|Título||Survey of the ISM in early-type galaxies
Pastoriza, Miriani Griselda
Macchetto, Ferdinando Duccio
Bonatto, Charles Jose
Sparks, William B.
|Abstract||We present mid-IR photometric properties for a sample of 28 early-type galaxies observed at 6.75, 9.63 and 15 m with the ISOCAM instrument on board the ISO satellite. We nd total mid-IR luminosities in the range (3−42) x 108 Lʘ. The spectral energy distributions (SED) of the galaxies were derived using the mid-IR data together with previously published UV, optical and near-IR data. These SEDs clearly show a mid-IR emission coming from dust heated at T- ~ 260 K. Dust grains properties are inferred from the mid-IR colors. The masses of the hot dust component are in the range 10−400 Mʘ . The relationship between the masses derived from mid-IR observations and those derived from visual extinction are discussed. The possible common heating source for the gas and dust is investigated through the correlations between H and mid-IR luminosities.
|Contido em||Astronomy and astrophysics. Les Ulis. Vol. 389, no. 2 (July 2002), p. 355-366
Fontes de infravermelho
[en] Galaxies: elliptical and lenticular, cD
[en] ISM: general
|Tipo||Artigo de periódico
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