Search results for "44"

showing 10 items of 1507 documents

Suzaku broad-band spectrum of 4U 1705-44: probing the reflection component in the hard state

2015

Iron emission lines at 6.4-6.97 keV, identified with Kalpha radiative transitions, are among the strongest discrete features in the X-ray band. These are one of the most powerful probes to infer the properties of the plasma in the innermost part of the accretion disk around a compact object. In this paper we present a recent Suzaku observation, 100-ks effective exposure, of the atoll source and X-ray burster 4U 1705-44, where we clearly detect signatures of a reflection component which is distorted by the high-velocity motion in the accretion disk. The reflection component consists of a broad iron line at about 6.4 keV and a Compton bump at high X-ray energies, around 20 keV. All these feat…

High Energy Astrophysical Phenomena (astro-ph.HE)Physicsline: formation line: identification stars: individual: 4U 1705-44 stars: neutron X-rays: binaries X-rays: generalAstrophysics::High Energy Astrophysical PhenomenaFOS: Physical sciencesBroad bandAstronomyAstronomy and AstrophysicsSettore FIS/05 - Astronomia E AstrofisicaSpace and Planetary Scienceformation line: identification stars: individual: 4U 1705-44 stars: neutron X-rays: binaries X-rays: general [line]Astrophysics::Earth and Planetary AstrophysicsAstrophysics - High Energy Astrophysical PhenomenaHumanitiesAstrophysics::Galaxy Astrophysics
researchProduct

The pulse profile and spin evolution of the accreting pulsar in Terzan 5, IGR J17480-2446, during its 2010 outburst

2012

(abridged) We analyse the spectral and pulse properties of the 11 Hz transient accreting pulsar, IGR J17480-2446, in the globular cluster Terzan 5, considering all the available RXTE, Swift and INTEGRAL observations performed between October and November, 2010. By measuring the pulse phase evolution we conclude that the NS spun up at an average rate of =1.48(2)E-12 Hz/s, compatible with the accretion of the Keplerian angular momentum of matter at the inner disc boundary. Similar to other accreting pulsars, the stability of the pulse phases determined by using the second harmonic component is higher than that of the phases based on the fundamental frequency. Under the assumption that the sec…

High Energy Astrophysical Phenomena (astro-ph.HE)Settore FIS/05 - Astronomia E AstrofisicaAstrophysics::High Energy Astrophysical Phenomenaneutron pulsars: individual: IGR J17480-2446 X-rays: binaries [accretion accretion discs stars]FOS: Physical sciencesAstrophysics::Solar and Stellar Astrophysicsaccretion accretion discs stars: neutron pulsars: individual: IGR J17480-2446 X-rays: binariesAstrophysics::Cosmology and Extragalactic AstrophysicsAstrophysics::Earth and Planetary AstrophysicsAstrophysics - High Energy Astrophysical PhenomenaAstrophysics::Galaxy Astrophysics
researchProduct

A transient ultraluminous X-ray source in NGC 55

2022

Ultraluminous X-ray sources (ULXs) are a class of accreting compact objects with X-ray luminosities above 10$^{39}$ erg s$^{-1}$. The average number of ULXs per galaxy is still not well constrained, especially given the uncertainty on the fraction of ULX transients. Here, we report the identification of a new transient ULX in the galaxy NGC 55 (which we label as ULX-2), thanks to recent XMM-Newton and the Neil Gehrels Swift Observatory observations. This object was previously classified as a transient X-ray source with a luminosity around a few 10$^{38}$ erg s$^{-1}$ in a 2010 XMM-Newton observation. Thanks to new and deeper observations ($\sim$ 130 ks each), we show that the source reaches…

High Energy Astrophysical Phenomena (astro-ph.HE)Settore FIS/05 - Astronomia E AstrofisicaaccretionSpace and Planetary Scienceaccretion discFOS: Physical sciencesAstronomy and AstrophysicsAstrophysics - High Energy Astrophysical PhenomenaX-rays: binarieX-rays: individual: XMMU J001446.81-391123.48
researchProduct

"Table 4" of "Inclusive heavy-flavour production at central and forward rapidity in Xe-Xe collisions at $\sqrt {s_{NN}}$=5.44$ TeV"

2021

Transverse momentum differential production of muons from heavy-flavour hadron decays at forward rapidity in Xe-Xe collisions at 5.44 TeV.

High Energy Physics::PhenomenologyPhysics::Accelerator PhysicsHigh Energy Physics::Experiment$frac{1}{2#pi #it{p}_{T}} #frac{1}{#it{N}_{ev}} #frac{d^{2}#it{N}}{d#it{p}_{T} d#it{y}} (GeV/#it{c})^{-2}$Nuclear ExperimentXe Xe --> MUON X5440
researchProduct

"Table 2" of "Inclusive heavy-flavour production at central and forward rapidity in Xe-Xe collisions at $\sqrt {s_{NN}}$=5.44$ TeV"

2021

Transverse momentum differential production of muons from heavy-flavour hadron decays at forward rapidity in Xe-Xe collisions at 5.44 TeV.

High Energy Physics::PhenomenologyPhysics::Accelerator PhysicsHigh Energy Physics::Experiment$frac{1}{2#pi #it{p}_{T}} #frac{1}{#it{N}_{ev}} #frac{d^{2}#it{N}}{d#it{p}_{T} d#it{y}} (GeV/#it{c})^{-2}$Nuclear ExperimentXe Xe --> MUON X5440
researchProduct

"Table 1" of "Inclusive heavy-flavour production at central and forward rapidity in Xe-Xe collisions at $\sqrt {s_{NN}}$=5.44$ TeV"

2021

Transverse momentum differential production of muons from heavy-flavour hadron decays at forward rapidity in Xe-Xe collisions at 5.44 TeV.

High Energy Physics::PhenomenologyPhysics::Accelerator PhysicsHigh Energy Physics::Experiment$frac{1}{2#pi #it{p}_{T}} #frac{1}{#it{N}_{ev}} #frac{d^{2}#it{N}}{d#it{p}_{T} d#it{y}} (GeV/#it{c})^{-2}$Nuclear ExperimentXe Xe --> MUON X5440
researchProduct

"Table 3" of "Inclusive heavy-flavour production at central and forward rapidity in Xe-Xe collisions at $\sqrt {s_{NN}}$=5.44$ TeV"

2021

Transverse momentum differential production of muons from heavy-flavour hadron decays at forward rapidity in Xe-Xe collisions at 5.44 TeV.

High Energy Physics::PhenomenologyPhysics::Accelerator PhysicsHigh Energy Physics::Experiment$frac{1}{2#pi #it{p}_{T}} #frac{1}{#it{N}_{ev}} #frac{d^{2}#it{N}}{d#it{p}_{T} d#it{y}} (GeV/#it{c})^{-2}$Nuclear ExperimentXe Xe --> MUON X5440
researchProduct

"Table 10" of "Inclusive heavy-flavour production at central and forward rapidity in Xe-Xe collisions at $\sqrt {s_{NN}}$=5.44$ TeV"

2021

Transverse momentum differential RAA of muons from heavy-flavour hadron decays at forward rapidity in Xe-Xe collisions at 5.44 TeV.

High Energy Physics::PhenomenologyPhysics::Accelerator PhysicsHigh Energy Physics::ExperimentNuclear ExperimentXe Xe --> MUON XRAA5440
researchProduct

"Table 7" of "Inclusive heavy-flavour production at central and forward rapidity in Xe-Xe collisions at $\sqrt {s_{NN}}$=5.44$ TeV"

2021

Transverse momentum differential RAA of muons from heavy-flavour hadron decays at forward rapidity in Xe-Xe collisions at 5.44 TeV.

High Energy Physics::PhenomenologyPhysics::Accelerator PhysicsHigh Energy Physics::ExperimentNuclear ExperimentXe Xe --> MUON XRAA5440
researchProduct

"Table 9" of "Inclusive heavy-flavour production at central and forward rapidity in Xe-Xe collisions at $\sqrt {s_{NN}}$=5.44$ TeV"

2021

Transverse momentum differential RAA of muons from heavy-flavour hadron decays at forward rapidity in Xe-Xe collisions at 5.44 TeV.

High Energy Physics::PhenomenologyPhysics::Accelerator PhysicsHigh Energy Physics::ExperimentNuclear ExperimentXe Xe --> MUON XRAA5440
researchProduct