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Low Frequency Radio Recombination Lines Towards Cas A

  • R. L. Sorochenko
  • G. T. Smirnov
Part of the Astrophysics and Space Science Library book series (ASSL, volume 163)

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

Optical Depth Molecular Cloud Dielectronic Recombination Hydrogen Line Carbon Line 
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.

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Copyright information

© Kluwer Academic Publishers 1990

Authors and Affiliations

  • R. L. Sorochenko
    • 1
  • G. T. Smirnov
    • 1
  1. 1.P.N. Lebedev Physical InstituteUSSR Academy of SciencesMoscowUSSR

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