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Ubiquitous millimeter-wavelength Class I methanol masers associated with massive (proto)stellar outflows: ALMA and SMA results

Published online by Cambridge University Press:  16 July 2018

C. J. Cyganowski ,
D. Hannaway ,
C. L. Brogan ,
T. R. Hunter  and
Q. Zhang
C. J. Cyganowski
Affiliation:
Scottish Universities Physics Alliance (SUPA), School of Physics and Astronomy, University of St. Andrews, North Haugh, St. Andrews, Fife KY16 9SS, UK email: [email protected]
D. Hannaway
Affiliation:
Scottish Universities Physics Alliance (SUPA), School of Physics and Astronomy, University of St. Andrews, North Haugh, St. Andrews, Fife KY16 9SS, UK email: [email protected]
C. L. Brogan
Affiliation:
NRAO, 520 Edgemont Rd, Charlottesville, VA 22903, USA
T. R. Hunter
Affiliation:
NRAO, 520 Edgemont Rd, Charlottesville, VA 22903, USA
Q. Zhang
Affiliation:
Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USA
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Abstract

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We report the discovery of widespread millimeter-wavelength Class I methanol maser emission associated with protostellar molecular outflows in the massive (proto)cluster G11.92−0.61. Our ~0.5″-resolution SMA and ALMA observations of the 229 GHz and 278 GHz Class I transitions reveal seven and twelve candidate masers, respectively: all 229 GHz masers have 278 GHz counterparts, and five are also coincident with 44 GHz Class I masers previously detected with the VLA. For paired masers, the peak intensities at 229 GHz and 278 GHz are correlated. We also find tentative evidence for a correlation between the strength of millimeter-wavelength Class I maser emission and the energy of the associated molecular outflow.

Keywords

masersISM: individual objects (G11.92-0.61)ISM: moleculesISM: jets and outflowsstars: formationtechniques: interferometric
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 13 , Symposium S336: Astrophysical Masers: Unlocking the Mysteries of the Universe , September 2017 , pp. 281 - 282
Copyright
Copyright © International Astronomical Union 2018 

References

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