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Masers in Starburst Galaxies

Published online by Cambridge University Press:  24 July 2012

Jeremy Darling
Jeremy Darling*
Affiliation:
Department of Astrophysical and Planetary SciencesUniversity of ColoradoBoulder, CO 80309, United States of America email: jdarling@colorado.edu
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Abstract

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Masers in starburst galaxies are outstanding probes of a range of phenomena related to galaxy and black hole evolution, star formation, and magnetic fields. Here I briefly discuss five related topics: (1) Galactic analog water masers in nearby galaxies; (2) multiwavelength solutions to the OH megamaser puzzle in major galaxy mergers; (3) formaldehyde anti-inversion in starburst galaxies; (4) OH spoofing in HI surveys; and (5) new discovery space in radio line surveys. New insights into the physical conditions responsible for OH megamasers, including indications of a critical molecular gas density obtained from the formaldehyde “densitometer,” will be applicable to future surveys, particularly surveys for redshifted hydrogen where OH lines arising in major galaxy mergers can “contaminate” the disk population identified by the HI 21 cm line. Blind radio spectral line surveys also offer the opportunity for unexpected discoveries of new nonthermal radio lines.

Keywords

masersradiation mechanisms: nonthermalradiative transfersurveysgalaxies: evolutiongalaxies: interactionsgalaxies: ISMgalaxies: starburstinfrared: galaxiesradio lines: galaxies
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 8 , Symposium S287: Cosmic Masers - from OH to H0 , January 2012 , pp. 333 - 339
Copyright
Copyright © International Astronomical Union 2012

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