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Astron. Astrophys. 315, L75-78 (1996)

ISO observations of hot dust in the nucleusof the S0 galaxy NGC 3998*

G.R. Knapp1, M.P. Rupen2, M. Fich3, D.A. Harper4, and C.G. Wynn-Williams5

1 Department of Astrophysical Sciences, Princeton University, Princeton, NJ 08544, USA
2 National Radio Astronomy Observatory, P.O. Box 0, Socorro, NM 87801, USA
3 Department of Physics, University of Waterloo, Waterloo, ON N2L 3G1, Canada
4 Yerkes Observatory, Williams Bay, WI 53191, USA
5 Institute for Astronomy, University of Hawaii, 2680 Woodlawn Drive, Honolulu, HI 96822, USA

Received 1 July 1996 / Accepted 13 September 1996

Abstract. ISOCAM maps of the Seyfert 1 S0 galaxy NGC 3998 between img1.gif and img2.gif detect both extended emission from the bulge stars and strong point source emission from the nucleus. The inner regions of NGC 3998 appear to contain a few thousand solar masses of warm ( img3.gif K) dust, probably associated with the AGN.

Key words: galaxies: elliptical and lenticular, cD - galaxies: individual: NGC 3998 - galaxies: ISM - galaxies: Seyfert

* ISO is an ESA project with instruments funded by ESA Member States (especially the PI countries: France, Germany, the Netherlands and the United Kingdon) and with the participation of ISAS and NASA

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Last change: December 16, 1996
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