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

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

Vibhore Negi
(
- Kumaun U. and
- Gorakhpur U.
)
,
Gopal-Krishna Gopal-Krishna
(
- Mumbai U., CBS
)
,
Gopal-Krishna
(
- Mumbai U., CBS
)
,
Hum Chand
(
- Central U. Himachal Pradesh
)
,
Silke Britzen
(
- Unlisted
)

Jun 9, 2023

Published in:

Mon.Not.Roy.Astron.Soc. 524 (2023) 1, L66-L71

Published: Jun 13, 2023

e-Print:

2306.06170 [astro-ph.HE]

DOI:

10.1093/mnrasl/slad077

View in:

ADS Abstract Service

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Abstract: (Oxford University Press)

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.

Note:

accepted for publication in MNRAS letters

galaxies: active
BL Lacertae objects: general
galaxies: jets
galaxies: photometry
quasars: general
polarization: optical
variability
TeV
superluminal
blazar

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