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Jet opening angle and linear scale of launch region of blazars

Published online by Cambridge University Press:  29 January 2021

Xiang Liu
Xinjiang Astronomical Observatory, CAS, 150 Science-1 Street, Urumqi830011, China. Email: Qiannan Normal University for Nationalities, 558000Duyun, China
Pengfei Jiang
Xinjiang Astronomical Observatory, CAS, 150 Science-1 Street, Urumqi830011, China. Email: Graduate University of Chinese Academy of Sciences, Beijing100049, China
Lang Cui
Xinjiang Astronomical Observatory, CAS, 150 Science-1 Street, Urumqi830011, China. Email: Key Laboratory of Radio Astronomy, Chinese Academy of Sciences, Nanjing210008, China
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We explore the intrinsic jet opening angle (IJOA) of blazars, from the literature, we found that the blazar number density peaks around 0.5° of IJOA and declines quickly with increasing IJOA for flat spectrum radio quasars (FSRQs), while the number density has double peaks around 0.3° and 2.0° of IJOA for BL Lacs. We assume that the black hole accretion-produced jet may have the smaller IJOA (for its larger linear scale of launch region), and the BH spin-produced jet may have the larger IJOA (for its smaller launch region), such that the FSRQs are accretion dominated for their single peaked small IJOA, while the BL Lacs are either accretion or BH spin dominated for their double peaked IJOA.

Contributed Papers
© The Author(s), 2021. Published by Cambridge University Press on behalf of International Astronomical Union


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