Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...20919204r&link_type=abstract
2007 AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, #192.04; Bulletin of the American Astronomical Society,
Astronomy and Astrophysics
Astronomy
Scientific paper
We derive the properties of dust and gas in the Large Magellanic Cloud using observations with the Spitzer Space Telescope in 7 broad filters from 3.6-160 μm. Two regions with different types of interstellar gas (atomic and molecular) were investigated first. In the atomic-gas-dominated region, the dust-to-gas ratio was measured using the optical depth at 160 μm per unit HI column density (from the ATCA 21-cm survey). The resulting dust-to-gas is lower than observed using similar techniques for dust in the solar neighborhood, and very similar to that derived for the average LMC extinction. In the molecular region, the dust is somewhat colder, and there is more emission per unit HI column density. This excess infrared emission is attributed to dust in the molecular cloud, for which we constrain the combination of dust abundance and H2 column density per unit CO line brightness (from the NANTEN survey). Finally, we compare the integrated emission from the LMC to that derived for the individual regions.
Bernard JP.
Fukui Yasuo
Kawamura Akiko
Meixner Matthew
Paradis Deborah
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