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| Paper: |
A Herschel View on Galaxy/AGN Co-Evolution |
| Volume: |
446, Galaxy Evolution: Infrared to Millimeter Wavelength Perspective |
| Page: |
193 |
| Authors: |
Lutz, D.; PEP consortium |
| Abstract: |
Deep far-infrared photometric surveys studying galaxy evolution and the
nature of the cosmic infrared background are a key strength of the Herschel
mission. The PACS Evolutionary Probe (PEP) guaranteed time key program
obtains deep photometric surveys of some of the key extragalactic
multiwavelength fields at wavelengths between 70 and 160μm. This
contribution gives an overview of first science results,
illustrating the potential
of Herschel in providing calorimetric star formation rates for various
high redshift galaxy populations, thus testing and superseding previous
extrapolations from
other wavelengths, and enabling a wide range of galaxy evolution studies.
Herschel measured star formation rates of high redshift X-ray AGN suggest an
interplay between two paths of AGN/host coevolution. A correlation of
AGN luminosity and host star formation is traced locally over a wide
range of luminosities and also extends to luminous high-z AGN. This
correlation reflects an evolutionary connection, likely via merging. For
lower AGN luminosities, star formation is similar to that in non-active
massive galaxies and shows little dependence on AGN luminosity. The level
of this secular, non-merger driven star formation increasingly dominates
over the correlation at increasing redshift. |
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