TeV Gamma-rays from accreting magnetars in massive binaries

Abstract

We consider the neutron star (NS) of the magnetar type inside the massive binary system. We determine the conditions under which the matter from the stellar wind can penetrate the inner magnetosphere of the magnetar. At some distance from the NS surface, the magnetic pressure can balance the gravitational pressure of the accreting matter creating very turbulent, magnetized transition region. It is suggested that this region provides good conditions for acceleration of electrons to relativistic energies. These electrons lose energy on the synchrotron process and the Inverse Compton (IC) scattering of the radiation from the nearby massive stellar companion, producing high energy radiation from the X-rays up to $\sim$TeV $\gamma$-rays. The primary $\gamma$-rays can be farther absorbed in the stellar radiation developing the IC $e^{\pm }$ pair cascade. We calculate the synchrotron X-ray emission from primary electrons and secondary $e^{\pm }$ pairs and the IC $\gamma$-ray emission from the cascade process. It is shown that the quasi-simultaneous observations of the TeV $\gamma$-ray binary system LSI +61 303 in the X-ray and the TeV $\gamma$-ray energy ranges can be explained in such an accreting magnetar model.

5 pages, 1 figure, 1 table, submitted to MNRAS

References in corpus (8)

• Variable Very High Energy Gamma-ray Emission from the Microquasar LS I +61 303
• VERITAS Observations of the gamma-Ray Binary LS I +61 303
• INTEGRAL and XMM-Newton observations of LSI +61 303
• Joint H-alpha and X-Ray Observations of Massive X-Ray Binaries. II. The Be X-ray Binary and Microquasar LS I +61 303
• Multi-wavelength (radio, X-ray and gamma-ray) observations of the gamma-ray binary LS I +61 303
• Long Term X-ray Monitoring Of The TeV Binary LS I +61 303 with RXTE
• Gamma-rays from the vicinity of accreting neutron stars inside compact high-mass X-ray binaries
• High energy gamma-rays from massive binary systems

Cited by in corpus (14)

• Gamma-ray binaries and related systems
• A magnetar-like event from LS I +61 303 and its nature as a gamma-ray binary
• A propeller scenario for the gamma-ray emission of low-mass X-ray binaries: The case of XSS J12270-4859
• Unveiling the super-orbital modulation of LS I +61 303 in X-rays
• Possible changes of state and relevant timescales for a neutron star in LS I +61°303
• Estimating the contribution of Galactic sources to the diffuse neutrino flux
• Long-term X-ray monitoring of LS I +61 303: analysis of spectral variability and flares
• Detection of the gamma-ray binary LS I +61 303 in a low flux state at Very High Energy gamma-rays with the MAGIC Telescopes in 2009
• High energy gamma-ray emission from compact galactic sources in the context of observations with the next generation Cherenkov Telescope Arrays
• On the possibility of sub-TeV Gamma-ray emission from Cyg X-3
• Does the gamma-ray binary LS I +61°303 harbor a magnetar?
• Deep search for gamma-ray emission from the accreting X-ray pulsar 1A 0535+262
• Optical depths for gamma-rays in the radiation field of a star heated by external X-ray source in LMXBs: Application to Her X-1 and Sco X-1
• Probing the emission mechanism and nature of the pulsating compact object in the X-ray binary SAX J1324.4-6200