Computer Science
Scientific paper
Jun 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005sptz.prop20719b&link_type=abstract
Spitzer Proposal ID #20719
Computer Science
Scientific paper
Radio galaxies are among the largest and most powerful objects in the universe and, due to their interaction with their environment, are excellent objects to study the role of nuclear activity in galaxy evolution. However the interaction between radio-emitting active nuclei and their host galaxies on parsec scales is poorly understood. This is complicated by our lack of understanding of the relation between different classes of radio galaxy, defined by radio and optical properties. We propose to obtain IRS spectra of a sample of nearby radio galaxies in order to address fundamental questions about the nature of radio galaxies and their interaction with their environment. Low-resolution spectral maps of the central few kiloparsecs of these galaxies will enable us to probe the dusty central regions surrounding the active nucleus in these objects and to compare the classes of FRI and FRII radio galaxies. The IRS observations proposed here will be used along with archival IRAC and MIPS photometry to model the mid- to far-infrared spectral energy distributions (SEDs) of nearby radio galaxies. These SEDs will be compared with the IR SEDs of radio-quiet Seyfert galaxies, being obtained in a current Spitzer program, in order to understand how the interaction between an active nucleus and its host galaxy scales with host type, mass, and luminosity, black hole mass, and radio power.
Axon David
Baum Stefi
Buchanan Catherine
Floyd David
Gallimore Jack
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