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Multi-messenger signature of cosmic rays from the microquasar V4641 Sgr propagating along a Galactic Magnetic Field line

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arxiv 2410.17608 v1 pith:6MRXUB7M submitted 2024-10-23 astro-ph.HE

Andrii Neronov , Foteini Oikonomou , Dmitri Semikoz This is my paper · ORCID
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keywords fieldgamma-raygalactichigh-energymagneticmicroquasaralongcosmic
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The recently detected extended, very-high-energy gamma-ray emission from the microquasar V4641 Sgr reveals a puzzling 200-parsec-long jet-like structure significantly misaligned with its radio jet. We propose that this gamma-ray structure is produced by high-energy cosmic-ray particles escaping from the microquasar along ordered field lines of the Galactic Magnetic Field and interacting with the interstellar medium. We show that if the gamma-ray emission is produced by interactions of high-energy cosmic ray nuclei, the system is detectable by future multi-km3 neutrino detectors. We argue that gamma-ray observations of jet-like features adjacent to high-energy sources in the Milky Way provide a new method to measure the regular and turbulent components of the Galactic magnetic field at different locations in the Milky Way.

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  1. Galactic Science -- Rapporteur Talk of the 8th Heidelberg International Symposium on High Energy Gamma Ray Astronomy

    astro-ph.HE 2025-06 unverdicted

    This is a review of the Galactic science highlights from the Gamma-2024 conference, covering new gamma-ray observations of pulsars, microquasars, novae, and other Milky Way sources.

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