Inverse Compton Scenarios for the TeV Gamma-Ray Emission of the Galactic Centre

Abstract

The intense Compton cooling of ultra-relativistic electrons in the Klein-Nishina regime in radiation dominated environments, such as that found in the Galactic Centre, may result in radically different electron spectra than those produced by Synchrotron cooling. We explore these effects and their impact on the X-ray and gamma-ray spectra produced in electron accelerators in this region in comparison to elsewhere in our galaxy. We discuss the broad-band emission expected from the newly discovered pulsar wind nebula G 359.95-0.04 and the possible relationship of this X-ray source to the central TeV gamma-ray source HESS J1745-290. Finally we discuss the possible relationship of the Galactic Centre INTEGRAL source IGR J1745.6-2901 to the TeV emission.

arXiv comment10 pages, 7 figures, to appear in ApJ 656

References in corpus (26)

• SINFONI in the Galactic Center: young stars and IR flares in the central light month
• Discovery of Very-High-Energy Gamma-Rays from the Galactic Centre Ridge
• Very high energy gamma rays from the direction of Sagittarius A*
• The Status of the H.E.S.S. Project
• Pulsar Wind Nebulae in Evolved Supernova Remnants
• The Crab Nebula and Pulsar between 500 GeV and 80 TeV: Observations with the HEGRA stereoscopic air Cherenkov telescopes
• Klein-Nishina Effects in the Spectra of Non-Thermal Sources Immersed in External Radiation Fields
• Attenuation of VHE gamma rays by the Milky Way interstellar radiation field
• Detection of Sub-TeV Gamma-Rays from the Galactic Center Direction by CANGAROO-II
• TeV Gamma-Ray Observations of the Galactic Center
• Observation of Gamma Rays from the Galactic Center with the MAGIC Telescope
• Inverse Compton Emission from Galactic Supernova Remnants: Effect of the Interstellar Radiation Field
• Very high energy gamma rays from the composite SNR G0.9+0.1
• Discovery of extended VHE gamma-ray emission from the asymmetric pulsar wind nebula in MSH 15-52 with H.E.S.S
• TeV gamma-rays and the largest masses and annihilation cross sections of neutralino dark matter
• G359.95-0.04: Pulsar Candidate Near Sgr A*
• A possible association of the new VHE gamma-ray source HESS J1825--137 with the pulsar wind nebula G18.0--0.7
• The AGASA/SUGAR Anisotropies and TeV Gamma Rays from the Galactic Center: A Possible Signature of Extremely High-energy Neutrons
• TeV Emission from the Galactic Center Black-Hole Plerion
• A Persistent High-Energy Flux from the Heart of the Milky Way : Integral's view of the Galactic Center
• Stochastic Acceleration in the Galactic Center HESS Source
• XMM-Newton spectral analysis of the Pulsar Wind Nebula within the composite SNR G0.9+0.1
• Detection of hard X-ray emission from the Galactic nuclear region with INTEGRAL
• A Kinship between the EGRET SNR's and Sgr A East
• Nonthermal THz to TeV Emission from Stellar Wind Shocks in the Galactic Center
• Capture of a Red Giant by the Black Hole Sagittarius A* as a Possible Origin for the TeV Gamma Rays from the Galactic Center

Cited by in corpus (52)

• On The Origin Of The Gamma Rays From The Galactic Center
• Acceleration of petaelectronvolt protons in the Galactic Centre
• Teraelectronvolt Astronomy
• Spectrum and variability of the Galactic Center VHE gamma-ray source HESS J1745-290
• Galactic center at very high-energies
• HESS J0632+057 : A new gamma-ray binary?
• Exploring a SNR/Molecular Cloud Association Within HESS J1745-303
• Characterising the VHE diffuse emission in the central 200 parsecs of our Galaxy with H.E.S.S
• Localising the VHE gamma-ray source at the Galactic Centre
• Escape from Vela X
• VERITAS Observations of the Galactic Center Region at Multi-TeV Gamma-Ray Energies
• XMM-Newton observations of HESS J1813-178 reveal a composite Supernova remnant
• XMM-Newton observations reveal the X-ray counterpart of the very-high-energy gamma-ray source HESSJ1640-465
• TeV Gamma-ray Observations of The Galactic Center Ridge By VERITAS
• Indirect Detection of Dark Matter with gamma rays
• Non-thermal Processes in Black-Hole-Jet Magnetospheres
• Observations of Sagittarius A* during the pericenter passage of the G2 object with MAGIC
• Simultaneous H.E.S.S. and Chandra observations of Sagittarius A* during an X-ray flare
• Gamma rays from the Galactic Centre region: a review
• Diffusive shock acceleration in radiation dominated environments
• Ultra-high energy Inverse Compton emission from Galactic electron accelerators
• Very-high energy observations of the Galactic center region by VERITAS in 2010-2012
• A pulsar wind nebula origin of the LHAASO-detected UHE gamma-ray sources
• Diffusion of cosmic-rays and the Gamma-ray Large Area Telescope: Phenomenology at the 1-100 GeV regime
• On the origin of γ-ray emission in η Carina
• Gamma-rays from millisecond pulsar population within the central stellar cluster in the Galactic Center
• Approximation for radiation power of electrons due to inverse-Compton process in the black-body photon field
• A Leptonic Model of Steady High-Energy Gamma-Ray Emission from Sgr A${}^{\ast }$
• High-Energy X-rays from J174545.5-285829, the Cannonball: A Candidate Pulsar Wind Nebula Associated with Sgr A East
• Spectral evolution of non-thermal electron distributions in intense radiation fields
• Leptonic origin of the 100 MeV gamma-ray emission from the Galactic Centre
• Hybrid model of GeV-TeV gamma ray emission from Galactic Center
• Soft gamma-ray constraints on a bright flare from the Galactic Center supermassive black hole
• Connecting the new H.E.S.S. diffuse emission at the Galactic center with the Fermi GeV excess: a combination of millisecond pulsars and heavy dark matter?
• Fermi LAT observations of Sagittarius A*: Imaging Analysis
• Observation of an extended VHE gamma-ray emission from MSH 15-52 with CANGAROO-III
• On the expected $\gamma$-ray emission from nearby flaring stars
• Discovery of an X-ray nebula around PSR J1718-3825 and implications for the nature of the gamma-ray source HESS J1718-385
• Particle acceleration in the expanding blast wave of Eta Carina's Great Eruption of 1843
• Non-thermal emission from Pulsar-Wind Nebulae in Starburst Galaxies
• Modeling the gamma-ray emission in the Galactic Center with a fading cosmic-ray accelerator
• Cosmic rays cannot explain the high ionisation rates in the Galactic centre
• Modelling the time dependence of the TeV Gamma-ray source at the Galactic Centre
• Detection of positron in-flight annihilation from the Galaxy
• Exploring the nature of the unidentified VHE gamma-ray source HESS J1507-622
• High-(Energy)-Lights -- The Very High Energy Gamma-Ray Sky
• Study of the very high energy gamma-ray spectrum from the Galactic Center and future prospects
• HESS J1745$-$290 spectrum explained by a transition in the diffusion regime of PeV cosmic rays in the Sgr A* accretion flow
• Constraints on the non-thermal emission from Eta Carinae's blast wave of 1843
• A refined model of secondary photon emission from heavy WIMP annihilations in the Galactic Centre
• Search for long-term variability of HESS J1745-290
• High Energy Emission from the Galactic Center