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Early results from a diagnostic 1.3 cm survey of massive young protostars

Published online by Cambridge University Press:  24 July 2012

Crystal L. Brogan ,
Todd R. Hunter ,
Claudia J. Cyganowski ,
Remy Indebetouw ,
Rachel Friesen  and
Claire Chandler
Crystal L. Brogan
Affiliation:
National Radio Astronomy Observatory (NRAO), 520 Edgemont Rd, Charlottesville, VA 22903, USA email: cbrogan@nrao.edu
Todd R. Hunter
Affiliation:
National Radio Astronomy Observatory (NRAO), 520 Edgemont Rd, Charlottesville, VA 22903, USA email: cbrogan@nrao.edu
Claudia J. Cyganowski
Affiliation:
Harvard-Smithsonian Center for Astrophysics, 60 Garden St., Cambridge, MA 02138, USA
Remy Indebetouw
Affiliation:
National Radio Astronomy Observatory (NRAO), 520 Edgemont Rd, Charlottesville, VA 22903, USA email: cbrogan@nrao.edu University of Virginia, Charlottesville, VA 22903, USA
Rachel Friesen
Affiliation:
National Radio Astronomy Observatory (NRAO), 520 Edgemont Rd, Charlottesville, VA 22903, USA email: cbrogan@nrao.edu
Claire Chandler
Affiliation:
National Radio Astronomy Observatory (NRAO), Socorro, New Mexico, 87801, 8USA
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Abstract

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We have used the recently-upgraded Karl G. Jansky Very Large Array (JVLA) to conduct a K-band (~24 GHz) study of 22 massive young stellar objects in 1.3 cm continuum and a comprehensive set of diagnostic lines. This survey is unique in that it samples a wide range of massive star formation signposts simultaneously for the first time. In this proceeding we present preliminary results for the 11 sources in the 2-4 kpc distance bin. We detect compact NH3 cores in all of the fields, with many showing emission up through the (6,6) transition. Maser emission in the 25 GHz CH3OH ladder is present in 7 of 11 sources. We also detect non-thermal emission in the NH3 (3,3) transition in 7 of 11 sources.

Keywords

masersstars: formationISM: jets and outflowsISM: moleculesradio lines: ISMradio continuum: ISMinfrared: ISMsubmillimeter
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 8 , Symposium S287: Cosmic Masers - from OH to H0 , January 2012 , pp. 497 - 501
Copyright
Copyright © International Astronomical Union 2012

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