0000000001089658

AUTHOR

Tuomo Salmi

showing 3 related works from this author

Timing Analysis of the 2022 Outburst of the Accreting Millisecond X-Ray Pulsar SAX J1808.4-3658: Hints of an Orbital Shrinking

2022

We present a pulse timing analysis of NICER observations of the accreting millisecond X-ray pulsar SAX J1808.4$-$3658 during the outburst that started on 2022 August 19. Similar to previous outbursts, after decaying from a peak luminosity of $\simeq 1\times10^{36} \, \mathrm{erg \, s^{-1}}$ in about a week, the pulsar entered in a $\sim 1$ month-long reflaring stage. Comparison of the average pulsar spin frequency during the outburst with those previously measured confirmed the long-term spin derivative of $\dot{\nu}_{\textrm{SD}}=-(1.15\pm0.06)\times 10^{-15} \, \mathrm{Hz\,s^{-1}}$, compatible with the spin-down torque of a $\approx 10^{26} \, \mathrm{G \, cm^3}$ rotating magnetic dipole.…

High Energy Astrophysical Phenomena (astro-ph.HE)Settore FIS/05 - Astronomia E AstrofisicaSpace and Planetary ScienceFOS: Physical sciencesMillisecond pulsarAstronomy and AstrophysicsAstrophysics - High Energy Astrophysical PhenomenaStellar accretion diskNeutron starsThe Astrophysical Journal Letters
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Observatory science with eXTP

2019

Disponible preprint en: arXiv:1812.04023v1 [astro-ph.HE] [v1] Mon, 10 Dec 2018 19:00:52 UTC (4,376 KB)

cataclysmic binariesAstronomyFIELD CAMERAS OBSERVATIONSspace research instruments nuclear astrophysics flare stars accretion and accretion disks mass loss and stellar winds cataclysmic binaries X-ray binaries supernova remnants active galactic nuclei X-ray bursts gamma-ray bursts gravitational wavesGeneral Physics and Astronomygamma-ray burstspace research instrument01 natural sciencesGamma ray burstsObservatoryAccretion and accretion disksAstrophysics::Solar and Stellar Astrophysics010303 astronomy & astrophysicsgravitational waveaccretion and accretion diskPhysicsHigh Energy Astrophysical Phenomena (astro-ph.HE)supernova remnants[SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph][SDU.ASTR.HE]Sciences of the Universe [physics]/Astrophysics [astro-ph]/High Energy Astrophysical Phenomena [astro-ph.HE]flare starsgamma-ray burstsAstrophysics::Instrumentation and Methods for Astrophysicsaccretion and accretion disks; active galactic nuclei; cataclysmic binaries; flare stars; gamma-ray bursts; gravitational waves; mass loss and stellar winds; nuclear astrophysics; space research instruments; supernova remnants; X-ray binaries; X-ray bursts; Physics and Astronomy (all)Space research instrumentsX ray burstSupernovaX-ray binariesgravitational wavesaccretion and accretion disksQUIETHigh massX-ray binarieMass loss and stellar windsNuclear astrophysicsGamma-ray burstsspace research instrumentsAstrophysics - High Energy Astrophysical PhenomenaPULSAR-WIND NEBULAEFAST RADIO-BURSTSAstrofísica nuclearActive galactic nucleusTIDAL DISRUPTIONSupernova remnantsAstrophysics::High Energy Astrophysical Phenomenanuclear astrophysicsPolarimetryFOS: Physical sciencesAstrophysics::Cosmology and Extragalactic AstrophysicsACCRETING NEUTRON-STARSaccretion and accretion disks; active galactic nuclei; cataclysmic binaries; flare stars; gamma-ray bursts; gravitational waves; mass loss and stellar winds; nuclear astrophysics; space research instruments; supernova remnants; X-ray binaries; X-ray burstsGravitational wavesPhysics and Astronomy (all)cataclysmic binarieSettore FIS/05 - Astronomia e AstrofisicaSUPERMASSIVE BLACK-HOLES0103 physical sciences010306 general physicsX-ray burstAstrophysics::Galaxy AstrophysicsCataclysmic binariesActive galactic nucleiflare starAstronomyWhite dwarfFlare starsStarssupernova remnantQB460-466 Astrophysics[SDU]Sciences of the Universe [physics]mass loss and stellar wind:Física::Astronomia i astrofísica [Àrees temàtiques de la UPC]active galactic nucleiX-RAYX-ray burstsSupernova remmantsmass loss and stellar windsX ray binaries[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]SEYFERT 1 GALAXYnuclear astrophysic
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Dense matter with eXTP

2019

In this White Paper we present the potential of the Enhanced X-ray Timing and Polarimetry (eXTP) mission for determining the nature of dense matter; neutron star cores host an extreme density regime which cannot be replicated in a terrestrial laboratory. The tightest statistical constraints on the dense matter equation of state will come from pulse profile modelling of accretion-powered pulsars, burst oscillation sources, and rotation-powered pulsars. Additional constraints will derive from spin measurements, burst spectra, and properties of the accretion flows in the vicinity of the neutron star. Under development by an international Consortium led by the Institute of High Energy Physics o…

GAMMA-RAY PULSARSdense matterAstrophysics::High Energy Astrophysical PhenomenaPolarimetryGeneral Physics and AstronomyFOS: Physical sciencesAstrophysicsNeutronBRIGHTNESS OSCILLATIONS7. Clean energy01 natural sciencesINNER ACCRETION DISKSSpectral lineX-raydense matter; equation of state; neutron; X-rays; Physics and Astronomy (all)Physics and Astronomy (all)Equacions d'estatneutronPulsar0103 physical sciencesMILLISECOND PULSARSX-raysNEUTRON-STARRADIUS CONSTRAINTS010306 general physics010303 astronomy & astrophysicsRELATIVISTIC IRON LINEequation of statePhysicsHigh Energy Astrophysical Phenomena (astro-ph.HE)LIGHT CURVESNeutronsEquation of stateQUASI-PERIODIC OSCILLATIONSX-RaysStarke Wechselwirkung und exotische Kerne – Abteilung BlaumAstrophysics::Instrumentation and Methods for AstrophysicsEQUATION-OF-STATEAccretion (astrophysics)Neutron star:Física::Astronomia i astrofísica [Àrees temàtiques de la UPC]Raigs XAstrophysics::Earth and Planetary AstrophysicsAstrophysics - High Energy Astrophysical PhenomenaDense matterDense matter
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