Investigating $\gamma$-ray halos around three HAWC bright sources in Fermi-LAT data

Abstract

Numerous extended sources around Galactic pulsars have shown significant $\gamma$-ray emission from GeV to TeV energies, revealing hundreds of TeV energy electrons scattering off of the underlying photon fields through inverse Compton scattering (ICS). HAWC TeV gamma-ray observations of few-degree extended emission around the pulsars Geminga and Monogem, and LAT GeV emission around Geminga, suggest that systems older than 100 kyr have multi-TeV $e^{\pm }$ propagating beyond the SNR-PWN system into the interstellar medium. Following the discovery of few $\gamma$-ray sources by HAWC at energies E$>100$~TeV, we investigate the presence of an extended $\gamma$-ray emission in Fermi-LAT data around the three brightest sources detected by HAWC up to 100 TeV. We find an extended emission of ${\theta }_{68}=1.00_{-0.07}^{+0.05}$ deg around eHWC J1825-134 and ${\theta }_{68}=0.71\pm 0.10$ deg eHWC J1907+063. The analysis with ICS templates on Fermi-LAT data point to diffusion coefficient values which are significantly lower than the average Galactic one. When studied along with HAWC data, the $\gamma$-ray Fermi-LAT data provide invaluable insight into the very high-energy electron and positron parent populations.

arXiv comment18 pages and 11 figures. Phys.Rev.D 104 (2021) 10, 103002

References in corpus (55)

• The ATNF Pulsar Catalogue
• The ATNF Pulsar Catalogue
• Fermi Large Area Telescope Fourth Source Catalog
• A New Electron Density Model for Estimation of Pulsar and FRB Distances
• The Evolution and Structure of Pulsar Wind Nebulae
• Extended gamma-ray sources around pulsars constrain the origin of the positron flux at Earth
• The Fermi Galactic Center GeV Excess and Implications for Dark Matter
• TeV Gamma Rays from Geminga and the Origin of the GeV Positron Excess
• The 2HWC HAWC Observatory Gamma Ray Catalog
• Teraelectronvolt Astronomy
• The 1st Fermi Lat Supernova Remnant Catalog
• Multiple Galactic Sources with Emission Above 56 TeV Detected by HAWC
• Discovery of TeV Gamma-Ray Emission from the Cygnus Region of the Galaxy
• Energy dependent gamma-ray morphology in the Pulsar wind nebula HESSJ1825-137
• Galactic electrons and positrons at the Earth:new estimate of the primary and secondary fluxes
• Inverse Compton Emission from Galactic Supernova Remnants: Effect of the Interstellar Radiation Field
• The population of TeV pulsar wind nebulae in the H.E.S.S. Galactic Plane Survey
• Interpretation of AMS-02 electrons and positrons data
• Absorption of Very High Energy Gamma Rays in the Milky Way
• Using HAWC to Discover Invisible Pulsars
• On the TeV Halo Fraction in gamma-ray bright Pulsar Wind Nebulae
• Search for extended sources in the Galactic Plane using 6 years of Fermi-Large Area Telescope Pass 8 data above 10 GeV
• Detection of a $\gamma$-ray halo around Geminga with the Fermi-LAT and implications for the positron flux
• Cosmic-ray transport from AMS-02 B/C data: benchmark models and interpretation
• Pulsar wind nebulae with bow shocks: non-thermal radiation and cosmic ray leptons
• TeV Halos are Everywhere: Prospects for New Discoveries
• Fermi-LAT improved Pass~8 event selection
• Search for steady point-like sources in the astrophysical muon neutrino flux with 8 years of IceCube data
• A Sino-German lambda6 cm polarization survey of the Galactic plane I. Survey strategy and results for the first survey region
• Particle Transport within the Pulsar Wind Nebula HESS J1825-137
• PSR J1907+0602: A Radio-Faint Gamma-Ray Pulsar Powering a Bright TeV Pulsar Wind Nebula
• XMM-Newton observations of PSR B1823-13: An asymmetric synchrotron nebula around a Vela-like pulsar
• A possible association of the new VHE gamma-ray source HESS J1825--137 with the pulsar wind nebula G18.0--0.7
• AMS-02 Antiprotons Reloaded
• Positron flux and gamma-ray emission from Geminga pulsar and pulsar wind nebula
• Cosmic ray production in supernovae
• Contribution of pulsars to cosmic-ray positrons in light of recent observation of inverse-Compton halos
• Evidences of low-diffusion bubbles around Galactic pulsars
• The cosmic-ray and gas content of the Cygnus region as measured in gamma rays by the Fermi Large Area Telescope
• A Very High Energy $\gamma$-Ray Survey towards the Cygnus Region of the Galaxy
• Chandra Observation of PSR B1823-13 and its Pulsar Wind Nebula
• Detection of the Pulsar Wind Nebula HESS J1825-137 with the Fermi Large Area Telescope
• Pulsed Gamma-rays from PSR J2021+3651 with the Fermi Large Area Telescope
• Dipole anisotropy in cosmic electrons and positrons: inspection on local sources
• Energy dependent morphology of the pulsar wind nebula HESS J1825-137 with Fermi-LAT
• Investigating the TeV Morphology of MGRO J1908+06 with VERITAS
• Suzaku Observation of HESS J1825-137: Discovery of Largely-Extended X-rays near from PSR J1826-1334
• Rings and Jets around PSR J2021+3651: the `Dragonfly Nebula'
• Ultra-high energy Inverse Compton emission from Galactic electron accelerators
• Hadronic vs leptonic models for $\gamma$-ray emission from VER J2227+608
• Investigating the nature of MGRO J1908+06 with multiwavelength observations
• On the anomalously large extension of the Pulsar Wind Nebula HESS J1825-137
• Radio study of the extended TeV source VER J1907+062
• On the Unusually Large Spatial Extent of the TeV nebula HESS J1825-137: Implication from the Energy-Dependent Morphology
• Investigating the multiband nonthermal emission of the 100 TeV source eHWC J2019$+$368 with a pulsar wind nebula scenario

Cited by in corpus (13)

• The Third Fermi Large Area Telescope Catalog of Gamma-ray Pulsars
• Does the Geminga, Monogem and PSR J0622+3749 $\gamma$-ray halos imply slow diffusion around pulsars?
• The Highest Energy HAWC Sources are Likely Leptonic and Powered by Pulsars
• Evidence of TeV Halos Around Millisecond Pulsars
• Constraining positron emission from pulsar populations with AMS-02 data
• Where are Milky Way's Hadronic PeVatrons?
• A pulsar wind nebula origin of the LHAASO-detected UHE gamma-ray sources
• Geminga's pulsar halo: an X-ray view
• Gamma-ray halos around pulsars: impact on pulsar wind physics and galactic cosmic ray transport
• Disclosing the catalog pulsars dominating the Galactic positron flux
• New estimate for the contribution of the Geminga pulsar to the positron excess
• Unraveling the Nature of HAWC J1844-034 with Fermi-LAT Data Analysis and Multi-wavelength Modeling
• Investigating the emission signatures of pulsar halo candidate HESS J1813-126