Friday, 5 September 2008

DOG fight

from Pope et al., arXiv:0808.2816. Dust-obscured galaxies (DOGs)
have been recently defined as objects with extremely red R-[24um]
colors. Another recent paper by Fiore et al. studied the X-ray
properties of a similarly-selected set of galaxies and found that
they are consistent with being Compton-thick AGN. The DOG people
claimed that these things were primarily starbursts, and so they
launch a counteroffensive with the above figure. While most bright
DOGs show a strong 8um excess (and are therefore likely powered by
AGN), most of the overall sample seems to be dominated by star formation.

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