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Accretion Disk Parameters Determined from the Great 2015 Flare of OJ 287

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F19%3A00517161" target="_blank" >RIV/67985815:_____/19:00517161 - isvavai.cz</a>

  • Result on the web

    <a href="https://doi.org/10.3847/1538-4357/ab3573" target="_blank" >https://doi.org/10.3847/1538-4357/ab3573</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.3847/1538-4357/ab3573" target="_blank" >10.3847/1538-4357/ab3573</a>

Alternative languages

  • Result language

    angličtina

  • Original language name

    Accretion Disk Parameters Determined from the Great 2015 Flare of OJ 287

  • Original language description

    In the binary black hole model of OJ. 287, the secondary black hole orbits a much more massive primary, and impacts on the primary accretion disk at predictable times. We update the parameters of the disk, the viscosity, alpha, and the mass accretion rate, <(m)over dot>. We find alpha = 0.26 +/- 0.1 and <(m)over dot> = 0.08 +/- 0.04 in Eddington units. The former value is consistent with Coroniti, and the latter with Marscher & Jorstad. Predictions are made for the 2019 July 30 superflare in OJ. 287. We expect that it will take place simultaneously at the Spitzer infrared channels, as well as in the optical, and that therefore the timing of the flare in optical can be accurately determined from Spitzer observations. We also discuss in detail the light curve of the 2015 flare, and find that the radiating volume has regions where bremsstrahlung dominates, as well as regions that radiate primarily in synchrotron radiation. The former region produces the unpolarized first flare, while the latter region gives rise to a highly polarized second flare.

  • Czech name

  • Czech description

Classification

  • Type

    J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database

  • CEP classification

  • OECD FORD branch

    10308 - Astronomy (including astrophysics,space science)

Result continuities

  • Project

  • Continuities

    I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Others

  • Publication year

    2019

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data specific for result type

  • Name of the periodical

    Astrophysical Journal

  • ISSN

    1538-4357

  • e-ISSN

  • Volume of the periodical

    882

  • Issue of the periodical within the volume

    2

  • Country of publishing house

    US - UNITED STATES

  • Number of pages

    8

  • Pages from-to

    88

  • UT code for WoS article

    000484725300004

  • EID of the result in the Scopus database

    2-s2.0-85074155684