Spitzer Observations of an Intensely Star Forming Quasar Host Galaxy

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The relation between starburst and AGN is an important topic in understanding galaxy formation and evolution. It has been shown that most spheroidal galaxies harbour an AGN, and that the mass of the black hole correlates with the velocity distribution of the stellar population, suggestive of a coeval formation. Here we propose to exploit the high sensitivity of MIPS to do mid- and far-infrared photometry of an unusual z=2.84 quasar. The quasar host galaxy is undergoing intense star formation (as witnessed through bright submm and CO detections), and is possibly one of the most massive starbursts observed in a high redshift quasar so far. The mid- and far-IR photometry will allow us to constrain the SED, and thereby both accurately determine the IR luminosity, separate the cold and the host dust components, and to determine the evolutionary stage. The MIPS data will be supplemented with IRAC data from another already approved program.

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