Probing the Peak of the Dust SED of the z=3.9 Quasar APM 08279+5255

Details Probing the Peak of the Dust SED of the z=3.9 Quasar APM 08279+5255 Probing the Peak of the Dust SED of the z=3.9 Quasar APM 08279+5255

May 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007sptz.prop40597r&link_type=abstract

Spitzer Proposal ID #40597

Computer Science

Scientific paper

We propose to obtain a total of 111.1 seconds of 24, 70, and 160 μm MIPS photometry of the strongly lensed z=3.9 quasar APM 08279+5255, enough to detect the source in all three bands at high signal-to-noise. Our models show that the dust SED is composed of a cold starburst component and a warm AGN component, and it peaks around 100 μm. However, the peak itself is poorly constrained so far, and thus also the derived properties (masses, temperatures) of the subcomponents. Together with our existing high resolution observations of the dust and molecular gas, the proposed observations are imperative to further constrain the spectral properties of this unique high redshift source, and thus the processes powering its extreme bolometric luminosity. The unique lensing strength of this distant source allows to obtain the proposed observations very efficiently at an unparalleled high science-to-integration time ratio.

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