Double-peaked Lines, Dual VLBI Components, and Precessing Jets in J1328+2751

Abstract

In this work, we report a radio galaxy with precessing jets, double-peaked emission lines and the presence of two compact radio components with a projected separation of ~6 parsec in Very Long Baseline Interferometry (VLBI) observations. The emission line peak separations could be suggesting the presence of a supermassive black hole binary (BBH) with a separation of 6.3 parsec, matching the VLBI results. The kinematic jet precession model applied to the jets of J1328+2751 indicates that if it is a BBH, the accretion disk of the primary black hole is not coplanar with the binary system orbit, making its jet precess under the effect of the torque produced by the secondary black hole. However, we find that the Bardeen-Petterson effect can also provide precession timescales compatible with the jet precession period inferred in this source. This source has previously been identified as a restarted double-double radio galaxy (DDRG). Our findings therefore have important ramifications for the nature of DDRGs in general.

18 pages, 7 figures, 1 table, accepted for publication in The Astrophysical Journal

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Cited by in corpus (7)

• Simulations of Precessing Jets and the Formation of X-shaped Radio Galaxies
• New mechanisms for forming multiple hotspots in radio jets
• Deep VLBI Observations Challenge Previous Evidence of a Binary Supermassive Black Hole Residing in the Seyfert Galaxy NGC 7674
• Probing AGN jet precession with LISA
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• Parsec-scale jet precession and a putative supermassive binary black hole system in the blazar AO 0235+164