Abstract
view Abstract Citations (84) References (27) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS The Enhancement of Infrared Emission in Interacting Galaxies Telesco, C. M. ; Wolstencroft, R. D. ; Done, C. Abstract We present a study of selected infrared properties, based on IRAS observations, of interacting pairs of galaxies from the Arp-Madore Catalogue of Southern Peculiar Galaxies and Associations. These pairs were detected by IRAS at both 60 and 100 microns. For pairs of comparably sized galaxies we find that a strong tendency exists for the dust color temperature and the interaction strength to be highest for pairs with the smallest separation. This conclusion implies that galaxy interactions significantly enhance the intensity or the efficiency of star formation. No trend between color temperature and separation is evident for galaxies with smaller companions. There are 10 times as many pairs in our sample that contain one IRAS far-infrared galaxy as there are pairs for which both galaxies were detected by IRAS, thus strengthening previous conclusions that the effect of a perturbation depends strongly on the detailed geometry of the interaction. For pairs with a large and a small galaxy, it is always the large galaxy that is detected by IRAS at 60 and 100 microns. Assuming that the galaxy diameters are a measure of their relative distances, we find that the galaxy pairs with higher dust temperatures are more distant than those with colder dust; this effect results partially from the more stringent 60 micron detection limit but, most importantly, from the higher luminosities of the hotter pairs. Finally, at least 10% of the pairs of comparably sized interacting galaxies with primary diameters between 10" and 100" are detected by IRAS at 60 and 100 microns. This result suggests that interactions can efficiently lead to enhanced infrared emission. Publication: The Astrophysical Journal Pub Date: June 1988 DOI: 10.1086/166368 Bibcode: 1988ApJ...329..174T Keywords: Cosmic Dust; Far Infrared Radiation; Infrared Sources (Astronomy); Interacting Galaxies; Star Formation Rate; Infrared Astronomy Satellite; Peculiar Galaxies; Perturbation Theory; Sky Surveys (Astronomy); Astrophysics; GALAXIES: INTERACTIONS; GALAXIES: PHOTOMETRY; INFRARED: SOURCES full text sources ADS | data products SIMBAD (195) NED (189)
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