Published 1990
| public
Book Section - Chapter
The Radio-Infrared Correlation within Galaxies
- Creators
-
Helou, George
- Bicay, Michael D.
Chicago
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Abstract
A comparison of the distributions of 60μm infrared and 20cm radio continuum emission within spiral galaxies reveals a broad correlation between the two, which is modulated by a slow decrease in the 60μm-to-20cm ratio with increasing radius. Using these results, we propose a physical model for understanding the tight correlation between far-infrared and non-thermal radio luminosities in star-forming galaxies. This approach suggests that the basic constraint implied by the correlation is a tight coupling between the sources of the dust-heating photons and those of cosmic-ray electrons. Among spiral galaxies, we require in addition a universal relation whereby magnetic field strength scales with gas density to a power l/3 ≤ β ≤ 2/3.
Additional Information
© Kluwer Academic Publishers 1990. This research was supported through the IRAS Extended Mission Program by the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration. M.D.B. gratefully acknowledges the support of a National Research Council Research Associateship.Additional details
- Eprint ID
- 105924
- DOI
- 10.1007/978-94-009-0543-6_16
- Resolver ID
- CaltechAUTHORS:20201008-112317285
- NASA/JPL/Caltech
- National Research Council
- Created
-
2020-10-08Created from EPrint's datestamp field
- Updated
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2021-11-16Created from EPrint's last_modified field
- Caltech groups
- Infrared Processing and Analysis Center (IPAC)
- Series Name
- Astrophysics and Space Science Library
- Series Volume or Issue Number
- 160