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Iras observations of Hα selected emission-line galaxies



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Rego Fernández, Manuel and Cordero Gracia, M. and Zamorano Calvo, Jaime and Gallego Maestro, Jesús (1993) Iras observations of Hα selected emission-line galaxies. Astronomical journal, 105 (2). pp. 427-436. ISSN 0004-6256

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Official URL: http://dx.doi.org/10.1086/116441


We present the results of IRAS observations of the UCM (Universidad Complutense de Madrid) sample of emission-line galaxies, which have been selected from wide-dispersion H_α objective-prism plates. These data are intended to provide a convenient summary of the relevant far-infrared (FIR) properties of these galaxies. Color-color diagrams, as interpreted by theoretical models, suggest that emission from UCM galaxies is mainly due to dust heated directly by photons emitted in active star-forming regions. Statistical analysis of some samples, including the IRAS minisurvey and blue-selected objective-prism samples, have been performed. Comparisons, based on FIR luminosity distributions, with the IRAS minisurvey make evident the lower metallicity of the UCM galaxies which cannot be considered as a parent population of IRAS-detected galaxies. The FIR luminosity distributions of different samples have been compared using nonparametric methods and the best correlation has been found for the UCM and Wasilewski samples. Finally, a more detailed analysis of a UCM subsample has been performed from a three component model in order to get information concerning the fractional contribution of disk, star formation activity, and nonthermal mechanisms operating in the UCM galaxies.

Item Type:Article
Additional Information:

© American Astronomical Society. We wish to thank the staff at Rutherford Appleton Lab­oratory for their friendly assistance and hospitality during the visit of J.G. in November 1991. This work was sup­ported in part by the Spanish "Programa Sectorial de Pro­moción General del Conocimiento" under Grant No. PB89-124.

Uncontrolled Keywords:Infrared observations; Starburst; Seyfert; Nuclei; Sample; Model
Subjects:Sciences > Physics > Astrophysics
Sciences > Physics > Astronomy
ID Code:34383
Deposited On:23 Nov 2015 14:47
Last Modified:10 Dec 2018 15:05

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