X-ray pulsar GRO J1008-57 as an orthogonal rotator
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F23%3A00574443" target="_blank" >RIV/67985815:_____/23:00574443 - isvavai.cz</a>
Result on the web
<a href="https://hdl.handle.net/11104/0345568" target="_blank" >https://hdl.handle.net/11104/0345568</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1051/0004-6361/202346134" target="_blank" >10.1051/0004-6361/202346134</a>
Alternative languages
Result language
angličtina
Original language name
X-ray pulsar GRO J1008-57 as an orthogonal rotator
Original language description
X-ray polarimetry is a unique way to probe the geometrical configuration of highly magnetized accreting neutron stars (X-ray pulsars). GRO J1008-57 is the first transient X-ray pulsar observed at two different flux levels by the Imaging X-ray Polarimetry Explorer (IXPE) during its outburst in November 2022. We find the polarization properties of GRO J1008-57 to be independent of its luminosity, with the polarization degree varying between nondetection and about 15% over the pulse phase. Fitting the phase-resolved spectro-polarimetric data with the rotating vector model allowed us to estimate the pulsar inclination (130 & DEG, which is in good agreement with the orbital inclination), the position angle (75 & DEG) of the pulsar spin axis, and the magnetic obliquity (& SIM,74 & DEG,). This makes GRO J1008-57 the first confidently identified nearly orthogonal rotator among X-ray pulsars. We discuss our results in the context of the neutron star atmosphere models and theories of the axis alignment of accreting pulsars.
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
<a href="/en/project/GX21-06825X" target="_blank" >GX21-06825X: Accreting Black Holes in the new era of X-ray polarimetry missions</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Astronomy & Astrophysics
ISSN
0004-6361
e-ISSN
1432-0746
Volume of the periodical
675
Issue of the periodical within the volume
July
Country of publishing house
FR - FRANCE
Number of pages
11
Pages from-to
A48
UT code for WoS article
001023752300015
EID of the result in the Scopus database
2-s2.0-85164535605