A cosmic-ray explanation of the galactic ridge of cosmic X-rays

  title={A cosmic-ray explanation of the galactic ridge of cosmic X-rays},
  author={C. L. Bhat and Tadashi Kifune and Arnold Whittaker Wolfendale},
Recent observations1 with the Exosat X-ray satellite have confirmed the existence of an apparently diffuse galactic ridge of emission extending over the inner Galaxy (l = 320° −40°) and confined to about ±2° in galactic latitude. On the basis of measurements2 carried out in the galactic plane at l≃55°, we have proposed previously3 that the diffuse galactic X-ray flux known at that time could be understood in terms of the synchrotron radiation of cosmic-ray electrons in the galactic magnetic… Expand
2 Citations
X-Ray Observations of the Galactic Centre
Observations of the galactic centre region in the photon energy range 2–500 keV are reviewed. Point sources, transients, bursts and a patch of apparently diffuse emission ~1° in extent have all beenExpand
Shape memory nanocomposite fibers for untethered high-energy microengines
Torsionally stiffened shape memory nanocomposite fibers can be transformed upon insertion of twist to store and provide fast and high-energy rotations, delivering a gravimetric work capacity that is 60 times higher than that of natural skeletal muscles. Expand


First observation of ultra-high-energy γ rays from LMC X-4
Ultra-high-energy γ rays (>1015 eV) have recently been observed from Cygnus X-3 (refs 1, 2) and from Vela X-1 (ref. 3). The discovery that some neutron star binary X-ray sources are emittingExpand
Cosmic γ rays and cosmic-ray particles
Recent experiments using extensive air shower techniques1–5 have given evidence for the presence of significant fluxes of cosmic γ rays, in the energy range 1015–1016 eV, from specific cosmicExpand
Is Cygnus X-3 a monoenergetic 1017 eV accelerator?
Like many other X-ray sources, Cygnus X-3 seems to be a binary system that includes a compact object, but it is unusual in being enshrouded in gas, in displaying occasional huge outbursts and inExpand
Observation of γ rays >1015 eV from Cygnus X-3
The X-ray binary system Cygnus X-3 is a source of particular interest. As well as emitting X rays which are modulated with a 4.8-h period, it has been observed in 30–100 MeV γ rays by the SAS IIExpand
A galactic component of the diffuse X-ray flux in the range 2–7 keV
An analysis of the spatial distribution of the 2-7 keV X-ray background measured by Uhuru and reported by Schwartz (1979) is presented. The latitude distribution above 10 deg is consistent with aExpand
The galactic ridge observed by Exosat
We have used Exosat to map the distribution of X-ray emission in the galactic plane. In addition to numerous point sources, the map reveals a narrow continuous ridge of emission which extends alongExpand
Implications of 1016 eV γ rays from Cyg X-3
Samorski and Stamm1 have reported and Lloyd-Evans et al.2 have recently confirmed the detection of high-energy quanta, presumably γ rays, with energies E>2×1015 eV from Cygnus X-3. These ultra-highExpand
Evidence for a Galactic Component of the Diffuse X-ray Background
Rocket measurements have shown an excess of radiation in the galactic plane in the Vela–Carina–Centaurus region. This article presents the evidence and considers the possible explanations.