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http://hdl.handle.net/2289/1080
Title: | Low density ionized gas in the inner Galaxy - interpretation of recombination line observations at 325 MHz. |
Authors: | Anantharamaiah, K.R. |
Keywords: | Galaxy Recombinational lines Galactic rige Interstellar medium Electron densities H2 regions Low density envelopes |
Issue Date: | 1985 |
Publisher: | Indian Academy of Sciences, Bangalore, India. |
Citation: | Journal of Astrophysics and Astronomy, 1985, Vol. 6, p203-226. |
Abstract: | The properties of diffuse ionized gas in the inner Galaxy are derived from a recent survey of the H 272-alpha recombination line (324.99 MHz) in the direction of 34 H II regions, 12 SNRs, and six regions of continuum minimum in the Galactic plane. The derived properties of the gas are an electron density of 0.5-6/cu cm, an electron temperature of 3000-8000 K, and emission measures of 500-3000 pc/cm exp 6. It is suggested that the low-frequency recombination lines arise in low-density envelopes of the H II regions; it is found that these envelopes should have electron densities in the range 1-10/cu cm and linear sizes of 30-300 pc in order to produce the observed H 272-alpha lines. |
URI: | http://hdl.handle.net/2289/1080 |
ISSN: | 0250-6335 |
Copyright: | Indian Academy of Sciences, Bangalore, India. |
Appears in Collections: | Research Papers (A&A) |
Files in This Item:
File | Description | Size | Format | |
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1985_JAA_V6_p203-226.pdf | 24p. | 1.11 MB | Adobe PDF | View/Open |
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