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Far-infrared emission and star formation in spiral galaxiesThe correlations between the emission in the far-IR, H-alpha, and blue in a sample of normal spiral galaxies are investigated. It is found that the luminosities in these three bands are all tightly correlated, although both the strength of the correlations and their functional dependencies are a function of the galaxies' morphological types. The best-fit power laws to these correlations are different for the comparison of different quantities and deviate significantly from linearity in some cases, implying the presence of additional emission mechanisms not related to the general increase of luminosity with galactic mass. Clear evidence is found of two independent effects in the incidence of warm far-IR emission in late-type spirals. One is a luminosity effect shown by the presence of excess far-IR relative to H-alpha or optical emission in the more luminous galaxies. The other is a dependence on widespread star-formation activity.
Document ID
19890058293
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Trinchieri, G.
(Arcetri, Osservatorio Astrofisico, Florence, Italy; Harvard-Smithsonian Center for Astrophysics, Cambridge MA, United States)
Fabbiano, G.
(Harvard-Smithsonian Center for Astrophysics Cambridge, MA, United States)
Bandiera, R.
(Arcetri Osservatorio Astrofisico, Florence, Italy)
Date Acquired
August 14, 2013
Publication Date
July 15, 1989
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 342
ISSN: 0004-637X
Subject Category
Astrophysics
Accession Number
89A45664
Funding Number(s)
CONTRACT_GRANT: NAS8-30751
CONTRACT_GRANT: JPL-958021
Distribution Limits
Public
Copyright
Other

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