Hostname: page-component-745bb68f8f-hvd4g Total loading time: 0 Render date: 2025-02-03T06:16:19.552Z Has data issue: false hasContentIssue false
  • English
  • Français

On Microwave Recombination Lines from Hi Regions

Published online by Cambridge University Press:  14 August 2015

B. Zuckerman  and
John A. Ball
B. Zuckerman
Affiliation:
University of Maryland, College Park, Md., U.S.A., and University of California, Berkeley, Calif., U.S.A.
John A. Ball
Affiliation:
Center for Astrophysics, Harvard College Observatory and Smithsonian Astrophysical Observatory, Cambridge, Mass., U.S.A.

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

There has been considerable uncertainty in the nature of the regions from which carbon and narrow hydrogen lines have been observed. Specifically there are two different models. In model I the lines originate in low-density Hiregions that are basically atomic, and stimulated emission enhances the line intensity by an order of magnitude. In model II the lines originate in the outer layers of very dense molecular regions and are due primarily to spontaneous emission. The first model is generally accepted and used by the astronomical community. However, we believe that the second is correct.

Type
Part 1: The Interstellar Medium
Information
Symposium - International Astronomical Union , Volume 60: Galactic Radio Astronomy , 1974 , pp. 79 - 80
Copyright
Copyright © Reidel 1974