Other
Scientific paper
Jan 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009eimw.confe..65t&link_type=abstract
"The Evolving ISM in the Milky Way and Nearby Galaxies, The Fourth Spitzer Science Center Conference, Proceedings of the confere
Other
Galaxies: Elliptical And Lenticular, Galaxies: Cd, Galaxies: Ism, Infrared: Galaxies, Infrared: Ism, Ism: Dust, Ism: Extinction, Ism: Structure
Scientific paper
Far-infrared observations of elliptical galaxies show spatially extended, excess dust in several otherwise normal elliptical galaxies. The mass of extended dust exceeds that expected from our steady state models in which normal dusty mass loss from evolving red giant stars is balanced by grain destruction by sputtering. In at least one galaxy, NGC 5044, the extended excess dust is asymmetrically distributed in radial plumes previously known to contain enhanced X-ray and optical line emission. The astronomical implications of this unexpected excess dust are far-reaching and provide important new information about AGN feedback to the hot interstellar gas. These observations provide qualitatively new information about AGN-related energy released by central black holes and the buoyant transport of AGN-heated dusty gas in the hot gas atmospheres associated with massive elliptical galaxies.
Brighenti Fabrizio
Mathews William G.
Temi Pasquale
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