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Date and Time of the Query: 2019-06-17 T22:46:33 PDT
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For refcode 1988A&A...204...28V:
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Copyright by European Southern Observatory (ESO). Reproduced by permission
1988A&A...204...28V Dust in early-type galaxies M.-P. Veron-Cetty and P. Veron Observatoire de Haute Provence (CNRS), F-04870 Saint Michel l'Observatoire, France Received January 4, accepted April 18, 1988 Summary. We have looked for dust in a complete sample of 78 early-type galaxies by comparison of blue and near-infrared CCD frames. Eighteen galaxies (23%) from this sample are now known to contain dust at the level of 10^4^ M_sun_. There is no evidence that radio galaxies contain dust more often that radio-quiet galaxies. On the other hand, most galaxies with dust are detected at 100 micron by IRAS, the infrared emission being the thermal emission of the cold dust seen on the direct images. Two galaxies detected by IRAS and showing no dust are "active" galaxies: NGC 4486 with its well known jet and NGC 7213, a Seyfert 1 galaxy; in these cases, the infrared emission could be related to this activity rather than due to dust. Key words: galaxies: elliptical - infrared radiation - interstellar medium dust
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