Determination of X-ray pulsar geometry with IXPE polarimetry
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F22%3A00566628" target="_blank" >RIV/67985815:_____/22:00566628 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1038/s41550-022-01799-5" target="_blank" >https://doi.org/10.1038/s41550-022-01799-5</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1038/s41550-022-01799-5" target="_blank" >10.1038/s41550-022-01799-5</a>
Alternative languages
Result language
angličtina
Original language name
Determination of X-ray pulsar geometry with IXPE polarimetry
Original language description
Using observations of X-ray pulsar Hercules X-1 by the Imaging X-ray Polarimetry Explorer we report a highly significant (>17σ) detection of the polarization signal from an accreting neutron star. The observed degree of linear polarization of ~10% is far below theoretical expectations for this object, and stays low throughout the spin cycle of the pulsar. Both the degree and angle of polarization exhibit variability with the pulse phase, allowing 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 ~20 deg, which is a strong argument in support of the models explaining the stability of the observed superorbital variability with the precession of the neutron star.n
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10308 - Astronomy (including astrophysics,space science)
Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Nature Astronomy
ISSN
2397-3366
e-ISSN
2397-3366
Volume of the periodical
6
Issue of the periodical within the volume
12
Country of publishing house
DE - GERMANY
Number of pages
11
Pages from-to
1433-1443
UT code for WoS article
000871277600003
EID of the result in the Scopus database
2-s2.0-85140394236