2018RAA....18..150L

Query : 2018RAA....18..150L

2018RAA....18..150L - Research in Astron. and astroph., 18, 150-150 (2018/December-0)

Long-term optical color behavior of a sample of blazars.

LI X.-P., LUO Y.-H., YANG H.-T., YANG H.-Y., YANG C. and CAI Y.

Abstract (from CDS):

We report on the optical color variability of a sample of 24 blazars, consisting of nine flat spectrum radio quasars (FSRQs) and 15 BL Lacertae objects (BL Lacs), on timescales of years using simultaneous V - and R-band observations observed by the Kanata telescope at Higashi-Hiroshima Observatory. The correlations between color indices V - R and magnitudes reveal that 11 BL Lacs and one FSRQ exhibited significant (i.e., r > 0.2 and P < 0.01) bluer-when-brighter (BWB) trend and two FSRQs followed the redder-when-brighter (RWB) tend, indicating a possibility that the BWB chromatic trend is dominant for BL Lacs and the RWB trend is especially found in FSRQs, which has been presented occasionally in different samples of blazars. The superpositions of the red emission component from the Doppler-boosted relativistic jet and the blue component arising from the accretion disk might be a possible interpretation for the long-term color behaviors.

Abstract Copyright: ∼

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

Simbad objects: 25

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Number of rows : 25
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 B0048-09 BLL 00 50 41.3172421464 -09 29 05.210474100 16.74 16.39 16.22 16.14   ~ 480 2
2 QSO B0109+224 BLL 01 12 05.8247044608 +22 44 38.785880796   16.00 15.66 15.47   ~ 373 2
3 3C 66A BLL 02 22 39.6114771888 +43 02 07.799534304   15.71 15.21 14.5   ~ 942 2
4 QSO B0235+1624 BLL 02 38 38.93010450 +16 36 59.2745528   16.46 15.50 15.92   ~ 1614 2
5 6C 032130+340016 BLL 03 24 41.1612813408 +34 10 45.857918460     15.72 13.1   ~ 314 1
6 QSO J0457-2324 Bla 04 57 03.1791422424 -23 24 52.021129572   18.85 18.5 16.56   ~ 435 1
7 8C 0716+714 BLL 07 21 53.4482942664 +71 20 36.363846516   15.5 15.50 14.27   ~ 1388 1
8 RX J0809.8+5218 BLL 08 09 49.1868285744 +52 18 58.249938744   16.11 15.59 14.6   ~ 302 1
9 QSO B0829+047 BLL 08 31 48.8770033992 +04 29 39.086842884   17.10 16.4 14.55   ~ 511 2
10 PG 0851+202 BLL 08 54 48.8749846272 +20 06 30.639583620   15.649 15.146 15.446   ~ 2513 1
11 QSO J0948+0022 Bla 09 48 57.32005819 +00 22 25.5596984   18.85 18.61 18.17   ~ 350 2
12 7C 1219+2830 BLL 12 21 31.6904439888 +28 13 58.500308172   16.81 16.11 14.24   ~ 924 1
13 3C 273 BLL 12 29 06.6998257176 +02 03 08.597629980   13.05 14.830 14.11   ~ 6022 1
14 3C 279 Bla 12 56 11.16657958 -05 47 21.5251510   18.01 17.75 15.87   ~ 3205 2
15 QSO J1512-0906 Bla 15 12 50.53293048 -09 05 59.8297908   16.74 16.54     ~ 1409 1
16 PG 1553+113 BLL 15 55 43.0440048528 +11 11 24.365649948 14.91 14.72 14.57 13.99   ~ 672 1
17 Z 225-7 BLL 16 53 52.21668403 +39 45 36.6088754 14.09 14.15 13.29 8.26   ~ 2304 2
18 RX J1725.0+1152 BLL 17 25 04.3409350008 +11 52 15.471967296   16.29 15.77 14.45   ~ 221 1
19 4C 09.57 BLL 17 51 32.81857326 +09 39 00.7284066   17.46 16.78 15.57   ~ 1007 1
20 Z 340-35 BLL 18 06 50.6802916920 +69 49 28.109609256   14.77 14.22 11.39   ~ 909 1
21 PKS J2158-3013 BLL 21 58 52.0652249880 -30 13 32.118447792   13.36 13.09 12.62   ~ 1829 1
22 NAME BL Lac BLL 22 02 43.2913536816 +42 16 39.979416792   15.66 14.72     ~ 2397 1
23 4C 11.69 Bla 22 32 36.40890093 +11 43 50.9040592   17.75 17.33     ~ 1205 2
24 3C 454.3 Bla 22 53 57.7480438728 +16 08 53.561508864   16.57 16.10 15.22   ~ 3004 2
25 QSO B2344+514 BLL 23 47 04.8372110928 +51 42 17.877513168     15.50 10.7   ~ 500 1

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