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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

  • Czech description

Classification

  • Type

    J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database

  • CEP classification

  • 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