RRLs: Tools for Astronomers

  • M.A. GordonEmail author
  • R.L. Sorochenko
Part of the Astrophysics and Space Science Library book series (ASSL, volume 282)


This chapter describes what astronomers have learned from observations of radio recombination lines since their detection. It discusses the characteristics of gaseous nebulae, the state of ionized hydrogen and helium in these nebulae, the characteristics of ionized carbon found in the comparatively cool interstellar gas, planetary nebulae, the Sun, an unusual early star (MWC 349A) emitting time‐varying masering lines, and nearby galaxies in which radio recombination lines have been detected.


Radial Velocity Molecular Cloud Galactic Center Galactic Plane Principal Quantum Number 
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Copyright information

© Springer Science+Business Media, LLC 2009

Authors and Affiliations

  1. 1.NARONational Radio Astronomy Observatory TucsonTucsonAZ 857521-0655
  2. 2.Russian Academy of SciencesP.N. Lebedev Physical InstituteMoskva

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