Frying Doughnuts: What can the reprocessing of X-rays to IR tell us about the AGN environment?

Details Frying Doughnuts: What can the reprocessing of X-rays to IR tell us about the AGN environment? Frying Doughnuts: What can the reprocessing of X-rays to IR tell us about the AGN environment?

2008-12-04

arxiv.org/abs/0812.0984v1

Astronomy and Astrophysics

Astrophysics

12 pages, MNRAS accepted

Scientific paper

10.1111/j.1365-2966.2008.14323.x

Active galactic nuclei (AGN) produce vast amounts of high energy radiation deep in their central engines. X-rays either escape the AGN or are absorbed and re-emitted mostly as IR. By studying the dispersion in the ratio of observed mid-IR luminosity to observed 2-10keV X-ray luminosity (R_{ir/x}) in AGN we can investigate the reprocessing material (possibly a torus or donut of dust) in the AGN central engine, independent of model assumptions. We studied the ratio of observed mid-IR and 2-10keV X-ray luminosities in a heterogeneous sample of 245 AGN from the literature. We found that when we removed AGN with prominent jets, ~90% of Type I AGN lay within a very tight dispersion in luminosity ratio (1

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