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Title: High-frequency carbon recombination line as a probe to study the environment of Ultra-compact HII regions
Authors: Roshi, Anish D.
Keywords: HII regions
ISM: magnetic fields
radio lines: ISM
stars: formation
Issue Date: 2007
Publisher: Cambridge University Press for the IAU
Citation: Triggered Star Formation in a Turbulent ISM, Edited by B. G. Elmegreen and J. Palous. Proceedings of the International Astronomical Union 2, IAU Symposium #237, held 14-18 August, 2006 in Prague, Czech Republic. Cambridge: Cambridge University Press, 2007., pp.469
Abstract: The far-ultra violet (6 – 13.6 eV) photons from the OB stars in Ultra-compact HII regions (UCHs) produce photo-dissociation regions (PDRs) at the interface between the ionized and the natal molecular material. In this paper, we show that carbon recombination lines (CRLs) at frequencies greater than a few GHz are detectable from these PDRs and such observations can be used to: (1) estimate the physical properties of the PDR material; (2) study the kinematics of the PDR material relative to the HII region gas; (3) constrain the magnetic fields in the vicinity of UCHs and (4) address the lifetime problem of UCHs.
Description: Restricted Access.
ISSN: E-ISSN: 1743-9221
P-ISSN: 1743-9213
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Copyright: 2007 International Astronomical Union
Appears in Collections:Research Papers (A&A)

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