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Identification of Class I Methanol Masers with Objects of Near and Mid-Infrared Bands and the Third Version of the Class I Methanol Maser (MMI) Catalog

Published online by Cambridge University Press:  24 July 2012

Olga Bayandina ,
Irina Val'tts  and
Grigorii Larionov
Olga Bayandina
Affiliation:
Astro Space Center of the Lebedev Physical Institute, Moscow, Russia email: [email protected]
Irina Val'tts
Affiliation:
Astro Space Center of the Lebedev Physical Institute, Moscow, Russia email: [email protected]
Grigorii Larionov
Affiliation:
Astro Space Center of the Lebedev Physical Institute, Moscow, Russia email: [email protected]
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Abstract

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An identification has been conducted of class I methanol masers with 1) short-wave infrared objects EGO (extended green objects) - tracer bipolar outflow of matter in young stellar objects, and 2) isolated pre-protostellar gas-dust cores of the interstellar medium which are observed in absorption in the mid-infrared in the Galactic plane. It is shown that more than 50% of class I methanol masers are identified with bipolar outflows, considering the EGO as bipolar outflows (as compared with the result of 22% in the first version of the MMI catalog that contains no information about EGO). 99 from 139 class I methanol masers (71%) are identified with SDC. Thus, it seems possible that the MMI can be formed in isolated self-gravitating condensations, which are the silhouette of dark clouds - IRDC and SDC.

Keywords

Maserscatalogues
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 8 , Symposium S287: Cosmic Masers - from OH to H0 , January 2012 , pp. 280 - 281
Copyright
Copyright © International Astronomical Union 2012

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