2024A&A...689A.200L

Query : 2024A&A...689A.200L

2024A&A...689A.200L - Astronomy and Astrophysics, volume 689A200 (2024/9-1)

Testing particle acceleration in blazar jets with continuous high-cadence optical polarization observations.

LIODAKIS I., KIEHLMANN S., MARSCHER A.P., ZHANG H., BLINOV D., JORSTAD S.G., AGUDO I., BENITEZ E., BERDYUGIN A., BONNOLI G., CASADIO C., CHEN C.-T., CHEN W.-P., EHLERT S.R., ESCUDERO J., GRISHINA T.S., HIRIART D., HSU A., IMAZAWA R., JERMAK H.E., JOSE J., KAARET P., KOPATSKAYA E.N., LALCHAND B., LARIONOVA E.G., LINDFORS E., LOPEZ J.M., McCALL C., MOROZOVA D.A., PALAIOLOGOU E., PANDEY S., POUTANEN J., RAKSHIT S., REIG P., SASADA M., SAVCHENKO S.S., SHABLOVINSKAYA E., NEHA S., SHRESTHA M., STEELE I.A., TROITSKIY I.S., TROITSKAYA Y.V., UEMURA M., VASILYEV A.A., WEAVER Z., WIERSEMA K. and WEISSKOPF M.C.

Abstract (from CDS):

Variability can be the pathway to understanding the physical processes in astrophysical jets. However, the high-cadence observations required to test particle acceleration models are still missing. Here we report on the first attempt to produce continuous, > 24 hour polarization light curves of blazars using telescopes distributed across the globe, following the rotation of the Earth, to avoid the rising Sun. Our campaign involved 16 telescopes in Asia, Europe, and North America. We observed BL Lacertae and CGRaBS J0211+1051 for a combined 685 telescope hours. We find large variations in the polarization degree and angle for both sources on sub-hour timescales as well as a ∼180° rotation of the polarization angle in CGRaBS J0211+1051 in less than two days. We compared our high-cadence observations to particle-in-cell magnetic reconnection and turbulent plasma simulations. We find that although the state-of-the-art simulation frameworks can produce a large fraction of the polarization properties, they do not account for the entirety of the observed polarization behavior in blazar jets.

Abstract Copyright: © The Authors 2024

Journal keyword(s): radiation mechanisms: non-thermal - techniques: polarimetric - galaxies: active - BL Lacertae objects: general - galaxies: jets

Simbad objects: 10

Full paper

View the references in ADS

Number of rows : 10

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	HD 236928	*	02 02 42.0929404728	+60 15 26.433482364		10.00	9.07			A4Ib	108	0
2	ICRF J021113.1+105134	BLL	02 11 13.1774921592	+10 51 34.798753116	13.96	13.63	13.40	15.42		~	161	1
3	HD 14069	*	02 16 45.1936420248	+07 41 10.637150532		9.21	9.06			A0	61	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	Z 184-50	BLL	11 04 27.3140835504	+38 12 31.798495872		13.50	12.90	8.31		~	2841	1
6	HD 331891	*	20 12 02.1491491944	+32 47 43.692993636		9.53	9.31			A0	67	0
7	HD 204827	SB*	21 28 57.7592315784	+58 44 23.238427956	8.63	8.74	7.94	7.25	6.76	O9.5IV	372	0
8	BD+28 4211	HS*	21 51 11.0221915656	+28 51 50.367627468	8.922	10.25	10.58	10.656	10.831	sdO2VIIIHe5	837	0
9	NAME BL Lac	BLL	22 02 43.2913536816	+42 16 39.979416792		15.66	14.72			~	2397	1
10	HD 212311	*	22 21 58.5830044224	+56 31 52.717561716		8.20	8.12			A0	65	0

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