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Estimate of Electron Densities in HII Regions from Observations of Pairs of α-Type Recombination Radio Lines

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Radio Recombination Lines: 25 Years of Investigation

Part of the book series: Astrophysics and Space Science Library ((ASSL,volume 163))

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Abstract

A method of determining the electron density in ionized hydrogen regions from observations of pairs of excited hydrogen recombination α-type radio lines is presented.

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References

  • Brown R.L., Lockman F.J., and Knapp G.R. (1978) ‘Radio recombination lines’, Ann.Rev.Astr.Ap. 16, 445–485.

    Article  ADS  Google Scholar 

  • Dravskikh Z.V., and Parijskij Yu. N. (1981) ‘O recombinatsionnykh liniyakh vozbuzhdyonnogo vodoroda v kompaktnykh radio istochni-kakh, svyazannykh s galaktikami i kvazarami’, Astr.Zh. 58, vyp. 3, 486–489.

    ADS  Google Scholar 

  • Finn C. D. and Mugglestone D. (1965) ‘Tables of the line broadening function H(a, v)’, M.N.R.A.S. 129, 221–235.

    ADS  Google Scholar 

  • Lang K. (1978) Astrofizicheskie formuly, Mir, Moskva.

    Google Scholar 

  • Mezger P.G. and Henderson A.P. (1967) ‘Galactic HII regions. 1. Observations of their continuum radiation at the frequency 5 GHz’ Ap.J. 147, 471–489.

    Article  ADS  Google Scholar 

  • Salem M. and Brocklechurst M. (1979) ‘A table of departure coefficients from thermodynamic equilibrium (b factor) for hydrogenic ions’, Ap.J. Suppl. 39, 633–651.

    Article  ADS  Google Scholar 

  • Smirnov G.T., Sorochenko R.L., and Pankonin V. ‘Stark broadening in radio recombination lines towards the Orion nebula’, Astr.Ap. 135, 116–121.

    Google Scholar 

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Author information

Authors and Affiliations

  1. Leningrad Branch, Special Astrophysical Observatory of the USSR Academy of Sciences, 196140, Leningrad, Pulkovo, USSR

    A. F. Dravskikh & Z. V. Dravskikh

Authors
  1. A. F. Dravskikh
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  2. Z. V. Dravskikh
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Editor information

Editors and Affiliations

  1. National Radio Astronomy Observatory, Tucson, Arizona, USA

    M. A. Gordon

  2. P. N. Lebedev Physical Institute, U.S.S.R. Academic of Sciences, Moscow, USSR

    R. L. Sorochenko

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© 1990 Kluwer Academic Publishers

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Dravskikh, A.F., Dravskikh, Z.V. (1990). Estimate of Electron Densities in HII Regions from Observations of Pairs of α-Type Recombination Radio Lines. In: Gordon, M.A., Sorochenko, R.L. (eds) Radio Recombination Lines: 25 Years of Investigation. Astrophysics and Space Science Library, vol 163. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-0625-9_10

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  • DOI: https://doi.org/10.1007/978-94-009-0625-9_10

  • Publisher Name: Springer, Dordrecht

  • Print ISBN: 978-94-010-6768-3

  • Online ISBN: 978-94-009-0625-9

  • eBook Packages: Springer Book Archive

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