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The Radio-Infrared Correlation within Galaxies

Helou, George and Bicay, Michael D. (1990) The Radio-Infrared Correlation within Galaxies. In: Windows on Galaxies. Astrophysics and Space Science Library. No.160. Springer Netherlands , Dordrecht, pp. 115-119. ISBN 9789401067317.

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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.

Item Type:Book Section
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URLURL TypeDescription ReadCube access
Helou, George0000-0003-3367-3415
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.
Group:Infrared Processing and Analysis Center (IPAC)
Funding AgencyGrant Number
National Research CouncilUNSPECIFIED
Subject Keywords:Star Formation; Spiral Galaxy; Tight Coupling; Disk Galaxy; Star Formation Activity
Series Name:Astrophysics and Space Science Library
Issue or Number:160
Record Number:CaltechAUTHORS:20201008-112317285
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:105924
Deposited By: George Porter
Deposited On:08 Oct 2020 20:43
Last Modified:16 Nov 2021 18:47

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