0000000000848784

AUTHOR

Michael T. Wolff

showing 1 related works from this author

NuSTAR and NICER reveal IGR J17591-2342 as a new accreting millisecond X-ray pulsar

2018

We report the discovery by the Nuclear Spectroscopic Telescope Array (NuSTAR) and the Neutron Star Interior Composition Explorer (NICER) of the accreting millisecond X-ray pulsar IGR J17591-2342. Coherent X-ray pulsations around 527.4 Hz (1.9 ms) with a clear Doppler modulation were detected. This implies an orbital period of ∼8.8 h and a projected semi-major axis of ∼1.23 lt-s. With the binary mass function, we estimate a minimum companion mass of 0.42 M, obtained assuming a neutron star mass of 1.4[subscript ⊙] and an inclination angle lower than 60°, as suggested by the absence of eclipses or dips in the light curve of the source. The broad-band energy spectrum, obtained by combining NuS…

AccretionAstrophysics::High Energy Astrophysical Phenomenageneral [Pulsars]FOS: Physical sciencesAstrophysicsAstrophysics::Cosmology and Extragalactic Astrophysics01 natural sciencesSpectral linelaw.inventionTelescopeX-rays: binariesSettore FIS/05 - Astronomia E AstrofisicaPulsarlow-mass [Stars]lawstars: low-mass0103 physical sciencesStars: low-maAstrophysics::Solar and Stellar Astrophysics010303 astronomy & astrophysicsAstrophysics::Galaxy AstrophysicsPhysicsHigh Energy Astrophysical Phenomena (astro-ph.HE)Neutron Star Interior Composition Explorer010308 nuclear & particles physicsComputer Science::Information Retrievalaccretion disksneutron [Stars]Astronomy and AstrophysicsAstronomy and AstrophysicOrbital periodLight curveX-rays: binarieStars: neutronNeutron starPulsars: generalAccretion diskSpace and Planetary ScienceAccretion disksbinaries [X-rays]Astrophysics::Earth and Planetary AstrophysicsAstrophysics - High Energy Astrophysical Phenomena[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]X-ray pulsar
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