Neutrino Cadence of TXS 0506+056 Consistent with Supermassive Binary Origin

Tjus, J. Becker; Jaroschewski, Ilja; Ghorbanietemad, Armin; Bartos, I.; Kun, Emma; Biermann, P. L.

doi:10.3847/2041-8213/aca65d

Cited by 7 publications

(1 citation statement)

References 37 publications

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“…Transport characteristics of charged particles in these magnetized environments influence the temporal evolution of multi-messenger emission [15][16][17]. (Quasi)periodic behavior is observed in supermassive black hole binary systems, caused by, for example, the precession of the relativistic jet due to spin-orbit precession [18,19]. Currently, FLaapLUC [20] alerts on Fermi-LAT detected flares, and searches for ATels about flaring AGNs are accessible within Astro-COLIBRI.…”

Section: Astro-colibri Science Driversmentioning

confidence: 99%

Astro-COLIBRI 2—An Advanced Platform for Real-Time Multi-Messenger Discoveries

et al. 2023

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The study of flaring astrophysical events in the multi-messenger approach requires instantaneous follow-up observations to better understand the nature of these events through complementary observational data. We present Astro-COLIBRI as a platform that integrates specific tools in the real-time multi-messenger ecosystem. The Astro-COLIBRI platform bundles and evaluates alerts about transients from various channels. It further automates the coordination of follow-up observations by providing and linking detailed information through its comprehensible graphical user interface. We present the functionalities with documented examples of Astro-COLIBRI usage through the community since its public release in August 2021. We highlight the use cases of Astro-COLIBRI for planning follow-up observations by professional and amateur astronomers, as well as checking predictions from theoretical models.

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Section: Astro-colibri Science Driversmentioning

confidence: 99%

Astro-COLIBRI 2—An Advanced Platform for Real-Time Multi-Messenger Discoveries

et al. 2023

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Signatures of a spinning supermassive black hole binary on the mas-scale jet of the quasar S5 1928+738 based on 25 yr of VLBI data

Kun,

Britzen,

Frey

et al. 2023

Monthly Notices of the Royal Astronomical Society

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In a previous work, we have identified the spin of the dominant black hole of a binary from its jet properties. Analysing Very Long Baseline Array (VLBA) observations of the quasar S5 1928+738, taken at 15-GHz during 43 epochs between 1995.96 and 2013.06, we showed that the inclination angle variation of the inner (<2 mas) jet symmetry axis naturally decomposes into a periodic and a monotonic contribution. The former emerges due to the Keplerian orbital evolution, while the latter is interpreted as the signature of the spin-orbit precession of the jet emitting black hole. In this paper, we revisit the analysis of the quasar S5 1928+738 by including new 15-GHz VLBA observations extending over 29 additional epochs, between 2013.34 and 2020.89. The extended data set confirms our previous findings which are further supported by the flux density variation of the jet. By applying an enhanced jet precession model that can handle arbitrary spin orientations κ with respect to the orbital angular momentum of a binary supermassive black hole system, we estimate the binary mass ratio as ν = 0.21 ± 0.04 for κ = 0 (i.e. when the spin direction is perpendicular to the orbital plane) and as ν = 0.32 ± 0.07 for κ = π/2 (i.e. when the spin lies in the orbital plane). We estimate more precisely the spin precession velocity, halving its uncertainty from ( − 0.05 ± 0.02)○ yr−1 to ( − 0.04 ± 0.01)○ yr−1.

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A two-step strategy to identify episodic sources of gravitational waves and high-energy neutrinos in starburst galaxies

Allen,

Biermann,

Caramete

et al. 2024

Front. Astron. Space Sci.

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Supermassive black hole (BH) mergers with spin-flips accelerate energetic particles through their relativistic precessing jets, producing high-energy neutrinos and finally gravitational waves (GWs). In star formation, massive stars form in pairs, triplets, and quadruplets, allowing second-generation mergers of the remnants with discrepant spin directions. The GW data support such a scenario. Earlier, we suggested that stellar mass BH mergers (visible in M82) with an associated spin-flip analogously allow the acceleration of energetic particles, with ensuing high-energy neutrinos and high-energy photons, and finally produce GWs. At cosmic distances, only the GWs and the neutrinos remain detectable. In this study, we generalize the argument to starburst and normal galaxies throughout their cosmic evolution and show that these galaxies may dominate over active galactic nuclei (AGN) in the flux of ultra-high-energy particles observed at Earth. All these sources contribute to the cosmic neutrino background, as well as the GW background (they detected lower frequencies). We outline a search strategy to find such episodic sources, which requires including both luminosity and flux density.

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Neutrino Cadence of TXS 0506+056 Consistent with Supermassive Binary Origin

Cited by 7 publications

References 37 publications

Astro-COLIBRI 2—An Advanced Platform for Real-Time Multi-Messenger Discoveries

Astro-COLIBRI 2—An Advanced Platform for Real-Time Multi-Messenger Discoveries

Signatures of a spinning supermassive black hole binary on the mas-scale jet of the quasar S5 1928+738 based on 25 yr of VLBI data

A two-step strategy to identify episodic sources of gravitational waves and high-energy neutrinos in starburst galaxies

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