Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003esasp.511..231o&link_type=abstract
Exploiting the ISO Data Archive. Infrared Astronomy in the Internet Age, held in Siguenza, Spain 24-27 June, 2002. Edited by
Astronomy and Astrophysics
Astronomy
3
Scientific paper
The infrared spectral energy distribution (IR SED; 12-155 μm) of nearby galaxies has been investigated in terms of the IR SED of our Galaxy by using the IRTS/FILM and ISO/LWS 155 μm data in addition to the IRAS data. The 12 μm emission is shown to be well correlated with the far-infrared emission both in the Galaxy and galaxies. The 12 μm emission in galaxies can be accounted for fairly well by the superposition of the empirical emissivity derived from the observations of the Galactic plane or the dust model that includes PAHs and thermally fluctuating very small grains. However, the current dust model does not account for the characteristics of the 25-60 μm emission relative to the far-infrared in the Galaxy and galaxies consistently. The empirically derived IR SED from the observations of the Galaxy does not account for the IR SED of the sample galaxies either and the 25-60 μm emission is suggested to constitute a different component from the far-infrared emission.
Mochizuki Haruko
Onaka Takashi
Shibai Hiroshi
Takagi Takagi
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