Intranight optical variability of TeV blazars with parsec-scale jets dominated by slow-moving radio knots

被引：1

作者：

Negi, Vibhore ^{[1
,2
]}

Gopal-Krishna ^{[3
]}

Chand, Hum ^{[4
]}

Britzen, Silke ^{[5
]}

机构：

[1] Aryabhatta Res Inst Observat Sci ARIES, Naini Tal 263002, India

[2] Deen Dayal Upadhyaya Gorakhpur Univ, Dept Phys, Gorakhpur 273009, India

[3] UM DAE Ctr Excellence Basic Sci, Mumbai 400098, India

[4] Cent Univ Himachal Pradesh CUHP, Dept Phys & Astron Sci, Dharamshala 176215, India

[5] Max Planck Inst Radioastron, Huegel 69, D-53121 Bonn, Germany

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2023年 / 524卷 / 01期

关键词：

galaxies: active; BL Lacertae objects: general; galaxies: jets; galaxies: photometry; quasars: general; ACTIVE GALACTIC NUCLEI; BL-LACERTAE OBJECTS; GAMMA-RAY EMISSION; RELATIVISTIC JETS; COMPLETE SAMPLE; INTRADAY VARIABILITY; HOST GALAXY; KINEMATICS; LAC; MICROVARIABILITY;

D O I：

10.1093/mnrasl/slad077

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

BL Lac objects detected at TeV energies preferentially belong to the subclass called 'high-frequency-peaked' BL Lacs (HBLs). Parsec-scale radio jets in these TeV-HBLs often show dominant, slow-moving radio knots that are at most mildly superluminal. We report the first systematic campaign to characterize the intranight optical variability (INOV) of TeV-HBLs using a representative sample of six such sources, all showing a fairly high degree of optical polarization. Our campaign consists of high-sensitivity monitoring of this sample in 24 sessions of more than 3 h duration each. For these TeV-HBLs, we find a striking lack of INOV and based on this, we discuss the importance of superluminal motion of the radio knots vis-a-vis the optical polarization, as the key diagnostic for INOV detection.

引用

页码：L66 / L71

页数：6

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