Results 81 to 90 of about 13,399 (197)

Star-XP: A simulation framework for Polar-2/ low energy X-ray polarization detector

open access: yesSoftwareX
Star-XP is a simulation framework specifically designed for the Low Energy X-ray Polarization Detector (LPD) onboard the POLAR-2 mission. It is capable of simulating the emission of particles from given sources and the interaction of these particles with
Di-Fan Yi   +8 more
doaj   +1 more source

General relativistic x ray (UV) polarization rotations as a quantitative test for black holes [PDF]

open access: yes
It is now 11 years since a potentially easily observable and quantitative test for black holes using general relativistic polarization rotations was proposed (Stark and Connors 1977, and Connors and Stark 1977).
Stark, Richard F.
core   +1 more source

The soft X-ray polarization in obscured AGN

open access: yes, 2009
The soft X-ray emission in obscured active galactic nuclei (AGN) is dominated by emission lines, produced in a gas photoionized by the nuclear continuum and likely spatially coincident with the optical narrow line region (NLR). However, a fraction of the
Bianchi, Stefano   +5 more
core   +1 more source

Scattering Polarimetry in the Hard X-ray Range

open access: yesInstruments
In one and a half years, the Imaging X-ray Polarimetry Explorer has demonstrated the role and the potentiality of Polarimetry in X-ray Astronomy. The next steps include extension to higher energies.
Enrico Costa
doaj   +1 more source

Spatiotemporally Resolved Orbital Hall Effect in a Topological Semimetal

open access: yesAdvanced Materials, Volume 38, Issue 4, 16 January 2026.
Real‐space mapping of orbital angular momentum (OAM) transport is achieved using contact‐free polarimetric terahertz spectroscopy. This principle is applied to the topological semimetal Td‐WTe2, revealing the spatial separation of electrons into two distinct regions characterized by opposite out‐of‐plane OAM (±Lz).
Byung Cheol Park   +8 more
wiley   +1 more source

X-Ray and Gamma-Ray Polarization in Leptonic and Hadronic Jet Models of Blazars

open access: yes, 2013
We present a theoretical analysis of the expected X-ray and gamma-ray polarization signatures resulting from synchrotron self-Compton emission in leptonic models, compared to the polarization signatures from proton synchrotron and cascade synchrotron ...
Boettcher, Markus, Zhang, Haocheng
core   +1 more source

The Imaging X-ray Polarimetry Explorer (IXPE) and New Directions for the Future

open access: yesInstruments
An observatory dedicated to X-ray polarimetry has been operational since 9 December 2021. The Imaging X-ray Polarimetry Explorer (IXPE), a collaboration between NASA and ASI, features three X-ray telescopes equipped with detectors sensitive to linear ...
Paolo Soffitta
doaj   +1 more source

Design and Tests of the Hard X-ray Polarimeter X-Calibur

open access: yesActa Polytechnica CTU Proceedings, 2014
X-ray polarimetry promises to give qualitatively new information bout high-energy astrophysical sources, such as binary black hole  systems, micro-quasars, active galactic nuclei, and gamma-ray bursts.
M. Beilicke   +15 more
doaj   +1 more source

Considerations on Possible Directions for a Wide Band Polarimetry X-ray Mission

open access: yesGalaxies
The Imaging X-ray Polarimetry Explorer (IXPE) has confirmed that X-ray polarimetry is a valuable tool in astronomy, providing critical insights into the emission processes and the geometry of compact objects.
Paolo Soffitta   +32 more
doaj   +1 more source

Stellar X-Ray Polarimetry [PDF]

open access: yes, 2011
Most of the stellar end-state black holes, pulsars, and white dwarfs that are X-ray sources should have polarized X-ray fluxes. The degree will depend on the relative contributions of the unresolved structures.
Swank, J.
core   +1 more source

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