Investigation of the broadband emission of the gamma-ray binary HESS J0632+057 using an intrabinary shock model
arXiv:2208.01189 · doi:10.3847/1538-4357/ac8663
Abstract
We investigated a wealth of X-ray and gamma-ray spectral energy distribution (SED) and multi-band light curve (LC) data of the gamma-ray binary HESS J0632+057 using a phenomenological intrabinary shock (IBS) model. Our baseline model assumes that the IBS is formed by colliding winds from a putative pulsar and its Be companion, and particles accelerated in the IBS emit broadband radiation via synchrotron (SY) and inverse-Compton upscattering (ICS) processes. Adopting the latest orbital solution and system geometry (Tokayer et al. 2021), we reproduced the global X-ray and TeV LC features, two broad bumps at and , with the SY and ICS model components. We found these TeV LC peaks originate from ICS emission caused by the enhanced seed photon density near periastron and superior conjunction or Doppler-beamed emission of bulk-accelerated particles in the IBS at inferior conjunction. While our IBS model successfully explained most of the observed SED and LC data, we found that phase-resolved SED data in the TeV band require an additional component associated with ICS emission from pre-shock particles (produced by the pulsar wind). This finding indicates a possibility of delineating the IBS emission components and determining the bulk Lorentz factors of the pulsar wind at certain orbital phases.
22 pages, 12 figures. Accepted for publication in ApJ
References in corpus (31)
- Synchrotron Self-Compton Analysis of TeV X-ray Selected BL Lacertae Objects
- Gamma-ray binaries: pulsars in disguise ?
- Gamma-Ray Studies of Blazars: Synchro-Compton Analysis of Flat Spectrum Radio Quasars
- A Dynamical Model for the Evolution of a Pulsar Wind Nebula inside a Non-Radiative Supernova Remnant
- Modeling interaction of relativistic and nonrelativistic winds in binary system PSR 1259-63/SS2883. I.Hydrodynamical limit
- On the formation of TeV radiation in LS 5039
- The gas-to-extinction ratio and the gas distribution in the Galaxy
- Periodic Emission from the Gamma-ray Binary 1FGL J1018.6-5856
- Orbital X-Ray Variability of the Microquasar LS 5039
- Multiwavelength monitoring and X-ray brightening of Be X-ray binary PSR J2032+4127/MT91 213 on its approach to periastron
- A Luminous Gamma-ray Binary in the Large Magellanic Cloud
- Unraveling the high-energy emission components of gamma-ray binaries
- The changing milliarcsecond radio morphology of the gamma-ray binary LS 5039
- Orbital evolution of colliding star and pulsar winds in 2D and 3D; effects of: dimensionality, EoS, resolution, and grid size
- Pulsar wind zone processes in LS 5039
- The Synchrotron Emission Pattern of IntraBinary Shocks
- X-ray Through Very-High-Energy Intrabinary Shock Emission from Black Widows and Redbacks
- High-Energy emissions from the Pulsar/Be binary system PSR J2032+4127/MT91 213
- A global model of particle acceleration at pulsar wind termination shocks
- H.E.S.S. and Fermi-LAT observations of PSR B1259-63/LS 2883 during its 2014 and 2017 periastron passages
- GeV detection of HESS J0632+057
- Modelling the multi-wavelength emissions from PSR B1259-63/LS 2883: the effects of the stellar disc on shock radiations
- Observation of the gamma-ray binary HESS J0632+057 with the H.E.S.S., MAGIC, and VERITAS telescopes
- Probing the nature of the TeV gamma-ray binary HESS J0632+057 by monitoring Be disk variability
- Orbital Modulation of Gamma Rays from PSR~J23390533
- HESS J0632+057: hydrodynamics and nonthermal emission
- Gamma-ray Eclipses and Orbital Modulation Transitions in the Candidate Redback 4FGL J1702.7-5655
- Theoretical overview on high-energy emission in microquasars
- Multi-Wavelength Observation Campaign of the TeV Gamma-Ray Binary HESS J0632+057 with NuSTAR, VERITAS, MDM, and Swift
- GeV emission of gamma-ray binary with pulsar scenario
- X-ray imaging observations of the high-mass gamma-ray binary HESS J0632+057