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The physical parameters of clumps associated with class I methanol masers

Ladeyschikov, Dmitry A., Urquhart, James S., Sobolev, Andrey M., Breen, Shari L., Bayandina, Olga S. (2020) The physical parameters of clumps associated with class I methanol masers. Astrophysical Journal, 160 (5). Article Number 213. ISSN 0004-637X. (doi:10.3847/1538-3881/abb770) (KAR id:82847)


We present a study of the association between class I methanol masers and cold dust clumps from the ATLASGAL survey. It was found that almost 100% of class I methanol masers are associated with objects listed in the ATLASGAL compact source catalog. We find a statistically significant difference in the flux density, luminosity, number and column density and temperature distributions of ATLASGAL sources associated with 95/44 GHz methanol masers compared with those ATLASGAL sources devoid of 95 GHz methanol masers. The masers tend to arise in clumps with higher densities, luminosities and temperatures compared with both the full sample of ATLASGAL clumps, as well as the sample of ATLASGAL sources that were cross-matched with positions previously searched for methanol masers but with no detections. Comparison between the peak position of ATLASGAL clumps and the interferometric positions of the associated class I and II methanol masers reveals that class I masers are generally located at larger physical distances from the peak submillimetre emission than class II masers. We conclude that the tight association between ATLASGAL sources and class I methanol masers may be used as a link toward understanding the conditions of the pumping of these masers and evolutionary stages at which they appear.

Item Type: Article
DOI/Identification number: 10.3847/1538-3881/abb770
Uncontrolled keywords: masers — ISM: dust, extinction — submillimeter: ISM — astronomical databases: miscellaneous
Subjects: Q Science > QB Astronomy
Divisions: Divisions > Division of Natural Sciences > Physics and Astronomy
Depositing User: James Urquhart
Date Deposited: 10 Sep 2020 08:55 UTC
Last Modified: 04 Mar 2024 19:09 UTC
Resource URI: (The current URI for this page, for reference purposes)

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