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

被引:67
作者
Gallagher, S. C. [1 ]
Hines, D. C.
Blaylock, Myra
Priddey, R. S.
Brandt, W. N.
Egami, E. E.
机构
[1] Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA
[2] Space Sci Inst, Boulder, CO 80301 USA
[3] Univ Arizona, Steward Observ, Tucson, AZ 85721 USA
[4] Univ Hertfordshire, Ctr Astrophys Res, Hatfield AL10 9AB, Herts, England
[5] Penn State Univ, Dept Astron & Astrophys, University Pk, PA 16802 USA
关键词
galaxies : active; quasars : absorption lines;
D O I
10.1086/519438
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
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 mu m) 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 L-FIR,L- SF = 10(13)-10(14) L-circle dot. 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.
引用
收藏
页码:157 / 173
页数:17
相关论文
共 61 条
[21]   The frequency and radio properties of broad absorption line quasars [J].
Hewett, PC ;
Foltz, CB .
ASTRONOMICAL JOURNAL, 2003, 125 (04) :1784-1794
[22]   THE LARGE BRIGHT QUASAR SURVEY .6. QUASAR CATALOG AND SURVEY PARAMETERS [J].
HEWETT, PC ;
FOLTZ, CB ;
CHAFFEE, FH .
ASTRONOMICAL JOURNAL, 1995, 109 (04) :1498-1521
[23]   The large bright quasar survey. VII. The LBQS and first surveys [J].
Hewett, PC ;
Foltz, CB ;
Chaffee, FH .
ASTRONOMICAL JOURNAL, 2001, 122 (02) :518-535
[24]   A physical model for the origin of quasar lifetimes [J].
Hopkins, PF ;
Hernquist, L ;
Martini, P ;
Cox, TJ ;
Robertson, B ;
Di Matteo, T ;
Springel, V .
ASTROPHYSICAL JOURNAL, 2005, 625 (02) :L71-L74
[25]   DOUBLE TROUGHS IN BROAD ABSORPTION-LINE QUASARS AND LY-ALPHA-N-V LINE-LOCKING [J].
KORISTA, KT ;
VOIT, GM ;
MORRIS, SL ;
WEYMANN, RJ .
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, 1993, 88 (02) :357-381
[26]   What is the true covering factor of absorbing matter in BALQSOs? [J].
Krolik, JH ;
Voit, GM .
ASTROPHYSICAL JOURNAL, 1998, 497 (01) :L5-L8
[27]   Polarization properties of broad absorption line QSOs:: New statistical clues [J].
Lamy, H ;
Hutsemékers, D .
ASTRONOMY & ASTROPHYSICS, 2004, 427 (01) :107-123
[28]  
LAVALLEY M, 1992, ASTR SOC P, V25, P245
[29]   Submillimeter observations of a sample of broad absorption line quasars [J].
Lewis, GF ;
Chapman, SC ;
Kuncic, Z .
ASTROPHYSICAL JOURNAL, 2003, 596 (01) :L35-L38
[30]   INFRARED COLOR-SELECTED QUASARS AND SEYFERT-1 GALAXIES [J].
LOW, FJ ;
HUCHRA, JP ;
KLEINMANN, SG ;
CUTRI, RM .
ASTROPHYSICAL JOURNAL, 1988, 327 (02) :L41-L45