Multimessenger picture of FSRQ J1048+7143
E. Kun*, I. Jaroschewski, A. Ghorbanietemad, S. Frey, J. Becker Tjus, S. Britzen, K.É. Gabányi, V. Kiselev, L. Schlegel, M. Schroller, L. Cui, X. Wang, Y. Shen and P. Reichherzer
Pre-published on:
August 09, 2023
Published on:
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Abstract
In this paper we present the multimessenger picture of the a 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 $\gamma$-ray flares, such that each of the flares consists of two subflares. By analyzing arcsec-scale and milliarcsec-scale radio interferometric observations, we find signatures of jet precession. 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.
DOI: https://doi.org/10.22323/1.444.1587
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