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The relation between optical and γ-ray emission in BL Lac sources

La Mura, G ; Becerra Gonzalez, J ; Chiaro, G ; Ciroi, S ; Otero-Santos, J

Monthly notices of the Royal Astronomical Society, 2022-08, Vol.515 (4), p.4810-4827 [Periódico revisado por pares]

United Kingdom: Oxford University Press

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  • Título:
    The relation between optical and γ-ray emission in BL Lac sources
  • Autor: La Mura, G ; Becerra Gonzalez, J ; Chiaro, G ; Ciroi, S ; Otero-Santos, J
  • É parte de: Monthly notices of the Royal Astronomical Society, 2022-08, Vol.515 (4), p.4810-4827
  • Notas: USDOE Office of Nuclear Energy (NE), Nuclear Fuel Cycle and Supply Chain
  • Descrição: ABSTRACT The relativistic jets produced by some Active Galactic Nuclei (AGNs) are among the most efficient persistent sources of non-thermal radiation and represent an ideal laboratory for studying high-energy interactions. In particular, when the relativistic jet propagates along the observer’s line of sight, the beaming effect produces dominant signatures in the observed spectral energy distribution (SED), from the radio domain up to the highest energies, with the further possibility of resulting in radiation-particle multimessenger associations. In this work, we investigate the relationships between the emission of γ rays and the optical spectra of a sample of AGN, selected from BL Lac sources detected by the Fermi Large Area Telescope (Fermi-LAT). We find that there is a close relationship between the optical and γ-ray spectral indices. Despite all the limitations due to the non-simultaneity of the data, this observation strongly supports a substantial role of Synchrotron-Self Compton (SSC) radiation in a single zone leptonic scenario for most sources. This result simplifies the application of theoretical models to explore the physical parameters of the jets in this type of sources.
  • Editor: United Kingdom: Oxford University Press
  • Idioma: Inglês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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