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Interferometric study of the class I methanol masers at 104.3 GHz

Published online by Cambridge University Press:  07 February 2024

M. A. Voronkov Open the ORCID record for M. A. Voronkov [Opens in a new window] ,
S. L. Breen ,
S. P. Ellingsen Open the ORCID record for S. P. Ellingsen [Opens in a new window] ,
A. M. Sobolev  and
D. A. Ladeyschikov
M. A. Voronkov*
Affiliation:
CSIRO Space & Astronomy, PO Box 76, Epping, NSW 1710, Australia.
S. L. Breen
Affiliation:
SKAO, Jodrell Bank, Lower Withington, Macclesfield, Cheshire SK11 9FT, UK
S. P. Ellingsen
Affiliation:
School of Natural Sciences, University of Tasmania, Private Bag 37, Hobart, Tasmania 7001, Australia
A. M. Sobolev
Affiliation:
Ural Federal University, 19 Mira street, 620002 Ekaterinburg, Russia
D. A. Ladeyschikov
Affiliation:
Ural Federal University, 19 Mira street, 620002 Ekaterinburg, Russia
*
email: [email protected]
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Abstract

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The Australia Telescope Compact Array (ATCA) has been used for an interferometric follow up observation at 104.3 GHz of the targets where either this or the 9.9-GHz maser was previously detected. We confirm the significant difference (by more than 1.5 orders of magnitude) from source to source of the flux density ratio for these two maser transitions. Based on the morphology and location of continuum sources, the most likely explanation of this discrepancy is the difference in the flux density of the seed radiation at the two frequencies. We also report absolute positions (with arcsec accuracy) for all detected 104.3 GHz masers.

Keywords

masersstars: formationHii regions
Type
Poster Paper
Information
Proceedings of the International Astronomical Union , Volume 18 , Symposium S380: Cosmic Masers: Proper Motion toward the Next-Generation Large Projects , December 2022 , pp. 252 - 254
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Creative Commons
Creative Common License - CCCreative Common License - BY
This is an Open Access article, distributed under the terms of the Creative Commons Attribution licence (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted re-use, distribution and reproduction, provided the original article is properly cited.
Copyright
© The Author(s), 2024. Published by Cambridge University Press on behalf of International Astronomical Union

References

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