The Unanticipated Phenomenology of the Blazar PKS 2131-021: A Unique Supermassive Black Hole Binary Candidate

Autor:	S. O’Neill, S. Kiehlmann, A. C. S. Readhead, M. F. Aller, R. D. Blandford, I. Liodakis, M. L. Lister, P. Mróz, C. P. O’Dea, T. J. Pearson, V. Ravi, M. Vallisneri, K. A. Cleary, M. J. Graham, K. J. B. Grainge, M. W. Hodges, T. Hovatta, A. Lähteenmäki, J. W. Lamb, T. J. W. Lazio, W. Max-Moerbeck, V. Pavlidou, T. A. Prince, R. A. Reeves, M. Tornikoski, P. Vergara de la Parra, J. A. Zensus
Přispěvatelé:	California Institute of Technology, University of Crete, University of Michigan, Ann Arbor, Stanford University, University of Turku, Purdue University, University of Warsaw, University of Manitoba, Jet Propulsion Laboratory, University of Manchester, Metsähovi Radio Observatory, Department of Electronics and Nanoengineering, Universidad de Chile, Universidad de Concepción, Max Planck Institute for Radio Astronomy, Aalto-yliopisto, Aalto University
Jazyk:	angličtina
Rok vydání:	2022
Předmět:	High Energy Astrophysical Phenomena (astro-ph.HE) Space and Planetary Science Astrophysics::High Energy Astrophysical Phenomena FOS: Physical sciences Astronomy and Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics Astrophysics - High Energy Astrophysical Phenomena
Zdroj:	O’neill, S, Kiehlmann, S, Readhead, A C S, Aller, M F, Blandford, R D, Liodakis, I, Lister, M L, Mróz, P, O’dea, C P, Pearson, T J, Ravi, V, Vallisneri, M, Cleary, K A, Graham, M J, Grainge, K J B, Hodges, M W, Hovatta, T, Lähteenmäki, A, Lamb, J W, Lazio, T J W, Max-moerbeck, W, Pavlidou, V, Prince, T A, Reeves, R A, Tornikoski, M, Vergara De La Parra, P & Zensus, J A 2022, ' The Unanticipated Phenomenology of the Blazar PKS 2131–021: A Unique Supermassive Black Hole Binary Candidate ', The Astrophysical Journal Letters, vol. 926, no. 2, pp. L35 . https://doi.org/10.3847/2041-8213/ac504b
DOI:	10.3847/2041-8213/ac504b
Popis:	Most large galaxies host supermassive black holes in their nuclei and are subject to mergers, which can produce a supermassive black hole binary (SMBHB), and hence periodic signatures due to orbital motion. We report unique periodic radio flux density variations in the blazar PKS~2131$-$021, which strongly suggest an SMBHB with an orbital separation of $\sim 0.001-0.01$ pc. Our 45.1-year radio light curve shows two epochs of strong sinusoidal variation with the same period and phase to within $ Comment: 24 pages, 13 figure, 3 Tables, accepted for publication in APJL
Databáze:	OpenAIRE
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