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

Gwenllian M. Williams; Claudia J. Cyganowski; Crystal L. Brogan; Todd R. Hunter; John D. Ilee; Pooneh Nazari; Rowan J. Smith

doi:10.1017/S174392132300220X

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

Gwenllian M. Williams, Claudia J. Cyganowski, Crystal L. Brogan, Todd R. Hunter, John D. Ilee, Pooneh Nazari, Rowan J. Smith

Department of Physics

Research output: Contribution to journal › Article › peer-review

Abstract

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.

Original language	English
Pages (from-to)	261-263
Number of pages	3
Journal	Proceedings of the International Astronomical Union
Volume	18
DOIs	https://doi.org/10.1017/S174392132300220X
Publication status	Published - 07 Feb 2024

Keywords

masers
stars: formation
stars: individual: G19.01-0.03
stars: massive
stars: protostars
techniques: interferometric

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@article{8bfb117402ef42638547b34e4a593f2c,

title = "Multi-wavelength maser observations of the Extended Green Object G19.01—0.03",

abstract = "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 = "masers, stars: formation, stars: individual: G19.01-0.03, stars: massive, stars: protostars, techniques: interferometric",

author = "Williams, {Gwenllian M.} and Cyganowski, {Claudia J.} and Brogan, {Crystal L.} and Hunter, {Todd R.} and Ilee, {John D.} and Pooneh Nazari and Smith, {Rowan J.}",

note = "Publisher Copyright: {\textcopyright} The Author(s), 2024. Published by Cambridge University Press on behalf of International Astronomical Union.",

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doi = "10.1017/S174392132300220X",

language = "English",

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T1 - Multi-wavelength maser observations of the Extended Green Object G19.01—0.03

AU - Williams, Gwenllian M.

AU - Cyganowski, Claudia J.

AU - Brogan, Crystal L.

AU - Hunter, Todd R.

AU - Ilee, John D.

AU - Nazari, Pooneh

AU - Smith, Rowan J.

N1 - Publisher Copyright: © The Author(s), 2024. Published by Cambridge University Press on behalf of International Astronomical Union.

PY - 2024/2/7

Y1 - 2024/2/7

N2 - 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.

AB - 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.

KW - masers

KW - stars: formation

KW - stars: individual: G19.01-0.03

KW - stars: massive

KW - stars: protostars

KW - techniques: interferometric

UR - http://www.scopus.com/inward/record.url?scp=85185779048&partnerID=8YFLogxK

U2 - 10.1017/S174392132300220X

DO - 10.1017/S174392132300220X

M3 - Article

SN - 1743-9221

VL - 18

SP - 261

EP - 263

JO - Proceedings of the International Astronomical Union

JF - Proceedings of the International Astronomical Union

ER -

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

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Keywords

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