Very high-energy gamma-ray and neutrino emission from hadronic interaction in compact binary millisecond pulsars

Abstract

Blackwidow and redback systems are millisecond pulsars in compact orbits with ultra-light and low-mass companions, respectively, collectively known as ``spider pulsars". In such systems, an intrabinary shock can form between the pulsar and the companion winds, serving as a site for particle acceleration and associated non-thermal emission. Assuming that protons can be extracted from the neutron star surface and accelerated at the intrabinary shock and/or within the pulsar wind, we model the very high-energy gamma-ray and neutrino emissions ($0.1-10^3$~TeV) produced through interactions with the companion wind and the companion star. We first calculate the high-energy emissions using an optimistic combination of parameters to maximize the gamma-ray and neutrino fluxes. We find that, for energetic spider pulsars with a spin-down power $\gtrsim 10^{35}\mathrm{erg}{\mathrm{s}}^{-1}$ and a magnetic field of $\sim 10^3\mathrm{G}$ in the companion region, the gamma-ray emission could be detectable as point sources by CTA and LHAASO, while the neutrino emission could be detectable by the future TRIDENT detector. Finally, we build a synthetic population of these systems, compute the cumulative neutrino flux expected from spider pulsars, and compare it with the Galactic neutrino diffuse emission measured by IceCube. We find that, under realistic assumptions on the fraction of the spin-down power converted into protons, the contribution of spiders to the diffuse Galactic neutrino flux is negligible.

References in corpus (24)

• Neutron Star Observations: Prognosis for Equation of State Constraints
• The Parkes multibeam pulsar survey: VI. Discovery and timing of 142 pulsars and a Galactic population analysis
• Time-integrated Neutrino Source Searches with 10 years of IceCube Data
• Observation of high-energy neutrinos from the Galactic plane
• The First LHAASO Catalog of Gamma-Ray Sources
• The Third Fermi Large Area Telescope Catalog of Gamma-ray Pulsars
• Measurement of ultra-high-energy diffuse gamma-ray emission of the Galactic plane from 10 TeV to 1 PeV with LHAASO-KM2A
• Optical spectroscopy and demographics of redback millisecond pulsar binaries
• X-ray states of redback millisecond pulsars
• Einstein@Home Discovery of the Gamma-ray Millisecond Pulsar PSR J2039-5617 Confirms Its Predicted Redback Nature
• B-ducted Heating of Black Widow Companions
• Proton acceleration in pulsar magnetospheres
• X-ray Through Very-High-Energy Intrabinary Shock Emission from Black Widows and Redbacks
• The Synchrotron Emission Pattern of IntraBinary Shocks
• Neutron star mass estimates from gamma-ray eclipses in spider millisecond pulsar binaries
• A Deep Chandra X-ray Observatory Study of the Millisecond Pulsar Population in the Globular Cluster Terzan 5
• Cosmic ray positrons from compact binary millisecond pulsars
• XMM-Newton Observes the Intrabinary Shock of PSR J1959+2048
• Orbital Modulation of Gamma Rays from PSR~J2339$-$0533
• Multi-Wavelength Observations Of A New Redback Millisecond Pulsar 4FGL J1910.7-5320
• Gamma-ray Eclipses and Orbital Modulation Transitions in the Candidate Redback 4FGL J1702.7-5655
• Detection prospects of very and ultra high-energy gamma rays from extended sources with ASTRI, CTA, and LHAASO
• Magnetic reconnection at the termination shock in a striped pulsar wind
• COBIPULSE: A Systematic Search for Compact Binary Millisecond Pulsars

Cited by in corpus (1)

• Search for TeV emission from spider millisecond pulsars with HAWC