise Jr.
Affiliation:
SCT - INPE - DAS, CP 515, 12201 S.J.Campos, SP;
G.G. Sanzovo
Affiliation:
Univ. Est. de Londrina, Depart. de Física, 86020 Londrina, PR;
G. Mendes Pacheco
Affiliation:
SCT - INPE - DAS, CP 515, 12201 S.J.Campos, SP;
A.M. Gómez Balboa
Affiliation:
SCT - INPE - DAS, CP 515, 12201 S.J.Campos, SP;

Abstract

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The H2O maser source in G305.8 - 0.2 was first detected by Haynes et al. (1984). Inspection of the Southern Hemisphere radio surveys did not show any strong compact HII region or water maser placed nearby this source. The IRAS point source catalog (2.0) shows a strong source in the direction of the maser. We analysed the temporal variation and line profile of the H2O maser emission and discussed the nature of its associated IRAS source. These source characteristics seem compatible with the hypothesis that the maser is associated with a protostellar disk around an early-type star of spectral type 07 to 09 surrounded by a spherical shell of gas and dust.

Type
Near Stellar Environments
Information
Symposium - International Astronomical Union , Volume 150: Astrochemistry of Cosmic Phenomena , 1992 , pp. 405 - 406
Copyright
Copyright © Kluwer 1992 

References

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