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Title: Radio recombination lines from starburts: NGC 3256, NGC 4945 and the circinus galaxy
Authors: Roy, A.L.
Goss, W.M.
Mohan, Niruj R.
Oosterloo, T.A.
Anantharamaiah, K.R.
Keywords: galaxies
H II regions
Starburst galaxies
infrared excess galaxies
emission and reflection nebulae
Issue Date: Aug-2005
Publisher: Scientific and Technical Information for NASA
Citation: AIP Conference Proceedings, 2005, Vol.783, p303
Abstract: A renewed attempt to detect radio recombination lines from external galaxies has resulted in the measurement of lines from several bright starburst galaxies. The lines are produced by hydrogen ionized by young, high-mass stars and are diagnostic of the conditions and gas dynamics in the starburst regions without problems of dust obscuration. We present here detections of the lines H91α and H92α near 8.6 GHz from the starburst nuclei in NGC 3256, NGC 4945, and the Circinus galaxy using the ATCA and VLA. Modelling the line emitting region as a collection of H II regions, we derive the required number of H II regions, their temperature, density, and distribution.
Description: Restricted Access. An open-access version is available at (one of the alternative locations)
Alternative Location: 10.1063/1.2034998
Copyright: 2005, Scientific and Technical Information
Appears in Collections:Research Papers (A&A)

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