About: 44 GHz methanol masers: Observations toward 95 GHz methanol masers

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An Entity of Type : schema:ScholarlyArticle, within Data Space : covidontheweb.inria.fr associated with source document(s)

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type	Academic Article research paper schema:ScholarlyArticle
isDefinedBy	Covid-on-the-Web dataset
title	44 GHz methanol masers: Observations toward 95 GHz methanol masers
Creator	Chen, Xi Li, Jingjing Xu, Ye Choi, Yoon Ellingsen, Simon »more»
source	ArXiv
abstract	We report a simultaneous 44 and 95 GHz class I methanol maser survey toward 144 sources from the 95 GHz class I methanol maser catalog. The observations were made with the three telescopes of the Korean very long baseline interferometry network operating in single-dish mode. The detection rates are 89% at 44 GHz and 77% at 95 GHz. There are 106 new discoveries at 44 GHz. Comparing the previous 95 GHz detections with new observations of the same transitions made using the Purple Mountain Observatory 13.7 m radio telescope shows no clear evidence of variability on a timescale of six years. Emission from the 44 and 95 GHz transitions shows strong correlations in peak velocity, peak flux density, and integrated flux density, indicating that they are likely cospatial. We found that the peak flux density ratio Spk,95/Spk,44 decreases as the 44 GHz peak flux density increases. We found that some class I methanol masers in our sample could be associated with infrared dark clouds, while others are associated with H II regions, indicating that some sources occur at an early stage of high-mass star formation, while others are located toward more evolved sources.
has issue date	2020-05-01(xsd:dateTime)
bibo:doi	10.3847/1538-4365/ab8b5b
has license	arxiv
sha1sum (hex)	28d9d563eb7e590cb1201b3558b71962a9484daa
schema:url	https://doi.org/10.3847/1538-4365/ab8b5b
resource representing a document's title	44 GHz methanol masers: Observations toward 95 GHz methanol masers
resource representing a document's body	covid:28d9d563eb7e590cb1201b3558b71962a9484daa#body_text
is schema:about of	named entity 'peak' named entity 'long' named entity 'dark clouds' named entity 'methanol' named entity 'masers' »more»

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