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Impact of Parameters in the Blazar Jet Magnetic Field Model on Axion-Like Particle Constraints
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abstract
The interaction between axion-like particles (ALPs) and photons induces ALP-photon oscillations in astrophysical magnetic fields, leading to spectral distortions in the $\gamma$-ray spectrum of blazars. The primary uncertainty of this phenomenon may originate from the magnetic field within the jet of the blazar. While many studies have explored the effects of ALP-photon oscillations using typical values for jet magnetic field parameters, it is important to recognize that these parameters can be constrained by multi-wavelength observations. In this study, we utilize the high energy $\gamma$-ray spectrum of Mrk 421 obtained from MAGIC and Fermi-LAT observations. By employing multi-wavelength fitting with a one-zone synchrotron self-Compton model, we derive the parameters characterizing the magnetic field model within the jet, and investigate their impacts on the ALP constraints.
Forward citations
Cited by 2 Pith papers
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Exploring Constraints on Axion-like Particles with the Observations for blazar Mrk 501
The ALP parameter constraints derived from Mrk 501 gamma-ray spectra vary by orders of magnitude depending on whether the jet emission is leptonic or hadronic and on the jet magnetic field geometry.
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An attempt to study axion-photon coupling using compact binary systems with high Shapiro time delay
High-Shapiro-delay pulsar binaries could probe axion-photon conversion in the companion's magnetic field, but for the two systems studied the projected limits are weaker than current constraints.
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