A new lepto-hadronic model applied to the first simultaneous multiwavelength data set for Cygnus X-1
Kantzas D, Markoff S, Beuchert T, Lucchini M, Chhotray A, Ceccobello C, Tetarenko AJ, Miller-Jones JCA, Bremer M, Garcia JA, Grinberg , Uttley P, Wilms J (2021)
Publication Type: Journal article
Publication year: 2021
Journal
Book Volume: 500
Pages Range: 2112-2126
Journal Issue: 2
Abstract
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.
Authors with CRIS profile
Involved external institutions
University of Amsterdam
Netherlands (NL)
Chalmers University of Technology / Chalmers tekniska högskola
Sweden (SE)
East Asian Observatory (EAO)
United States (USA) (US)
Curtin University
Australia (AU)
IRAM : Institut de Radioastronomie Millimétrique
France (FR)
California Institute of Technology (Caltech)
United States (USA) (US)
Eberhard Karls Universität Tübingen
Germany (DE)
Netherlands (NL)
Chalmers University of Technology / Chalmers tekniska högskola
Sweden (SE)
East Asian Observatory (EAO)
United States (USA) (US)
Curtin University
Australia (AU)
IRAM : Institut de Radioastronomie Millimétrique
France (FR)
California Institute of Technology (Caltech)
United States (USA) (US)
Eberhard Karls Universität Tübingen
Germany (DE)
How to cite
APA:
Kantzas, D., Markoff, S., Beuchert, T., Lucchini, M., Chhotray, A., Ceccobello, C.,... Wilms, J. (2021). A new lepto-hadronic model applied to the first simultaneous multiwavelength data set for Cygnus X-1. Monthly Notices of the Royal Astronomical Society, 500(2), 2112-2126. https://dx.doi.org/10.1093/mnras/staa3349
MLA:
Kantzas, Dimitrios, et al. "A new lepto-hadronic model applied to the first simultaneous multiwavelength data set for Cygnus X-1." Monthly Notices of the Royal Astronomical Society 500.2 (2021): 2112-2126.
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