2009ApJ...702..911M


Query : 2009ApJ...702..911M

2009ApJ...702..911M - Astrophys. J., 702, 911-928 (2009/September-2)

A Chandra survey of the X-ray properties of broad absorption line radio-loud quasars.

MILLER B.P., BRANDT W.N., GIBSON R.R., GARMIRE G.P. and SHEMMER O.

Abstract (from CDS):

This work presents the results of a Chandra study of 21 broad absorption line (BAL) radio-loud quasars (RLQs). We conducted a Chandra snapshot survey of 12 bright BAL RLQs selected from Sloan Digital Sky Survey Data/Faint Images of the Radio Sky data and possessing a wide range of radio and C IV absorption properties. Optical spectra were obtained nearly contemporaneously with the Hobby-Eberly Telescope; no strong flux or BAL variability was seen between epochs. In addition to the snapshot targets, we include in our sample nine additional BAL RLQs possessing archival Chandra coverage. We compare the properties of (predominantly high-ionization) BAL RLQs to those of non-BAL RLQs as well as to BAL radio-quiet quasars (RQQs) and non-BAL RQQs for context. All 12 snapshots and 8/9 archival BAL RLQs are detected, with observed X-ray luminosities less than those of non-BAL RLQs having comparable optical/UV luminosities by typical factors of 4.1-8.5. (BAL RLQs are also X-ray weak by typical factors of 2.0-4.5 relative to non-BAL RLQs having both comparable optical/UV and radio luminosities.) However, BAL RLQs are not as X-ray weak relative to non-BAL RLQs as are BAL RQQs relative to non-BAL RQQs. While some BAL RLQs have harder X-ray spectra than typical non-BAL RLQs, some have hardness ratios consistent with those of non-BAL RLQs, and there does not appear to be a correlation between X-ray weakness and spectral hardness, in contrast to the situation for BAL RQQs. RLQs are expected to have X-ray continuum contributions from both accretion-disk corona and small-scale jet emission. While the entire X-ray continuum in BAL RLQs cannot be obscured to the same degree as in BAL RQQs, we calculate that the jet is likely partially covered in many BAL RLQs. We comment briefly on implications for geometries and source ages in BAL RLQs.

Abstract Copyright:

Journal keyword(s): galaxies: active - galaxies: jets - quasars: absorption lines

Simbad objects: 27

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Number of rows : 27
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 QSO J0200-0845 QSO 02 00 22.0186455120 -08 45 12.118255020   19.46 19.12     ~ 35 0
2 QSO J0256-0119 QSO 02 56 25.6304170032 -01 19 11.617038012   18.9 17.99     ~ 22 0
3 [VV2006] J074610.5+230710 QSO 07 46 10.5136064472 +23 07 10.799403456   20.17 19.54     ~ 22 0
4 QSO J0811+5007 QSO 08 11 02.9131306536 +50 07 24.303496044   19.65 19.39     ~ 46 0
5 [VV2006] J081426.5+364713 QSO 08 14 26.4503661192 +36 47 13.492189032   21.47 20.89     ~ 27 0
6 [VV2006] J083749.6+364145 QSO 08 37 49.5974221464 +36 41 45.580883352   20.48 19.65 18.65   ~ 30 0
7 [VV2006] J085641.5+424254 QSO 08 56 41.5652334432 +42 42 53.989227396   19.47 19.07     ~ 34 0
8 [VV2006] J091951.3+005854 QSO 09 19 51.2989867296 +00 58 54.986319624   20.12 19.84     ~ 24 0
9 7C 092608.30+381054.00 QSO 09 29 13.9701555072 +37 57 42.943460580   18.72 18.48     ~ 42 1
10 QSO J1004+1229 QSO 10 04 24.8871 +12 29 22.245   24.83 23.23 20.80   ~ 51 1
11 4C 13.41 Sy1 10 07 26.0965408440 +12 48 56.184940764   15.81 15.68     ~ 394 2
12 6C 101301+522412 QSO 10 16 14.2585878552 +52 09 15.452408628     20.20     ~ 31 1
13 [VV2006] J102258.4+123429 QSO 10 22 58.4135294280 +12 34 29.708555412   19.31 18.88     ~ 23 2
14 7C 104545.79+351316.00 QSO 10 48 34.2449674944 +34 57 24.874781184           ~ 51 1
15 [VV2006] J105416.5+512326 QSO 10 54 16.5126907152 +51 23 26.051086788   19.11 18.92     ~ 36 0
16 [VV2006] J112506.9-001648 QSO 11 25 06.9575609928 -00 16 47.613153144   19.93 19.73     ~ 32 0
17 QSO B1157+014 QSO 11 59 44.8278142392 +01 12 06.985999764   17.87 17.52     ~ 215 1
18 7C 1218+3359 QSO 12 20 33.8756544048 +33 43 12.026168040   18.80 18.61     ~ 252 1
19 QSO B1231+6215 QSO 12 34 11.7422435064 +61 58 32.482676280   19.53 19.08     ~ 39 0
20 QSO J1312+2319 QSO 13 12 13.5769317912 +23 19 58.592489484     18.30     ~ 45 0
21 [VV2006] J133701.4-024630 BLL 13 37 01.3951555392 -02 46 30.254123460   19.50 19.11     ~ 40 0
22 QSO J1413+4212 QSO 14 13 34.3910153496 +42 12 01.749666060   19.45 19.08     ~ 42 0
23 [VV2006] J144707.4+520341 QSO 14 47 07.4074145064 +52 03 40.161110004   18.63 18.30     ~ 36 0
24 [VV2006] J151630.3-005625 QSO 15 16 30.3101913336 -00 56 25.545204420   19.47 19.11     ~ 33 0
25 QSO J1556+3517 QSO 15 56 33.7774602000 +35 17 57.390028908   21.39 20.68 19.07   ~ 84 1
26 QSO J1624+3758 QSO 16 24 53.4799442184 +37 58 06.649886388   19.62 19.05 18.47   ~ 50 0
27 LBQS 2211-1915 QSO 22 14 37.8807173904 -19 00 57.134588580     18.20     ~ 23 0

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2022.11.30-17:24:16

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