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VLA Observations of a Sample of Low-Brightness 6.7 GHz Methanol Masers

Published online by Cambridge University Press:  16 July 2018

Luca Olmi ,
Esteban D. Araya  and
Jason Armstrong
Luca Olmi
Affiliation:
INAF, Osservatorio Astrofisico di Arcetri, Largo E. Fermi 5, I-50125 Firenze, Italy email: olmi.luca@gmail.com
Esteban D. Araya
Affiliation:
Western Illinois University, Physics Department, 1 University Circle, Macomb, IL 61455, USA email: ed-araya@wiu.edu
Jason Armstrong
Affiliation:
Western Illinois University, Physics Department, 1 University Circle, Macomb, IL 61455, USA email: ed-araya@wiu.edu
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Abstract

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In 2014 we conducted a survey for 6.7 GHz methanol masers with the Arecibo Telescope toward far infrared sources selected from the Hi-GAL catalog of massive cores. We found a number of sources with weak 6.7 GHz methanol masers, possibly indicating regions in early stages of star formation. Here we describe the results of follow-up observations that were conducted with the Very Large Array in New Mexico to characterize this new population of “weak” 6.7 GHz methanol masers.

Keywords

masersstars: formationISM: moleculesradio lines: ISM

References

Molinari, S., et al. (2010), PASP, 122, 314Google Scholar
Olmi, L., et al. (2014), A&A, 566, A18Google Scholar
Pandian, J. D. et al. (2007), ApJ, 656, 255Google Scholar