2017A&A...604L...3H

Query : 2017A&A...604L...3H

2017A&A...604L...3H - Astronomy and Astrophysics, volume 604L3-3 (2017/8-1)

Polarization of the changing-look quasar J1011+5442.

HUTSEMEKERS D., AGIS GONZALEZ B., SLUSE D., RAMOS ALMEIDA C. and ACOSTA PULIDO J.-A.

Abstract (from CDS):

If the disappearance of the broad emission lines observed in changing-look quasars were caused by the obscuration of the quasar core through moving dust clouds in the torus, high linear polarization typical of type 2 quasars would be expected. We measured the polarization of the changing-look quasar J1011+5442 in which the broad emission lines have disappeared between 2003 and 2015. We found a polarization degree compatible with null polarization. This measurement suggests that the observed change of look is not due to a change of obscuration hiding the continuum source and the broad line region, and that the quasar is seen close to the system axis. Our results thus support the idea that the vanishing of the broad emission lines in J1011+5442 is due to an intrinsic dimming of the ionizing continuum source that is most likely caused by a rapid decrease in the rate of accretion onto the supermassive black hole.

Abstract Copyright: © ESO, 2017

Journal keyword(s): quasars: emission lines - quasars: general - quasars: general

Simbad objects: 43

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Number of rows : 43
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 LEDA 6178 Sy1 01 40 17.0678986752 -00 50 03.026578740   16.46 16.30 16.3   ~ 98 0
2 QSO B0148+090 Sy1 01 51 30.8 +09 17 25   17.43 17.50     ~ 36 0
3 HD 283812 * 04 44 24.9210299331 +25 31 42.390958427   10.24 9.5     A2 55 0
4 BD+52 913 WD* 05 05 30.6180977592 +52 49 51.919301604 10.25 11.44 11.69 11.93 12.108 DA.8 1153 0
5 HD 251204 s*b 06 05 05.6666038296 +23 23 38.533246404 10.21 10.52 10.2     B0 64 0
6 SDSS J081507.41+430427.0 Sy2 08 15 07.4180 +43 04 27.072   21.71 20.96     ~ 25 0
7 LIRAS J084234.94+362503.2 Sy2 08 42 34.9476759744 +36 25 03.133827336   20.95 20.51     ~ 29 0
8 QSO J0920+4531 Sy2 09 20 14.1265658136 +45 31 57.332417952   20.98 20.20     ~ 41 0
9 LEDA 2149945 Sy1 09 50 48.3803143440 +39 26 50.467298496   16.83 16.73     ~ 216 0
10 PG 0953+414 Sy1 09 56 52.3931554992 +41 15 22.211247636 14.710 15.611 15.546 15.294 14.720 ~ 472 0
11 2MASS J10115298+5442063 Sy1 10 11 52.9792003320 +54 42 06.373633896   18.62 18.31     ~ 53 0
12 2XMM J103951.5+643005 Sy2 10 39 51.4972195920 +64 30 04.258955664   20.55 20.10     ~ 47 0
13 PG 1049-005 Sy1 10 51 51.4474066944 -00 51 17.707987476   15.98 15.78     ~ 188 0
14 2MASS J11062199+0357474 Sy2 11 06 21.9582428832 +03 57 47.191010076   19.35 18.32     ~ 25 0
15 2MASS J11243917+4201450 Sy1 11 24 39.1797883104 +42 01 45.014547252   16.45 16.28     ~ 175 0
16 2MASSI J1132300-024620 Sy1 11 32 30.0965373960 -02 46 20.905196664   17.85 17.59     ~ 36 0
17 2MASSI J1134323-005547 Sy1 11 34 32.2941992544 -00 55 48.203042844   18.33 18.11     ~ 34 0
18 PG 1216+069 Sy1 12 19 20.9318278680 +06 38 38.467059252   15.68 15.65     ~ 302 0
19 RMB 53 QSO 12 19 46.5376285248 +14 52 59.356785036   18.54 18.43     ~ 32 0
20 LBQS 1244+1329 QSO 12 46 54.0312203976 +13 13 10.803255132   16.68 16.43     ~ 40 0
21 LBQS 1244-0126 QSO 12 47 30.9713080104 -01 42 27.833967288   19.10 18.82     ~ 27 0
22 LB 2522 Sy1 13 01 12.9250750776 +59 02 06.693816732   16.04 15.89     ~ 298 0
23 QSO J1323-0159 Sy2 13 23 23.334 -01 59 41.94   20.85 20.11     ~ 32 0
24 LBQS 1340-0038 QSO 13 42 51.6065445120 -00 53 45.385834848   17.15 16.98 17.418 16.198 ~ 87 0
25 2MASS J13563279+2103523 Sy1 13 56 32.7981405816 +21 03 52.378155576   15.85 17.07     ~ 104 0
26 2MASS J14003196+0404576 Sy1 14 00 31.9624647744 +04 04 57.667261656   16.68 16.58     ~ 67 0
27 SDSS J140740.08+021748.1 Sy2 14 07 40.0848100344 +02 17 48.218708256   21.01 20.03     ~ 18 0
28 QSO J1413-0142 Sy2 14 13 15.303 -01 42 21.02   21.00 20.51     ~ 29 0
29 2MASS J14294306+4747262 Sy1 14 29 43.0739786592 +47 47 26.217623904   17.29 16.97     ~ 195 0
30 2MASS J14464593+4035057 Sy1 14 46 45.9392259288 +40 35 05.797233636   16.28 16.11     ~ 302 0
31 SDSS J150608.08-020744.1 Sy2 15 06 08.085 -02 07 44.19   21.65 21.25     ~ 10 0
32 [VV2010c] J151711.5+033059 Sy2 15 17 11.48184 +03 31 00.2100   22.51 21.88     ~ 12 0
33 [VV2006c] J154340.0+493513 Sy2 15 43 40.0418507592 +49 35 12.455362032   22.22 21.57     ~ 11 0
34 PG 1543+489 Sy1 15 45 30.2358624864 +48 46 08.976390420   16.92 16.73     ~ 247 0
35 QSO B1612+266 QSO 16 14 10.6218233160 +26 32 50.447744736   17.33 17.11     ~ 39 0
36 2XMM J164131.6+385841 Sy2 16 41 31.723 +38 58 40.92   20.96 20.40     ~ 27 0
37 2MASS J17155976+2807169 Sy2 17 15 59.7902 +28 07 16.953   21.94 21.31 20.80   ~ 24 0
38 QSO B2141+040 QSO 21 44 22.9014948504 +04 16 26.315898204   17.1 17.50     ~ 12 0
39 QSO B2155+0154 Sy1 21 58 18.988 +02 08 49.73   17.0 17.0     ~ 13 0
40 [VV96] J222049.7-315654 QSO 22 20 49.7656145496 -31 56 54.036572460   17.6 17.1     ~ 13 0
41 [VV96] J232210.8-344757 QSO 23 22 10.9625714760 -34 47 57.174271800   16.5 16.5     ~ 14 0
42 [VV2000] J234844.8-361827 QSO 23 48 44.9974632192 -36 18 27.395135244     17.18     ~ 8 0
43 LBQS 2354+0013 * 23 57 29.9126085360 +00 29 44.476950876   17.4   18.5   B8: 11 0

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