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

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

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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
Externally published	Yes

Keywords

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

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10.1017/S174392132300220XLicence: CC BY

ArticleFinal published version, 490 KBLicence: CC BY

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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.",

year = "2024",

month = feb,

day = "7",

doi = "10.1017/S174392132300220X",

language = "English",

volume = "18",

pages = "261--263",

journal = "Proceedings of the International Astronomical Union",

issn = "1743-9221",

publisher = "Cambridge University Press",

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TY - JOUR

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 - https://www.scopus.com/pages/publications/85185779048

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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