Understanding the multiwavelength observation of Geminga's TeV halo: the role of anisotropic diffusion of particles

Abstract

In this letter we propose that the X-ray and the TeV observations in the vicinity of Geminga can be understood in the framework of anisotropic diffusion of injected electrons/positrons. This interpretation only requires the turbulence in the vicinity of Geminga to be sub-Alfvénic with the local mean magnetic field direction approximately aligned with our line of sight towards Geminga, without invoking extreme conditions for the environment, such as an extremely small diffusion coefficient and a weak magnetic field of strength $<1\mu$G as suggested in previous literature.

arXiv comment7 pages, 4 figures, including Supplemental Material, PRL accepted

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Cited by in corpus (50)

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• Self-Generated Cosmic-Ray Turbulence Can Explain the Morphology of TeV Halos
• 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
• Insights from LHAASO and IceCube into the origin of the Galactic diffuse TeV--PeV emission
• The Physics of Pulsar Halos: Research Progress and Prospect
• Cosmic ray Transport in Magnetohydrodynamic turbulence
• Reanalyze the pulsar scenario to explain the cosmic positron excess considering the recent developments
• Anisotropic diffusion cannot explain TeV halo observations
• On the Unusually Large Spatial Extent of the TeV nebula HESS J1825-137: Implication from the Energy-Dependent Morphology
• TeV halos and the role of pulsar wind nebulae as sources of cosmic ray positrons
• Diffuse Ultra-High-Energy Gamma-Ray Emission From TeV Halos
• Ultra-High-Energy Gamma-Ray Astronomy
• Morphology of Gamma-Ray Halos around Middle-Aged Pulsars: Influence of the Pulsar Proper Motion
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• A Three-component Model for Cosmic-ray Spectrum and Dipole Anisotropy
• Diagnosis of 3D magnetic field and modes composition in MHD turbulence with Y-parameter
• Gamma-ray halos around pulsars: impact on pulsar wind physics and galactic cosmic ray transport
• Test of the superdiffusion model in the interstellar medium around the Geminga pulsar
• On the surface brightness radial profile of the extended $\gamma$-ray sources
• Prospect of detecting TeV halos with LHAASO: in the framework of the anisotropic diffusion model
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• Features of the gamma-ray pulsar halo HESS J1831$-$098
• Constraining the slow-diffusion zone size and electron injection spectral index for the Geminga pulsar halo
• Dissecting the emission from LHAASO J0341+5258: implications for future multi-wavelength observations
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• Prospect of Detecting X-Ray Halos Around Middle-Aged Pulsars with eROSITA
• Constraints on the $e^{\pm }$ Pair Injection of Pulsar Halos: Implications from the Galactic Diffuse Multi-TeV Gamma-ray Emission
• Mirages and Large TeV Halo-Pulsar Offsets from Cosmic Ray Propagation
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• Extended TeV Halos May Commonly Exist around Middle-Aged Pulsars
• The environment of TeV halo progenitors
• Diagnostics of magnetohydrodynamic modes in the ISM through synchrotron polarization statistics
• Ultra-high-energy $\gamma$-ray emission associated with the tail of a bow-shock pulsar wind nebula
• PHECT: A lightweight computation tool for pulsar halo emission
• Mirage Sources and Large TeV Halo-Pulsar Offsets: Exploring the Parameter Space
• Investigating the mysterious nature of 1LHAASO J1740+0948u through deep XMM-Newton observations
• Diagnosing Interstellar Magnetic Turbulence with TeV Pulsar Halos
• Possible evidence for extended X-ray emission surrounding PSR B0656+14 with eROSITA
• Method for testing diffusive shock acceleration and diffusion propagation of 1-100 TeV cosmic electrons with multiwavelength observations of the Geminga halo and pulsar wind nebula
• Self-confinement of relativistic pair beams in magnetized interstellar plasmas: the case of pulsar X-ray filaments
• Influence of interstellar environment near the solar system on cosmic-ray spectra and dipole anisotropy
• Magnetohydrodynamic turbulence and propagation of cosmic rays: theory confronted with observations
• Investigating the emission signatures of pulsar halo candidate HESS J1813-126
• Anisotropic Diffusion in Pulsar Halos: Interpreting the asymmetric morphology of Geminga and Monogem halos measured by HAWC