Hot spots in the neutrino flux created by cosmic rays from Cygnus and Vela?

Abstract

An analysis of 7.5 years of data in the high-energy starting event sample has been recently published by the IceCube collaboration. The hottest spot in a search for neutrino sources was found far above the Galactic plane and is thus, at first sight, difficult to reconcile with a Galactic origin. In this work, we calculate the cosmic ray (CR) density around nearby, young supernova remnants assuming anisotropic diffusion. Combining the obtained CR densities with the matter distribution deduced from extinction maps, we find two prominent hot spots: The one close to the most significant point in the IceCube search for point sources is created by CRs from the Cygnus loop and has an intensity corresponding to two to four neutrino events. Another, more extended one may be caused by CRs from Vela if CR trajectories are sufficiently disturbed by the magnetic field in the shell around the superbubble Loop I.

arXiv commentv2: 9 pages, 6 figures, extended version, added discussion of a possible extended hot region at low b connected to Vela; to appear in PRD

References in corpus (46)

• A 3D Dust Map Based on Gaia, Pan-STARRS 1 and 2MASS
• Observation of High-Energy Astrophysical Neutrinos in Three Years of IceCube Data
• A New Model of the Galactic Magnetic Field
• Particle Physics with High Energy Neutrinos
• Observation and Characterization of a Cosmic Muon Neutrino Flux from the Northern Hemisphere using six years of IceCube data
• The Optical to Mid-Infrared Extinction Law Based on the APOGEE, Gaia DR2, Pan-STARRS1, SDSS, APASS, 2MASS and WISE Surveys
• The IceCube high-energy starting event sample: Description and flux characterization with 7.5 years of data
• Ultra-high energy cosmic rays without GZK cutoff
• Testing the Hadronuclear Origin of PeV Neutrinos Observed with IceCube
• On the mass-to-light ratio of the local Galactic disc and the optical luminosity of the Galaxy
• The Galactic Magnetic Field
• Particle Physics from Stars
• The Fermi Bubbles: Giant, Multi-Billion-Year-Old Reservoirs of Galactic Center Cosmic Rays
• First Detection of sub-PeV Diffuse Gamma Rays from the Galactic Disk: Evidence for Ubiquitous Galactic Cosmic Rays beyond PeV Energies
• 3D maps of interstellar dust in the Local Arm: using $Gaia$, 2MASS and APOGEE-DR14
• Neutrinos at IceCube from Heavy Decaying Dark Matter
• The gamma-ray and neutrino sky: A consistent picture of Fermi-LAT, Milagro, and IceCube results
• Resolving nearby dust clouds
• Are IceCube neutrinos unveiling PeV-scale decaying dark matter?
• Constraints on Galactic Neutrino Emission with Seven Years of IceCube Data
• Probing X-ray Absorption and Optical Extinction in the Interstellar Medium Using Chandra Observations of Supernova Remnants
• Restricting UHECRs and cosmogenic neutrinos with Fermi-LAT
• A Galactic Halo Origin of the Neutrinos Detected by IceCube
• HAWC observations of the acceleration of very-high-energy cosmic rays in the Cygnus Cocoon
• The Galactic magnetic field and propagation of ultra-high energy cosmic rays
• Cosmic Ray Anisotropy as Signature for the Transition from Galactic to Extragalactic Cosmic Rays
• Hydrodynamic Simulation of Supernova Remnants Including Efficient Particle Acceleration
• Reconciling cosmic ray diffusion with Galactic magnetic field models
• How precisely neutrino emission from supernova remnants can be constrained by gamma ray observations?
• Charting nearby dust clouds using Gaia data only
• Cosmic Ray Models
• Escape model for Galactic cosmic rays and an early extragalactic transition
• AAfrag: Interpolation routines for Monte Carlo results on secondary production in proton-proton, proton-nucleus and nucleus-nucleus interactions
• Ultrahigh Energy Nuclei in the Turbulent Galactic Magnetic Field
• Neutrino yield from Galactic cosmic rays
• Explaining the Spectra of Cosmic Ray Groups above the Knee by Escape from the Galaxy
• Filamentary Diffusion of Cosmic Rays on Small Scales
• Anisotropic Cosmic Ray Diffusion and its Implications for Gamma-Ray Astronomy
• Observation of photons above 300 TeV associated with a high-energy neutrino from the Cygnus region
• Escape of cosmic rays from the Galaxy and effects on the circumgalactic medium
• High Energy Neutrinos from the Fermi Bubbles
• Vela as the Source of Galactic Cosmic Rays above 100 TeV
• LHAASO sensitivity for diffuse gamma-ray signals from the Galaxy
• Pion decay model of TIBET-AS$\gamma$ PeV gamma-ray signal
• High-energy neutrinos from cosmic ray interactions in the Local Bubble
• High-energy neutrinos from Galactic superbubbles

Cited by in corpus (1)

• Constraining the position of the knee in the galactic cosmic ray spectrum with ultra-high-energy diffuse $\gamma$-rays