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

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

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

Full paper

View the references in ADS

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 - 2023	#notes
1	QSO B0138-097	BLL	01 41 25.83216015	-09 28 43.6742470		16.94	16.55	17.21		~	267	3
2	3C 66A	BLL	02 22 39.6114771888	+43 02 07.799534304		15.71	15.21	14.5		~	872	1
3	QSO B0237-2322	QSO	02 40 08.1743783856	-23 09 15.729012036		16.78	16.63			~	503	0
4	QSO B0422+004	BLL	04 24 46.8421990080	+00 36 06.329375028	16.15	15.94	16.98			~	349	1
5	QSO J0738+1742	BLL	07 38 07.39375312	+17 42 18.9981506		16.76	16.22	15.78		~	968	1
6	QSO B0823-223	BLL	08 26 01.5730900658	-22 30 27.204409684		16.11	16.20			~	200	1
7	QSO J0854+2006	BLL	08 54 48.8749846272	+20 06 30.639583620		15.91	15.43	15.56		~	2275	1
8	Ve 6-23	LP?	09 06 00.0118809024	-47 18 58.165963236	14.28	13.83	12.12			B0V	42	0
9	Ton 469	Sy1	09 58 20.9496221568	+32 24 02.208417372		15.88	15.78	15.51		~	424	1
10	LP 790-20	PM*	10 26 29.2737631536	-18 01 47.914765572			16.36			~	4	0
11	Mrk 421	BLL	11 04 27.3140835504	+38 12 31.798495872		13.50	12.90	8.31		~	2615	1
12	QSO B1120+0154	QSO	11 23 20.7258496872	+01 37 47.506567620		16.45	16.12			~	128	1
13	QSO B1124-186	QSO	11 27 04.39245388	-18 57 17.4418445		19.17	18.65	19.23		~	216	1
14	QSO J1130-1449	QSO	11 30 07.0523452128	-14 49 27.388021944		17.17	16.90	16	16.97	~	691	1
15	Ton 599	QSO	11 59 31.83391383	+29 14 43.8268224		14.80	14.41	17.652	13.39	~	899	1
16	QSO B1157+014	QSO	11 59 44.8278142392	+01 12 06.985999764		17.87	17.52			~	221	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			~	68	1
20	QSO B1216-010	BLL	12 18 34.9299611304	-01 19 54.342898428	18.43	18.30	18.01	18.2		~	102	0
21	Ton 1530	QSO	12 25 27.3983971728	+22 35 13.016712084		15.49	17.00			~	191	0
22	3C 273	BLL	12 29 06.6998257176	+02 03 08.597629980		13.05	14.830	14.11		~	5713	1
23	QSO J1246-2547	QSO	12 46 46.80203943	-25 47 49.2889822		17.65	17.41	16.96	15.5	~	270	1
24	QSO B1246-0542	QSO	12 49 13.8611499816	-05 59 19.059589068		17.09	16.73			~	169	0
25	3C 279	Bla	12 56 11.16657958	-05 47 21.5251510		18.01	17.75	15.87		~	2981	2
26	QSO B1254+0443	QSO	12 56 59.9234909976	+04 27 34.411850136		16.53	16.25			~	157	0
27	QSO B1256-229	BLL	12 59 08.46204170	-23 10 38.6543799		18.0		15.9		~	51	1
28	7C 1308+3236	BLL	13 10 28.66385420	+32 20 43.7828340		15.61	15.24	17.91		~	827	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		~	234	0
33	LBQS 1429-0053	QSO	14 32 29.2470168768	-01 06 16.088882724		18.10	17.88			~	107	0
34	QSO B1634+7037	QSO	16 34 28.9917184368	+70 31 32.393436960		14.90	14.66			~	267	0
35	3C 345	QSO	16 42 58.80997043	+39 48 36.9939552		16.81	16.59	16.84		~	1678	2
36	HD 155197	*	17 10 15.7466372208	-04 50 03.657092136		10.16	9.56			F0V	49	0
37	CD-28 13479	*	17 43 19.5888438432	-28 40 32.665638756	11.17	11.36	10.61	10.46		B1II-III:nn	32	0
38	QSO J2123+0535	QSO	21 23 44.51739933	+05 35 22.0930238		18.3	20.40	19.86		~	281	1
39	QSO B2128-123	BLL	21 31 35.2617909696	-12 07 04.795364172		16.33	16.11	15.87		~	452	1
40	QSO B2155-152	QSO	21 58 06.28188411	-15 01 09.3284729		18.63	18.30	17.79		~	318	1
41	QSO B2155-304	BLL	21 58 52.0652249880	-30 13 32.118447792		13.36	13.09	12.62		~	1698	1
42	NAME BL Lac	BLL	22 02 43.2913536816	+42 16 39.979416792		15.66	14.72			~	2215	1
43	4C 11.69	QSO	22 32 36.40890093	+11 43 50.9040592		17.75	17.33			~	1090	2
44	PB 5235	QSO	23 04 44.9534365920	+03 11 45.917366280		15.44	15.8			~	104	0

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