2010A&A...520L...7H

Query : 2010A&A...520L...7H

2010A&A...520L...7H - Astronomy and Astrophysics, volume 520L7-7 (2010/9-2)

Optical circular polarization in quasars.

HUTSEMEKERS D., BORGUET B., SLUSE D., CABANAC R. and LAMY H.

Abstract (from CDS):

We present new optical circular polarization measurements with typical uncertainties <0.1% for a sample of 21 quasars. All but two objects have null circular polarization. We use this result to constrain the polarization due to photon-pseudoscalar mixing along the line of sight. We detect significant (>3σ) circular polarization in two blazars with high linear polarization and discuss the implications of this result for quasar physics. In particular, the recorded polarization degrees may be indicative of magnetic fields as strong as 1kG or a significant contribution of inverse Compton scattering to the optical continuum.

Abstract Copyright: ∼

Journal keyword(s): quasars: general - polarization

Simbad objects: 44

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Number of rows : 44
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 1RXS J014126.8-092857 BLL 01 41 25.83216015 -09 28 43.6742470   16.94 16.55 17.21   ~ 302 1
2 3C 66A BLL 02 22 39.6114771888 +43 02 07.799534304   15.71 15.21 14.5   ~ 942 2
3 QSO B0237-2322 QSO 02 40 08.1743783856 -23 09 15.729012036   16.78 16.63     ~ 516 1
4 QSO B0422+004 BLL 04 24 46.8421990080 +00 36 06.329375028 16.15 15.94 16.98     ~ 378 1
5 QSO J0738+1742 BLL 07 38 07.39375312 +17 42 18.9981506   16.76 16.22 15.78   ~ 1045 1
6 QSO B0823-223 BLL 08 26 01.5730900658 -22 30 27.204409684   16.11 16.20     ~ 224 1
7 PG 0851+202 BLL 08 54 48.8749846272 +20 06 30.639583620   15.649 15.146 15.446   ~ 2513 1
8 Ve 6-23 Or* 09 06 00.0118809024 -47 18 58.165963236 14.28 13.83 12.12     B0V 54 0
9 Ton 469 Bla 09 58 20.9496221568 +32 24 02.208417372   15.88 15.78 15.51   ~ 442 1
10 LP 790-20 PM* 10 26 29.2737631536 -18 01 47.914765572     16.36     ~ 5 0
11 Z 184-50 BLL 11 04 27.3140835504 +38 12 31.798495872   13.50 12.90 8.31   ~ 2841 1
12 QSO B1120+0154 QSO 11 23 20.7258496872 +01 37 47.506567620   16.45 16.12     ~ 135 1
13 QSO B1124-186 Bla 11 27 04.39245388 -18 57 17.4418445   19.17 18.65 19.23   ~ 254 1
14 QSO J1130-1449 Bla 11 30 07.0523452128 -14 49 27.388021944   17.17 16.90 16 16.97 ~ 739 1
15 Ton 599 Bla 11 59 31.83391383 +29 14 43.8268224   14.80 14.41 17.652 13.39 ~ 989 1
16 QSO B1157+014 QSO 11 59 44.8278142392 +01 12 06.985999764   17.87 17.52     ~ 228 1
17 LBQS 1205+1436 QSO 12 08 25.3793405568 +14 19 21.088375248     18.5     ~ 42 0
18 LBQS 1212+1445 QSO 12 14 40.2739153080 +14 28 59.288879460     17.9     ~ 65 0
19 QSO B1215-002 BLL 12 17 58.7290559400 -00 29 46.299485004   18.61 17.95     ~ 85 1
20 QSO B1216-010 BLL 12 18 34.9299611304 -01 19 54.342898428 18.43 18.30 18.01 18.2   ~ 119 1
21 Ton 1530 QSO 12 25 27.3983971728 +22 35 13.016712084   15.49 17.00     ~ 192 0
22 3C 273 BLL 12 29 06.6998257176 +02 03 08.597629980   13.05 14.830 14.11   ~ 6022 1
23 QSO J1246-2547 Bla 12 46 46.80203943 -25 47 49.2889822   17.65 17.41 16.96 15.5 ~ 314 1
24 QSO B1246-0542 QSO 12 49 13.8611499816 -05 59 19.059589068   17.09 16.73     ~ 173 0
25 3C 279 Bla 12 56 11.16657958 -05 47 21.5251510   18.01 17.75 15.87   ~ 3205 2
26 QSO B1254+0443 QSO 12 56 59.9234909976 +04 27 34.411850136   16.53 16.25     ~ 160 0
27 QSO B1256-229 BLL 12 59 08.46204170 -23 10 38.6543799   18.0   15.9   ~ 57 1
28 US 371 BLL 13 10 28.66385420 +32 20 43.7828340   15.61 15.24 17.91   ~ 917 1
29 QSO J1311-0552 QSO 13 11 36.5570912928 -05 52 38.632308600   17.85 17.44     ~ 75 0
30 LBQS 1331-0108 QSO 13 34 28.0613578464 -01 23 49.042287744   18.61 17.97     ~ 73 0
31 [VV96] J134204.4-181801 QSO 13 42 04.4095105536 -18 18 02.600690940   17.34 17.34     ~ 8 0
32 [OKM2018] SWIFT J1419.0-1323 Sy1 14 19 03.8170514760 -13 10 44.785212600   16.46 16.10 16.50   ~ 245 0
33 LBQS 1429-0053 QSO 14 32 29.2470168768 -01 06 16.088882724   18.10 17.88     ~ 110 0
34 QSO B1634+7037 QSO 16 34 28.9917184368 +70 31 32.393436960   14.90 14.66     ~ 273 0
35 3C 345 Bla 16 42 58.80997043 +39 48 36.9939552   16.81 16.59 16.84   ~ 1808 3
36 HD 155197 * 17 10 15.7466372208 -04 50 03.657092136   10.16 9.56     F0V 53 0
37 CD-28 13479 * 17 43 19.5888438432 -28 40 32.665638756 11.17 11.36 10.61 10.46   B1II-III:nn 40 0
38 QSO J2123+0535 Bla 21 23 44.51739933 +05 35 22.0930238   18.3 20.40 19.86   ~ 320 1
39 QSO B2128-123 BLL 21 31 35.2617909696 -12 07 04.795364172   16.33 16.11 15.87   ~ 470 1
40 QSO B2155-152 Bla 21 58 06.28188411 -15 01 09.3284729   18.63 18.30 17.79   ~ 355 1
41 PKS J2158-3013 BLL 21 58 52.0652249880 -30 13 32.118447792   13.36 13.09 12.62   ~ 1829 1
42 NAME BL Lac BLL 22 02 43.2913536816 +42 16 39.979416792   15.66 14.72     ~ 2397 1
43 4C 11.69 Bla 22 32 36.40890093 +11 43 50.9040592   17.75 17.33     ~ 1205 2
44 PB 5235 QSO 23 04 44.9534365920 +03 11 45.917366280   15.44 15.8     ~ 105 0

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