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Multi-wavelength maser observations of the Extended Green Object G19.01—0.03

Published online by Cambridge University Press:  07 February 2024

Gwenllian M. Williams Open the ORCID record for Gwenllian M. Williams [Opens in a new window] ,
Claudia J. Cyganowski Open the ORCID record for Claudia J. Cyganowski [Opens in a new window] ,
Crystal L. Brogan Open the ORCID record for Crystal L. Brogan [Opens in a new window] ,
Todd R. Hunter Open the ORCID record for Todd R. Hunter [Opens in a new window] ,
John D. Ilee ,
Pooneh Nazari  and
Rowan J. Smith
Gwenllian M. Williams*
Affiliation:
School of Physics & Astronomy, The University of Leeds, Leeds, LS2 9JT, UK
Claudia J. Cyganowski
Affiliation:
Scottish Universities Physics Alliance (SUPA), School of Physics and Astronomy, University of St Andrews, North Haugh, St Andrews, KY16 9SS, UK
Crystal L. Brogan
Affiliation:
National Radio Astronomy Observatory (NRAO), 520 Edgemont Rd, Charlottesville, VA 22903, USA
Todd R. Hunter
Affiliation:
National Radio Astronomy Observatory (NRAO), 520 Edgemont Rd, Charlottesville, VA 22903, USA
John D. Ilee
Affiliation:
School of Physics & Astronomy, The University of Leeds, Leeds, LS2 9JT, UK
Pooneh Nazari
Affiliation:
Leiden Observatory, Leiden University, PO Box 9513, 2300 RA Leiden, NL
Rowan J. Smith
Affiliation:
Jodrell Bank Centre for Astrophysics, Department of Physics and Astronomy, University of Manchester, Oxford Road, Manchester, M13 9PL, UK
*
email: G.M.Williams@leeds.ac.uk
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Abstract

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We report the detections of NH3(3,3) and 25 GHz and 278.3 GHz class I CH3OH maser emission associated with the outflow of the Extended Green Object G19.01–0.03 in sub-arcsecond resolution Atacama Large Millimeter/submillimeter Array (ALMA) and Karl G. Jansky Very Large Array (VLA) observations. For masers associated with the outer outflow lobes (> 12.5 ″ from the central massive young stellar object; MYSO), the spatial distribution of the NH3(3,3) masers is statistically indistinguishable from that of previously known 44 GHz Class I CH3OH masers, strengthening the connection of NH3(3,3) masers to outflow shocks. In sub-arcsecond resolution VLA observations, we resolve the 6.7 GHz Class II CH3OH maser emission towards the MYSO into a partial, inclined ring, with a velocity gradient consistent with the rotationally supported circumstellar disc traced by thermal gas emission.

Keywords

masersstars: individual: G19.01-0.03stars: formationstars: massivestars: protostarstechniques: interferometric
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. 261 - 263
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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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