SIMBAD references

2007ApJ...665..157G - Astrophys. J., 665, 157-173 (2007/August-2)

Radio through X-ray spectral energy distributions of 38 broad absorption line quasars.

GALLAGHER S.C., HINES D.C., BLAYLOCK M., PRIDDEY R.S., BRANDT W.N. and EGAMI E.E.

Abstract (from CDS):

We have compiled the largest sample of multiwavelength spectral energy distributions (SEDs) of broad absorption line (BAL) quasars to date, from the radio to the X-ray. We present new Spitzer MIPS (24, 70, and 160 µm) observations of 38 BAL quasars in addition to data from the literature and public archives. In general, the mid-infrared properties of BAL quasars are consistent with those of non-BAL quasars of comparable luminosity. In particular, the optical to mid-infrared luminosity ratios of the two populations are indistinguishable. We also measure or place upper limits on the contribution of star formation to the far-infrared power. Of 22 (57%) upper limits, seven quasars have sufficiently sensitive constraints to conclude that star formation likely contributes little (<20%) to their far-infrared power. The 17 BAL quasars (45%) with detected excess far-infrared emission likely host hyperluminous starbursts with LFIR,SF=1013-1014 L☉. Mid-infrared through X-ray composite BAL quasar SEDs are presented, incorporating all of the available photometry. Overall, we find no compelling evidence for inherent differences between the SEDs of BAL versus non-BAL quasars of comparable luminosity. Therefore a ``cocoon'' picture of a typical BAL quasar outflow whereby the wind covers a large fraction of the sky is not supported by the mid-infrared SED comparison with normal quasars, and the disk-wind paradigm with a typical radio-quiet quasar hosting a BAL region remains viable.

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Journal keyword(s): Galaxies: Active - Galaxies: Quasars: Absorption Lines

Simbad objects: 39

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