Abstract
Radio recombination lines (RRL) of carbon towards Cas A has now been observed over the range of frequencies 16.7 – 225 MHz. The obtained results allow to deduce ISM parameters in Perseus arm where the lines originate. Satisfactory agreement with the entire observation data is achieved by two models: the “hot” one with Te=50 K and Ne=0. 15 cm-3 and the “cold” one with Te=18 K and Ne=0.3 cm-3. The negative result in attempts to detect hydrogen RRLs with presence of carbon lines make it possible to define the upper limit of hydrogen ionization rate.
Keywords
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
Anantharamaiah, K.R., Erickson, W.C., and Radhakrishnan, V. 1985, Nature, 315, 647.
Anantharamaiah, K.R., Payne, H.E., and Erickson, W. C. 1988, M.N.R.A.S., 235, 151.
Blake, D.H., Crutcher, R.M., and Watson, W.D. 1980, Nature, 287, 707.
Brown, D.H. 1980, in Radio Recombination Lines, Ed. P.A. Shaver, Reidel. Publ. Comp., p.127.
Casse, J.L., and Shaver, P.A. 1977, Astr. Ap., 61, 805.
Ershov, A.A., Lekht, E.E., Rudnitskii, C.M., and Sorochenko, R.L. 1982, Sov. Astr. Lett., 8, 374.
Ershov, A.A., Ilyasov, Yu.P., Lekht, E.E., Smirnov, G.T., Solodkov V.T., and Sorochenko, R.L. 1984, Sov. Astr. Lett., 10, 348.
Ershov, A.A., Lekht, E.E., Smirnov, G.T., and Sorochenko, R.L. 1987, Sov. Astr. Lett., 13, 8.
Federman, S.R., Glassgold, A. E., and Kwan, A.E. 1979, Ap. J., 277, 446.
Goss, W.M., Kalberla, P. M. W., and Dickel, H. R. 1984, Astr. Ap., 139, 317.
Heiles, C., and Stevens, M. 1986, Ap.J., 301, 331.
Konovalenko, A.A., and Sodin, L.G. 1979, Sov. Astr. Lett., 5, 663.
Konovalenko, A.A., and Sodin, L.G. 1980, Nature, 283, 360.
Konovalenko, A.A., and Sodin, L.G. 1981, Nature, 294, 135.
Konovalenko, A.A. 1984, Sov. Astr. Lett., 10, 353.
Lekht, E.E., Smirnov, G.T., and Sorochenko, R.L. 1989, Sov. Astr. Lett., 15, 396.
Lekht, E.E., Smirnov, G.T., and Sorochenko, R.L. 1990, Sov. Astr. Lett., to be published.
Mebold, U., and Hills, D.L. 1975, Astr. Ap., 42, 187.
Payne, H.E., Anantharamaiah, K. R., and Erickson, W.C. 1989, Ap. J., 341, 890.
Shaver, P.A. 1975, Pramana, 5, 1.
Shaver, P.A., Pedlar, A., and Davies, R. D. 1976, M.N.R.A.S., 177, 45.
Sorochenko, R.L., and Smirnov, G.T. 1987, Sov. Astr. Lett., 13, 77.
Spitzer, L. 1978, Physical Processes in the Interstellar Medium, New York: J.Wiley.
Ungerechts, H., and Walmsley, CM. 1978, Techn. Bericht. N45, Max-Planck Institut fur Radioastronomie, Bonn.
Troland, T.H., Crutcher, R. M., and Heiles, CE. 1985, Ap. J., 298, 808.
Viala, Y. P., and Walmsley, C.M. 1976, Astr. Ap., 50, 1.
Walmsley, CM., and Watson, W. D. 1982a, Ap. J., 260, 317.
Walmsley, CM., and Watson, W. D. 1982b, Ap. J. Lett., 255, L123.
Watson, W.D., Western, L.R., and Christensen, R.B. 1980, Ap. J., 240, 956.
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 1990 Kluwer Academic Publishers
About this chapter
Cite this chapter
Sorochenko, R.L., Smirnov, G.T. (1990). Low Frequency Radio Recombination Lines Towards Cas A. 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_18
Download citation
DOI: https://doi.org/10.1007/978-94-009-0625-9_18
Publisher Name: Springer, Dordrecht
Print ISBN: 978-94-010-6768-3
Online ISBN: 978-94-009-0625-9
eBook Packages: Springer Book Archive