Search results for "Stars: Individual: Constellation Name: Scorpius X-1"

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A Hard X-Ray View of Scorpius X-1 with INTEGRAL : Nonthermal Emission?

2006

We present here simultaneous INTEGRAL/RXTE observations of Sco X-1, and in particular a study of the hard X-ray emission of the source and its correlation with the position in the Z-track of the X-ray color-color diagram. We find that the hard X-ray (above about 30 keV) emission of Sco X-1 is dominated by a power-law component with a photon index of ~3. The flux in the power-law component slightly decreases when the source moves in the color-color diagram in the sense of increasing inferred mass accretion rate from the horizontal branch to the normal branch/flaring branch vertex. It becomes not significantly detectable in the flaring branch, where its flux has decreased by about an order of…

AccretionPhotonAstrophysics::High Energy Astrophysical PhenomenaFOS: Physical sciencesFluxAstrophysicsAstrophysics01 natural sciencesneutron starsX-ray[PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO]Position (vector)Accretion DisksStars: Neutron0103 physical sciencesX-Rays: StarsAstrophysics::Solar and Stellar Astrophysics010303 astronomy & astrophysicsPhysics[SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph]010308 nuclear & particles physicsAstrophysics (astro-ph)DiagramAstronomy and AstrophysicsSense (electronics)Horizontal branchX-Rays: BinariesX-Rays: GeneralSpace and Planetary ScienceVertex (curve)accreting millisecondStars: Individual: Constellation Name: Scorpius X-1Order of magnitudeThe Astrophysical Journal
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