Multimessenger Picture of the FSRQ J1048+7143
Paper in proceeding, 2024
In this paper we present the multimessenger picture of the flat-spectrum radio quasar (FSRQ) J1048+7143, a blazar showing gamma-ray quasi-periodic oscillations. We generate the adaptively binned Fermi-LAT light curve of this source above 168 MeV and find three major γ-ray flares, such that each of the flares resolves into two subflares. By analyzing arcsec-scale and milliarcsecscale radio interferometric observations, we find signatures of the precession of a spine–sheath structured jet. We analyze the 5 GHz total flux density curve of J1048+7143 taken with single-dish radio telescopes, and find three complete radio flares that are also suggestive of jet precession. We model the timing of gamma-ray flares as a signature of the spin-orbit precession in a supermassive black hole binary and find that the binary could merge in the next 60–80 yrs.
Author
Emma Kun
Ruhr-Universität Bochum
Hungarian Academy of Sciences
Research Centre For Astronomy and Earth Sciences
Ilja Jaroschewski
Ruhr-Universität Bochum
Armin Ghorbanietemad
Ruhr-Universität Bochum
S. Frey
Research Centre For Astronomy and Earth Sciences
Hungarian Academy of Sciences
Eötvös Loránd University (ELTE)
Julia Tjus
Ruhr-Universität Bochum
Chalmers, Space, Earth and Environment, Astronomy and Plasmaphysics
Silke Britzen
Max Planck Society
Krisztina E. Gabányi
Eötvös Loránd University (ELTE)
Hungarian Academy of Sciences
Research Centre For Astronomy and Earth Sciences
Vladimir Kiselev
Ruhr-Universität Bochum
Leander Schlegel
Ruhr-Universität Bochum
Marcel Schroller
Ruhr-Universität Bochum
Lang Cui
Chinese Academy of Sciences
Xin Wang
Chinese Academy of Sciences
Yuling Shen
Chinese Academy of Sciences
P. Reichherzer
University of Oxford
Proceedings of Science
18248039 (eISSN)
Vol. 444 1587
38th International Cosmic Ray Conference, ICRC 2023
Nagoya, Japan,
Nagoya, Japan,
Subject Categories (SSIF 2025)
Astronomy, Astrophysics, and Cosmology