Search results for " atomic processes"

showing 2 items of 2 documents

The Zoo of emission lines in the spectrum of Cir X-1 observed by XMM-Newton

2007

We present the preliminary analysis of a 10 ks XMM-Newton EPIC/pn observation of Cir X-1 immediately after the zero phase. The continuum emission is modeled using a blackbody component partially absorbed by neutral matter probably located around the binary system. We detect a forest of emission lines associated to highly ionized ions.

PhysicsAstrophysics::High Energy Astrophysical PhenomenaAstronomyAtomic and molecular dataAstrophysicsAtomic processes and interactionSpectraEPICPolarization (waves)Spectral parametersPhotoionization of atoms and ionPreliminary analysisIonIonizationBlack-body radiationEmission spectrumBinary systemAtomic and molecular data; Atomic processes and interactions; Photoionization of atoms and ions; Spectra; Spectral parameters
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Chandra X-ray spectroscopy of a clear dip in GX 13+1

2014

The source GX 13+1 is a persistent, bright Galactic X-ray binary hosting an accreting neutron star. It shows highly ionized absorption features, with a blueshift of $\sim$ 400 km s$^{-1}$ and an outflow-mass rate similar to the accretion rate. Many other X-ray sources exhibit warm absorption features, and they all show periodic dipping behavior at the same time. Recently, a dipping periodicity has also been determined for GX 13+1 using long-term X-ray folded light-curves, leading to a clear identification of one of such periodic dips in an archival Chandra observation. We give the first spectral characterization of the periodic dip of GX 13+1 found in this archival Chandra observation perfo…

PhysicsHigh Energy Astrophysical Phenomena (astro-ph.HE)X-ray spectroscopyAstrophysics::High Energy Astrophysical PhenomenaFOS: Physical sciencesAstronomy and AstrophysicsAstrophysicsAstrophysics::Cosmology and Extragalactic AstrophysicsOrbital periodbinaries radiation mechanisms: general stars: neutron atomic processes [X-rays]BlueshiftAccretion rateNeutron starSettore FIS/05 - Astronomia E AstrofisicaSpace and Planetary ScienceBulgeIonizationWarm absorptionX-rays: binaries radiation mechanisms: general stars: neutron atomic processesAstrophysics - High Energy Astrophysical PhenomenaAstrophysics::Galaxy Astrophysics
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