SIMBAD references

2002A&A...389..355F - Astronomy and Astrophysics, volume 389, 355-366 (2002/7-2)

Survey of the ISM in early-type galaxies. IV. The hot dust component.

FERRARI F., PASTORIZA M.G., MACCHETTO F.D., BONATTO C., PANAGIA N. and SPARKS W.B.

Abstract (from CDS):

We present mid-IR photometric properties for a sample of 28 early-type galaxies observed at 6.75, 9.63 and 15 µ m with the ISOCAM instrument on board the ISO satellite. We find total mid-IR luminosities in the range (3-42)x108L. 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≃260K. Dust grains properties are inferred from the mid-IR colors. The masses of the hot dust component are in the range 10-400M. 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 Hα and mid-IR luminosities.

Abstract Copyright:

Journal keyword(s): galaxies: elliptical and lenticular, cD - ISM: general

Simbad objects: 31

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2020.10.27-14:31:03

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