2024A&A...689A..35C

Query : 2024A&A...689A..35C

2024A&A...689A..35C - Astronomy and Astrophysics, volume 689A35 (2024/9-1)

Quasi-periodic oscillation analysis for a sample of blazars at the optical band.

CHEN Z.-H. and JIANG Y.

Abstract (from CDS):

Context. Quasi-periodic behavior in the light curves of blazars can help us understand the physics. The identification of the supermassive black hole binary (SMBHB) is an active topic, and the periodicity analysis of light curves is a powerful method for searching for these sources.
Aims. In this work, we aim to identify quasi-periodic oscillations (QPOs) in the optical band light curves in our sample and discuss the possible physical origins behind these targets.
Methods. In this study, we collected 155 optical band light curves from three different monitoring programs. We searched for QPOs in our sample using the generalised Lomb-Scargle (GLS) and weighted wavelet Z-transform (WWZ) methods. We simulated 104 artificial light curves and evaluated the significance of the results using the Monte Carlo method.
Results. Our work reveals that 18 targets show QPOs with timescales ranging from 200 days to 1400 days. These QPOs could be explained by three scenarios, including the SMBHB, instability of thick disks and jet precession. Since the frequencies corresponding to QPOs are in the nHz regime, our work provides candidates of SMBHBs for further verification.

Abstract Copyright: © The Authors 2024

Journal keyword(s): galaxies: active - BL Lacertae objects: general - galaxies: jets - quasars: general

Simbad objects: 38

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Number of rows : 38
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 QSO B0219-1628 Bla 02 22 00.72502859 -16 15 16.5480927   15.38 15.00 18.14   ~ 125 1
2 3C 66A BLL 02 22 39.6114771888 +43 02 07.799534304   15.71 15.21 14.5   ~ 942 2
3 QSO B0235+1624 BLL 02 38 38.93010450 +16 36 59.2745528   16.46 15.50 15.92   ~ 1614 2
4 PKS J0303-2407 BLL 03 03 26.5025589984 -24 07 11.426291220   16.55 16.18     ~ 249 1
5 ICRF J040549.2+380332 SyG 04 05 49.26287155 +38 03 32.2348497   18.5 18.5     ~ 187 3
6 QSO B0405-385 Bla 04 06 59.03533781 -38 26 28.0423651   19.55 18.0     ~ 250 2
7 PMN J0509+0541 BLL 05 09 25.9644373872 +05 41 35.333820420 15.32 14.95 14.78 15.12   ~ 589 2
8 QSO B0537-441 BLL 05 38 50.36155950 -44 05 08.9390233   15.77 16.48 16   ~ 924 2
9 PMN J0630-2406 BLL 06 30 59.5217586120 -24 06 46.204083144 16.48 16.22 16.04 16   ~ 97 1
10 RX J0650.7+2502 BLL 06 50 46.4900658984 +25 02 59.625654828 16.17 15.97 15.79 16.3   ~ 175 2
11 8C 0716+714 BLL 07 21 53.4482942664 +71 20 36.363846516   15.5 15.50 14.27   ~ 1388 1
12 4C 14.23 BLL 07 25 16.80776465 +14 25 13.7465925       17.48   ~ 170 1
13 ICRF J075426.4-114716 BLL 07 54 26.4562390440 -11 47 16.944994572       18.2   ~ 72 1
14 PMN J0816-1311 BLL 08 16 27.2037492048 -13 11 52.623678156 17.15 17.09 17.00 16.93   ~ 80 1
15 QSO B0818-128 BLL 08 20 57.44762374 -12 58 59.1692275   15.30 15.00 16.5   ~ 187 1
16 4C 56.16A Bla 08 24 47.23636459 +55 52 42.6693589   18.52 18.19 17.82   ~ 216 1
17 PG 0851+202 BLL 08 54 48.8749846272 +20 06 30.639583620   15.649 15.146 15.446   ~ 2513 1
18 RX J1037.7+5711 BLL 10 37 44.3078432736 +57 11 55.629345156   17.05 16.54 16.7   ~ 131 1
19 3C 273 BLL 12 29 06.6998257176 +02 03 08.597629980   13.05 14.830 14.11   ~ 6022 1
20 Ton 116 BLL 12 43 12.7362011736 +36 27 43.997592204   17.41 17.11 16.4   ~ 112 1
21 LB 2449 BLL 12 48 18.7847605224 +58 20 28.717260720   16.10 15.78 15.19   ~ 215 1
22 3C 279 Bla 12 56 11.16657958 -05 47 21.5251510   18.01 17.75 15.87   ~ 3205 2
23 ICRF J135938.0+401138 Bla 13 59 38.09426177 +40 11 38.2506777     19.2 17.00   ~ 69 1
24 [FK2005] 25 ULX 14 03 19.63 -41 22 58.7           ~ 252 0
25 2MASS J14405293+0610162 BLL 14 40 52.9387587024 +06 10 16.192432236 17.77 17.41 17.34     ~ 76 1
26 QSO J1512-0906 Bla 15 12 50.53293048 -09 05 59.8297908   16.74 16.54     ~ 1409 1
27 7C 1520+3154 Bla 15 22 09.99173254 +31 44 14.3819383   20.45 19.89 19.87   ~ 230 1
28 PG 1553+113 BLL 15 55 43.0440048528 +11 11 24.365649948 14.91 14.72 14.57 13.99   ~ 672 1
29 4C 38.41 Bla 16 35 15.49297809 +38 08 04.5005995   18.14 17.97 17.25   ~ 906 1
30 3C 345 Bla 16 42 58.80997043 +39 48 36.9939552   16.81 16.59 16.84   ~ 1808 3
31 V* V1033 Sco HXB 16 54 00.1423963019 -39 50 44.761701340       16.14   F3-6IV 1980 0
32 4C 51.37 Bla 17 40 36.97784792 +52 11 43.4073694   18.16 18.70 16.73   ~ 441 1
33 1RXS J205528.2-002123 BLL 20 55 28.2308834496 -00 21 17.159442048   18.3 18.07 18.5   ~ 65 1
34 4C -02.81 BLL 21 34 10.30958988 -01 53 17.2389056   18.6 19.00 18.87   ~ 431 1
35 NAME BL Lac BLL 22 02 43.2913536816 +42 16 39.979416792   15.66 14.72     ~ 2397 1
36 [VV2006] J221648.6+012427 QSO 22 16 48.6855991968 +01 24 26.675677080     19.31     ~ 33 0
37 4C 11.69 Bla 22 32 36.40890093 +11 43 50.9040592   17.75 17.33     ~ 1205 2
38 PKS J2249-1251 rG 22 49 59.61247455 -12 51 16.8243273           ~ 68 1

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