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The BL Lac PG 1553+113: a supermassive binary black hole candidate

  • A Decade of AGILE
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Abstract

We present updated observations of the blazar PG 1553+113, a bright BL Lac Object that yields quasi-periodic gamma-ray emission every 2.2 years, strongly suggesting the activity of a super-massive binary black hole. Such binary systems are widely held to emit low-frequency gravitational waves. Confirming the binary nature of PG 1553+113 is very relevant for upcoming searches of nHz gravitational waves.

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Authors and Affiliations

  1. Unitat de Física de les Radiacions, Departament de Física and CERES-IEEC, Universitat Autònoma de Barcelona, 08193, Bellaterra, Spain

    Pere Munar-Adrover

  2. INAF/IAPS–Roma, via del Fosso del Cavaliere 100, 00133, Rome, Italy

    Marco Tavani, Alfonso Cavaliere & Andrea Argan

  3. Astronomia, Accademia Nazionale dei Lincei, via della Lungara 10, 00165, Rome, Italy

    Marco Tavani

  4. Dipartimento di Fisica, Universitá “Tor Vergata”, via della Ricerca Scientifica 1, 00133, Rome, Italy

    Marco Tavani

  5. Gran Sasso Science Institute, viale Francesco Crispi 7, 67100, L’Aquila, Italy

    Marco Tavani

Authors
  1. Pere Munar-Adrover
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  2. Marco Tavani
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  3. Alfonso Cavaliere
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  4. Andrea Argan
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Corresponding author

Correspondence to Pere Munar-Adrover.

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The authors of this article confirm that the present manuscript follows the ethical responsibilities for authors stated by the journal. The authors also confirm that there are no conflicts of interest of any kind regarding the present manuscript.

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This paper is the peer-reviewed version of a contribution selected among those presented at the Conference on Gamma-Ray Astrophysics with the AGILE Satellite held at Accademia Nazionale dei Lincei and Agenzia Spaziale Italiana, Rome on December 11-13, 2017.

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Munar-Adrover, P., Tavani, M., Cavaliere, A. et al. The BL Lac PG 1553+113: a supermassive binary black hole candidate. Rend. Fis. Acc. Lincei 30 (Suppl 1), 145–148 (2019). https://doi.org/10.1007/s12210-019-00816-6

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  • DOI: https://doi.org/10.1007/s12210-019-00816-6

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