Search results for "X-rays:binaries"

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MAXI J1957+032: a new accreting millisecond X-ray pulsar in an ultra-compact binary

2022

The detection of coherent X-ray pulsations at ~314 Hz (3.2 ms) classifies MAXI J1957+032 as a fast-rotating, accreting neutron star. We present the temporal and spectral analysis performed using NICER observations collected during the latest outburst of the source. Doppler modulation of the X-ray pulsation revealed the ultra-compact nature of the binary system characterised by an orbital period of ~1 hour and a projected semi-major axis of 14 lt-ms. The neutron star binary mass function suggests a minimum donor mass of 1.7e-2 Msun, assuming a neutron star mass of 1.4 Msun and a binary inclination angle lower than 60 degrees. This assumption is supported by the lack of eclipses or dips in th…

High Energy Astrophysical Phenomena (astro-ph.HE)general–stars:neutron [Binaries]FOS: Physical sciencesAstronomy and Astrophysicsaccretion discsbinaries:generalX-rays:binariesSettore FIS/05 - Astronomia E AstrofisicaaccretionSpace and Planetary Sciencebinaries [X-rays]stars:neutronAstrophysics - High Energy Astrophysical PhenomenaAstrophysics - Instrumentation and Methods for AstrophysicsInstrumentation and Methods for Astrophysics (astro-ph.IM)accretion disks [Accretion]
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The INTEGRAL view of the pulsating hard X-ray sky: from accreting and transitional millisecond pulsars to rotation-powered pulsars and magnetars

2020

arXiv:2012.01346v1

Astrophysics::High Energy Astrophysical PhenomenaPopulationFOS: Physical sciencesAstrophysicsMagnetarQuantitative Biology::OtherComputer Science::Digital Libraries01 natural sciencesNeutron starsX-rays: binariesSettore FIS/05 - Astronomia E AstrofisicaPulsarMillisecond pulsar0103 physical sciencesMagnetarsAccretion disks magnetars neutron stars pulsar X-rays:binaries X-rays:burstseducationX-rays: bursts010303 astronomy & astrophysicsPulsarsPhysicsHigh Energy Astrophysical Phenomena (astro-ph.HE)education.field_of_study010308 nuclear & particles physicsCrab PulsarAstrophysics::Instrumentation and Methods for AstrophysicsAstronomy and AstrophysicsAccretion (astrophysics)Neutron starSpace and Planetary ScienceAccretion disksSpin-upAstrophysics - High Energy Astrophysical Phenomena[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]
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