REVIEW 6 cited by
Determination of X-ray pulsar geometry with IXPE polarimetry
Not yet reviewed by Pith; the record is open.
This paper has not been read by Pith yet. Machine review is queued; the pith claim, tier, and objections will appear here once it completes.
SPECIMEN: schema-true, not a live event
T0 review · schema-true
One-sentence machine reading of the paper's core claim.
pith:XXXXXXXX · record.json · timestamp
abstract
Using observations of X-ray pulsar Her X-1 by the Imaging X-ray Polarimetry Explorer, we report on a highly significant ($>17\sigma$) detection of the polarization signal from an accreting neutron star. The observed degree of the linear polarization of $\sim$10\% is found to be far below theoretical expectations for this object, and stays low throughout the spin cycle of the pulsar. Both the polarization degree and the angle exhibit variability with pulse phase, which allowed us to measure the pulsar spin position angle 57(2) deg and the magnetic obliquity 12(4) deg, which is an essential step towards detailed modelling of the intrinsic emission of X-ray pulsars. Combining our results with the optical polarimetric data, we find that the spin axis of the neutron star and the angular momentum of the binary orbit are misaligned by at least $\sim$20 deg, which is a strong argument in support of the models explaining stability of the observed super-orbital variability with the precession of the neutron star.
Forward citations
Cited by 6 Pith papers
-
Real-time observations of the transition to the quiescent state in an accreting magnetised neutron star: No propeller required?
First high-cadence observation of an X-ray pulsar transition to quiescence shows a gradual exponential fade consistent with the disc instability model, without requiring the propeller effect.
-
Proof of Concept Measurements of Laterally Graded Multilayers for Soft X-ray Spectropolarimetry
Cr/Sc and W/B4C laterally graded multilayer mirrors modulate soft X-ray reflection with polarization angle, showing ~100% modulation at Brewster angle and ~80% at 30° incidence.
-
Information content of JWST transmission spectroscopy of the exoplanet HAT-P-12b from the optical to the mid-infrared
Combined JWST NIRISS+NIRSpec+MIRI transmission spectra of HAT-P-12b detect four molecules and show multi-instrument data are required for consistent abundances, non-gray clouds and H2S.
-
The hitchhiker's guide to the IXPE data analysis
A user-oriented guide that collects best practices, data formats, and analysis strategies for extracting polarimetric information from IXPE observations.
-
Physics of Strong Magnetism with eXTP
The eXTP mission's planned instruments would enable more sensitive X-ray polarization and timing observations of magnetars and accreting pulsars, potentially testing vacuum birefringence and probing magnetic field structures.
-
X-Ray Views of Galactic Accreting Pulsars in High-Mass X-Ray Binaries
A concise review of the timing, spectral, and polarization properties of accreting X-ray pulsars in high-mass X-ray binaries, including recent IXPE results.
Discussion (0). Continue with ORCID to comment.