Revisiting the Chandra Observation on the Region of PSR J1809-1917: Indication of an X-ray Halo and Implication for the Origin of HESS J1809-193
arXiv:2303.14946 · doi:10.3847/1538-4357/acc7a0
Abstract
HESS J1809-193 is an extended TeV -ray source and the origin of its -ray emission remains ambiguous. Pulsar wind nebula (PWN) of PSR J1809-1917 laying inside the extended -ray emission is a possible candidate. Powered by the central pulsar, ultrarelativistic electrons in PWN can produce radio to X-ray emission through synchrotron and -ray emission by inverse Compton (IC) scattering. To check whether this PWN is the counterpart of HESS J1809-193, we analyzed Chandra X-ray radial intensity profile and the spectral index profile of this PWN. We then adopt a one-zone isotropic diffusion model to fit the keV and the TeV data. We find diffuse nonthermal X-ray emission extending beyond PWN, which is likely an X-ray halo radiated by escaping electron/positron pairs from the PWN. A relatively strong magnetic field of G is required to explain the spatial evolution of the X-ray spectrum (i.e., the significant softening of the spectrum with increasing distance from the pulsar), which, however, would suppress the IC radiation of pairs. Our result implies that a hadronic component may be needed to explain HESS J1809-193.
arXiv comment20 pages, 8 figures, accepted by APJ. Comments are welcome
References in corpus (34)
- The chemical composition of the Sun
- The Evolution and Structure of Pulsar Wind Nebulae
- The H.E.S.S. Galactic plane survey
- Absolute measurement of the unresolved cosmic X-ray background in the 0.5-8 keV band with Chandra
- Parametrization of gamma-ray production cross-sections for pp interactions in a broad proton energy range from the kinematic threshold to PeV energies
- Multiple Galactic Sources with Emission Above 56 TeV Detected by HAWC
- 3HWC: The Third HAWC Catalog of Very-High-Energy Gamma-ray Sources
- Peta-electron volt gamma-ray emission from the Crab Nebula
- A radiation transfer model for the Milky-Way: I. Radiation fields and application to High Energy Astrophysics
- Gamma rays from molecular clouds illuminated by cosmic rays escaping from interacting supernova remnants
- Signatures of high energy protons in pulsar winds
- Stochastic Acceleration and Non-Thermal Radiation in Clusters of Galaxies
- Gamma-ray halos around pulsars as the key to understanding cosmic ray transport in the Galaxy
- Exploring particle escape in supernova remnants through gamma rays
- Evidences of low-diffusion bubbles around Galactic pulsars
- Discovery of two candidate pulsar wind nebulae in very-high-energy gamma rays
- Escape from Vela X
- X-ray Evolution of Pulsar Wind Nebulae
- X-ray emission from PSR J1809-1917 and its pulsar wind nebula, possibly associated with the TeV gamma-ray source HESS J1809-193
- Multi-Zone Modeling of The Pulsar Wind Nebula HESS J1825-137
- Constraining the magnetic field in the TeV halo of Geminga with X-ray Observation
- The Physics of Pulsar Halos: Research Progress and Prospect
- HESS J1809193: a halo of escaped electrons around a pulsar wind nebula?
- On the Unusually Large Spatial Extent of the TeV nebula HESS J1825-137: Implication from the Energy-Dependent Morphology
- GeV emission in the region of HESS J1809-193 and HESS J1813-178: is HESS J1809-193 a proton pevatron?
- X-Ray Studies of HESS J1809-193 with Suzaku
- Unveiling the origin of HESS J1809-193
- Chandra Monitoring of the J1809-1917 Pulsar Wind Nebula and Its Field
- The Variable Pulsar Wind Nebula of PSR J1809-1917
- A Comprehensive Study of the Spectral Variation and the Brightness Profile of Young Pulsar Wind Nebulae
- Prospect of Detecting X-Ray Halos Around Middle-Aged Pulsars with eROSITA
- The BIG X-ray tail
- Multiwavelength study of the northeastern outskirts of the extended TeV source HESS J1809-193
- Chandra view of Abell 407: the central compact group of galaxies and the interaction between the radio AGN and the ICM