$p\gamma$ interactions in Galactic jets as a plausible origin of the positron excess

Abstract

The positron flux measured near Earth shows a rise with energy beyond 30 GeV. We show that this rise may be compatible with the production of positrons in $p\gamma$ interactions in the jets of microquasars.

5 pages, 1 figure, to be published in MNRAS

References in corpus (10)

• Energy spectra of gamma-rays, electrons and neutrinos produced at interactions of relativistic protons with low energy radiation
• Interpretation of AMS-02 electrons and positrons data
• Baryons in the relativistic jets of the stellar-mass black hole candidate 4U 1630-47
• AMS-02 data confronts acceleration of cosmic ray secondaries in nearby sources
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• Constraining the origin of the rising cosmic ray positron fraction with the boron-to-carbon ratio
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• Low-mass X-ray binaries in the bulge of the Milky Way
• The 2005 outburst of the halo black hole X-ray transient XTE J1118+480

Cited by in corpus (12)

• Extended gamma-ray sources around pulsars constrain the origin of the positron flux at Earth
• The Phase II Murchison Widefield Array: Design Overview
• Gamma-ray halos around pulsars as the key to understanding cosmic ray transport in the Galaxy
• Cosmic-ray positrons from millisecond pulsars
• GeV observations of the extended pulsar wind nebulae constrain the pulsar interpretations of the cosmic-ray positron excess
• Positrons from Primordial Black Hole Microquasars and Gamma-ray Bursts
• Undiscovered pulsar in the Local Bubble as an explanation of the local high energy cosmic ray all-electron spectrum
• Effect of the diffusion parameters on the observed gamma-ray spectrum of sources and their contribution to the local all-electron spectrum: the EDGE code
• Positron Excess from Cosmic Ray Interactions in Galactic Molecular Clouds
• Origin of Cosmic Ray Electrons and Positrons
• The Contribution of Millisecond Pulsars to the Galactic Cosmic-Ray Lepton Spectrum
• EDGE: a code to calculate diffusion of cosmic-ray electrons and their gamma-ray emission