0000000000994742

AUTHOR

Davide Lazzati

showing 2 related works from this author

IGR J17451-3022: a dipping and eclipsing low mass X-ray binary

2016

In this paper, we report on the available X-ray data collected by INTEGRAL, Swift, and XMM-Newton during the first outburst of the INTEGRAL transient IGR J17451-3022, discovered in 2014 August. The monitoring observations provided by the JEM-X instruments on-board INTEGRAL and the Swift/XRT showed that the event lasted for about 9 months and that the emission of the source remained soft for the entire period. The source emission is dominated by a thermal component (kT~1.2 keV), most likely produced by an accretion disk. The XMM-Newton observation carried out during the outburst revealed the presence of multiple absorption features in the soft X-ray emission that could be associated to the p…

PhysicsHigh Energy Astrophysical Phenomena (astro-ph.HE)010308 nuclear & particles physicsAstrophysics::High Energy Astrophysical PhenomenaX-ray binaryFOS: Physical sciencesX-rays: individuals: IGR J17451-3022Astronomy and AstrophysicsAbsorption columnAstrophysicsAstronomy and AstrophysicOrbital periodX-rays: binarie01 natural sciencesSettore FIS/05 - Astronomia E AstrofisicaAccretion discSpace and Planetary ScienceIonization0103 physical sciencesThermalbinaries; X-rays: individuals: IGR J17451-3022; Astronomy and Astrophysics; Space and Planetary Science [X-rays]Astrophysics - High Energy Astrophysical PhenomenaLow MassAbsorption (electromagnetic radiation)010303 astronomy & astrophysics
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X-Ray Eclipse Time Delays in 4U2129+47

2007

4U 2129+47 was discovered in the early 80's and classified as an accretion disk corona source due to its broad and partial X-ray eclipses. The 5.24 hr binary orbital period was inferred from the X-ray and optical light curve modulation, implying a late K or M spectral type companion star. The source entered a low state in 1983, during which the optical modulation disappeared and an F8 IV star was revealed, suggesting that 4U 2129+47 might be part of a triple system. The nature of 4U 2129+47 has since been investigated, but no definitive conclusion has been reached. Here, we present timing and spectral analyses of two XMM-Newton observations of this source, carried out in May and June, 2005.…

Physicsaccretion disksAstrophysics (astro-ph)Binary numberbinaries: eclipsingFOS: Physical sciencesAstronomy and AstrophysicsX-rays: starsAstrophysicsAstrophysicsLight curveOrbital periodCoronastars: individual: 4U 2129+47stars: neutronaccretionSpace and Planetary ScienceOrbital motionModulation (music)Center of massEclipse
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