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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

A hadronic emission model for black hole-disc impacts in the blazar OJ 287

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Rodriguez-Ramirez, J. C. [1] ; Kushwaha, P. [2, 1] ; de Gouveia Dal Pino, E. M. [1] ; Santos-Lima, R. [1]
Total Authors: 4
[1] Univ Sao Paulo, Inst Astron Geofis & Ciencias Atmosfer IAG USP, BR-05508090 Sao Paulo, SP - Brazil
[2] Aryabhatta Res Inst Observat Sci ARIES, Naini Tal 263002 - India
Total Affiliations: 2
Document type: Journal article
Source: Monthly Notices of the Royal Astronomical Society; v. 498, n. 4, p. 5424-5436, NOV 2020.
Web of Science Citations: 0

A supermassive black hole (SMBH) binary in the core of the blazar OJ 287 has been invoked in previous works to explain its observed optical flare quasi-periodicity. Following this picture, we investigate a hadronic origin for the X-ray and gamma-ray counterparts of the November 2015 major optical flare of this source. An impact outflow must result after the lighter SMBH (the secondary) crosses the accretion disc of the heavier one (the primary). We then consider acceleration of cosmic ray (CR) protons in the shock driven by the impact outflow as it expands and collides with the active galactic nucleus (AGN) wind of the primary SMBH. We show that the emission of these CRs can reproduce the X-ray and gamma-ray flare data self-consistently with the optical component of the 2015 November major flare. The derived emission models are consistent with a magnetic field B similar to 5 G in the emission region and a power-law index of q similar to 2.2 for the energy distribution of the emitting CRs. The mechanical luminosity of the AGN wind represents less than or similar to 50 per cent of the mass accretion power of the primary SMBH in all the derived emission profiles. (AU)

FAPESP's process: 13/10559-5 - Investigation of high energy and plasma astrophysics phenomena: theory, numerical simulations, observations, and instrument development for the Cherenkov Telescope Array (CTA)
Grantee:Elisabete Maria de Gouveia Dal Pino
Support type: Research Projects - Thematic Grants
FAPESP's process: 15/13933-0 - Probing relativistic jets and high energy emission through Multi-wavelength observation analysis
Grantee:Pankaj Kushwaha
Support type: Scholarships in Brazil - Post-Doctorate
FAPESP's process: 17/12188-5 - Study of relativistic particles and high energy emissions around black hole and jet sources through MHD, particle-in-cell (PIC) and radiative transfer
Grantee:Juan Carlos Rodríguez Ramírez
Support type: Scholarships in Brazil - Post-Doctorate