Promise of persistent multi-messenger astronomy with the Blazar OJ 287

doi:10.3390/galaxies10010001

Promise of persistent multi-messenger astronomy with the Blazar OJ 287

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Promise of persistent multi-messenger astronomy with the Blazar OJ 287

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punktacja MEiN [2021]: 20

title:	Promise of persistent multi-messenger astronomy with the Blazar OJ 287
author:	Valtonen Mauri J., Dey Lankeswar, Gopakumar Achamveedu, Zoła Stanisław , Komossa S., Pursimo Tapio, Gomez Jose L., Hudec Rene, Jermak Helen, Berdyugin Andrei V.
journal title:	Galaxies
volume:	10
issue:	1
date of publication :	2021
article ID:	1
eISSN:	2075-4434
DOI:	10.3390/galaxies10010001
language:	English
journal language:	English
abstract in English:	Successful observations of the seven predicted bremsstrahlung flares from the unique bright blazar OJ 287 firmly point to the presence of a nanohertz gravitational wave (GW) emitting supermassive black hole (SMBH) binary central engine. We present arguments for the continued monitoring of the source in several electromagnetic windows to firmly establish various details of the SMBH binary central engine description for OJ 287. In this article, we explore what more can be known about this system, particularly with regard to accretion and outflows from its two accretion disks. We mainly concentrate on the expected impact of the secondary black hole on the disk of the primary on 3 December 2021 and the resulting electromagnetic signals in the following years. We also predict the times of exceptional fades, and outline their usefulness in the study of the host galaxy. A spectral survey has been carried out, and spectral lines from the secondary were searched for but were not found. The jet of the secondary has been studied and proposals to discover it in future VLBI observations are mentioned. In conclusion, the binary black hole model explains a large number of observations of different kinds in OJ 287. Carefully timed future observations will be able to provide further details of its central engine. Such multi-wavelength and multidisciplinary efforts will be required to pursue multi-messenger nanohertz GW astronomy with OJ 287 in the coming decades.
keywords in English:	BL lacertae objects, OJ 287, supermassive black holes, accretion discs, gravitational waves, jets
affiliation:	Wydział Fizyki, Astronomii i Informatyki Stosowanej : Instytut – Obserwatorium Astronomiczne
type:	journal article
subtype:	academic paper