Search results for "Astrometry and celestial mechanics: ephemeride"

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Updating the orbital ephemeris of the dipping source XB 1254-690 and the distance to the source

2017

XB 1254-690 is a dipping low mass X-ray binary system hosting a neutron star and showing type I X-ray bursts. We aim at obtaining more accurate orbital ephemeris and at constraining the orbital period derivative of the system for the first time. In addition, we want to better constrain the distance to the source in order to locate the system in a well defined evolutive scenario. We apply for the first time an orbital timing technique to XB 1254-690, using the arrival times of the dips present in the light curves that have been collected during 26 years of X-ray pointed observations performed from different space missions. We estimate the dip arrival times using a statistical method that wei…

Astrophysics::High Energy Astrophysical PhenomenaFOS: Physical sciencesLagrangian pointAstrophysicsStar (graph theory)Ephemeris01 natural sciencesstars: neutron0103 physical sciencesX-rays: star010303 astronomy & astrophysicsHigh Energy Astrophysical Phenomena (astro-ph.HE)Physics010308 nuclear & particles physicsstars: individual (XB 1254690)Astronomy and AstrophysicsQuadratic functionAstronomy and AstrophysicOrbital periodLight curveX-rays: binarieAstrometry and celestial mechanics: ephemerideNeutron starSpace and Planetary Scienceephemerides; stars: individual (XB 1254690); stars: neutron; X-rays: binaries; X-rays: stars; Astronomy and Astrophysics; Space and Planetary Science [Astrometry and celestial mechanics]Astrophysics::Earth and Planetary AstrophysicsAstrophysics - High Energy Astrophysical PhenomenaLow Mass
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