NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-06-17 T18:35:58 PDT
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For refcode 1999A&AS..136..269F:
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Copyright by European Southern Observatory (ESO). Reproduced by permission
1999A&AS..136..269F A survey of the ISM in early-type galaxies. II. The dust. FERRARI F., PASTORIZA M.G., MACCHETTO F., CAON N. Received May 11, 1998;Accepted January 4, 1999 Abstract: We present results of a CCD optical imaging survey of the dust content in 22 early-type luminous galaxies, selected from the RC3 Catalog. A large fraction (75%) of the observed galaxies show significant amounts of dust. The morphology and size of the dust distribution of the observed galaxies follows very closely that of the ionized gas. For each galaxy, we have used broad band V and R filters imaging to build colour maps and determine the A_V_ and A_R_ extinction maps. We have found typical A_V_ values of 0.026 and A_R_ of 0.023 and have derived (V-R) values in the range 0.49-0.68. The A_V_ values together with an assumption of the dust grain size and composition enable us to estimate the dust masses. We have studied the correlations between the mass of dust and the H{alpha}, IR and L_B_ luminosities. Finally, we investigate the possible mechanisms responsible for the dust emission. Key words: galaxies: elliptical and lenticular - galaxies: ISM - dust extinction - surveys
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