Results 1 to 10 of about 6,376,337 (186)

X-ray Polarimetry of X-ray Pulsars

open access: yesGalaxies
Radiation from X-ray pulsars (XRPs) was expected to be strongly linearly polarized owing to a large difference in their ordinary and extraordinary mode opacities. The launch of IXPE allowed us to check this prediction. IXPE observed a dozen X-ray pulsars,
Juri Poutanen   +2 more
doaj   +4 more sources

Studying Microquasars with X-Ray Polarimetry [PDF]

open access: yesGalaxies, 2018
Microquasars are Galactic black hole systems in which matter is transferred from a donor star and accretes onto a black hole of, typically, 10–20 solar masses.
Giorgio Matt, Francesco Tamborra
doaj   +2 more sources

Observations of Low and Intermediate Spectral Peak Blazars with the Imaging X-Ray Polarimetry Explorer [PDF]

open access: yesThe Astrophysical Journal
We present X-ray polarimetry observations from the Imaging X-ray Polarimetry Explorer (IXPE) of three low spectral peak and one intermediate spectral peak blazars, namely 3C 273, 3C 279, 3C 454.3, and S5 0716+714.
Herman L. Marshall   +164 more
doaj   +4 more sources

IXPE Observations of the Quintessential Wind-accreting X-Ray Pulsar Vela X-1

open access: yesThe Astrophysical Journal Letters, 2023
The radiation from accreting X-ray pulsars was expected to be highly polarized, with some estimates for the polarization degree of up to 80%. However, phase-resolved and energy-resolved polarimetry of X-ray pulsars is required in order to test different ...
Sofia V. Forsblom   +100 more
doaj   +1 more source

Searching for Axion-Like Particles with X-ray Polarimeters

open access: yesGalaxies, 2018
X-ray telescopes are an exceptional tool for searching for new fundamental physics. In particular, X-ray observations have already placed world-leading bounds on the interaction between photons and axion-like particles (ALPs).
Francesca Day, Sven Krippendorf
doaj   +1 more source

X-Ray Polarimetry of the Accreting Pulsar 1A 0535+262 in the Supercritical State with PolarLight

open access: yesThe Astrophysical Journal, 2023
The X-ray pulsar 1A 0535+262 exhibited a giant outburst in 2020, offering us a unique opportunity for X-ray polarimetry of an accreting pulsar in the supercritical state.
Xiangyun Long   +27 more
doaj   +1 more source

Investigating the Properties of the Relativistic Jet and Hot Corona in AGN with X-ray Polarimetry

open access: yesGalaxies
X-ray polarimetry has been suggested as a prominent tool for investigating the geometrical and physical properties of the emissions from active galactic nuclei (AGN).
Dawoon E. Kim   +8 more
doaj   +1 more source

Unlocking the Future of X-Ray Polarimetry with IXPE: Lessons Learned and Next Steps

open access: yesParticles
This paper discusses issues encountered during the early development of the instrument on the Imaging X-ray Polarimetry Explorer (IXPE), a NASA–ASI Small Explorer mission launched on 9 December 2021.
Paolo Soffitta   +9 more
doaj   +1 more source

Handling the Background in IXPE Polarimetric Data

open access: yesThe Astronomical Journal, 2023
Imaging X-ray Polarimetry Explorer (IXPE) is a Small Explorer mission by NASA and Agenzia Spaziale Italiana, launched on 2021 December 9, dedicated to investigating X-ray polarimetry allowing angular-, time-, and energy-resolved observations in the 2–8 ...
Alessandro Di Marco   +20 more
doaj   +1 more source

High-Energy Polarization: Scientific Potential and Model Predictions

open access: yesGalaxies, 2017
Understanding magnetic field strength and morphology is very important for studying astrophysical jets. Polarization signatures have been a standard way to probe the jet magnetic field.
Haocheng Zhang
doaj   +1 more source

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