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  • Kantzas, D.Universiteit Van Amsterdam,University of Amsterdam (author)

A new lepto-hadronic model applied to the first simultaneous multiwavelength data set for Cygnus X-1

  • Article/chapterEnglish2020

Publisher, publication year, extent ...

  • 2020-10-29
  • Oxford University Press (OUP),2020

Numbers

  • LIBRIS-ID:oai:research.chalmers.se:a2fc0ad6-c0ff-4fff-af01-af0b0d3a31be
  • https://doi.org/10.1093/mnras/staa3349DOI
  • https://research.chalmers.se/publication/521108URI

Supplementary language notes

  • Language:English
  • Summary in:English

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  • Subject category:art swepub-publicationtype
  • Subject category:ref swepub-contenttype

Notes

  • Cygnus X-1 is the first Galactic source confirmed to host an accreting black hole. It has been detected across the entire electromagnetic spectrum from radio to GeV gamma-rays. The source's radio through mid-infrared radiation is thought to originate from the relativistic jets. The observed high degree of linear polarization in the MeV X-rays suggests that the relativistic jets dominate in this regime as well, whereas a hot accretion flow dominates the soft X-ray band. The origin of the GeV non-thermal emission is still debated, with both leptonic and hadronic scenarios deemed to be viable. In this work, we present results from a new semi-analytical, multizone jet model applied to the broad-band spectral energy distribution of Cygnus X-1 for both leptonic and hadronic scenarios. We try to break this degeneracy by fitting the first-ever high-quality, simultaneous multiwavelength data set obtained from the CHOCBOX campaign (Cygnus X-1 Hard state Observations of a Complete Binary Orbit in X-rays). Our model parametrizes dynamical properties, such as the jet velocity profile, the magnetic field, and the energy density. Moreover, the model combines these dynamical properties with a self-consistent radiative transfer calculation including secondary cascades, both of leptonic and hadronic origin. We conclude that sensitive TeV gamma-ray telescopes like Cherenkov Telescope Array (CTA) will definitively answer the question of whether hadronic processes occur inside the relativistic jets of Cygnus X-1.

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Added entries (persons, corporate bodies, meetings, titles ...)

  • Markoff, S.Universiteit Van Amsterdam,University of Amsterdam (author)
  • Beuchert, T.Universiteit Van Amsterdam,University of Amsterdam,European Southern Observatory (ESO) (author)
  • Lucchini, M.Universiteit Van Amsterdam,University of Amsterdam (author)
  • Chhotray, A.Universiteit Van Amsterdam,University of Amsterdam (author)
  • Ceccobello, Chiara,1984Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)chiarac (author)
  • Tetarenko, Alexandra J.East Asian Observatory (author)
  • Miller-Jones, J. C. A.Curtin University (author)
  • Bremer, M.Institut de Radioastronomie Millimétrique (IRAM) (author)
  • Garcia, J. A.California Institute of Technology (Caltech) (author)
  • Grinberg, V.Eberhard Karls Universität Tübingen,Eberhard Karls University of Tübingen (author)
  • Uttley, P.Universiteit Van Amsterdam,University of Amsterdam (author)
  • Wilms, J. (author)
  • Universiteit Van AmsterdamEuropean Southern Observatory (ESO) (creator_code:org_t)

Related titles

  • In:Monthly Notices of the Royal Astronomical Society: Oxford University Press (OUP)500:2, s. 2112-21260035-87111365-2966

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