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The one about Blazar OJ 287

20 Apr 2021, 16:11 UTC
The one about Blazar OJ 287
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Title: Explaining temporal variations in the jet PA of the blazar OJ 287 using its BBH central engine modelAuthors: Lankeswar Dey, Mauri J. Valtonen, A. Gopakumar, Rocco Lico, José L. Gómez, Abhimanyu Susobhanan, S. Komossa, and Pauli PihajokiFirst author’s institution: Department of Astronomy and Astrophysics, Tata Institute of Fundamental Research, Mumbai 400005, IndiaJournal: Submitted to MNRAS, pre-print available on the arXivA blazar is a special type of active galactic nucleus (AGN) that has a relativistic jet pointing toward Earth. As described in our “Guide to Classification of Galaxies & AGN,” an AGN is a supermassive black hole (SMBH) that has a superheated accretion disc around it. AGN are always found in the centers of galaxies and account for most of the extragalactic gamma ray sources. AGN will usually have a relativistic jet, but the observed properties of the AGN are very dependent on which way this jet is pointing. When the jet is pointing toward Earth (or toward the observer, as it’s sometimes written), we call this AGN a blazar. The direct cause of this jet is, of yet, unknown, but there are many theories – including one where the center of the AGN is actually a binary black hole ...

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