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IXPE Observations of the Quintessential Wind-accreting X-Ray Pulsar Vela X-1

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F23%3A00572125" target="_blank" >RIV/67985815:_____/23:00572125 - isvavai.cz</a>

  • Result on the web

    <a href="https://hdl.handle.net/11104/0342978" target="_blank" >https://hdl.handle.net/11104/0342978</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.3847/2041-8213/acc391" target="_blank" >10.3847/2041-8213/acc391</a>

Alternative languages

  • Result language

    angličtina

  • Original language name

    IXPE Observations of the Quintessential Wind-accreting X-Ray Pulsar Vela X-1

  • Original language description

    The radiation from accreting X-ray pulsars was expected to be highly polarized, with some estimates for the polarization degree of up to 80%. However, phase-resolved and energy-resolved polarimetry of X-ray pulsars is required in order to test different models and to shed light on the emission processes and the geometry of the emission region. Here we present the first results of the observations of the accreting X-ray pulsar Vela X-1 performed with the Imaging X-ray Polarimetry Explorer. Vela X-1 is considered to be the archetypal example of a wind-accreting, high-mass X-ray binary system, consisting of a highly magnetized neutron star accreting matter from its supergiant stellar companion. The spectropolarimetric analysis of the phase-averaged data for Vela X-1 reveals a polarization degree (PD) of 2.3% +/- 0.4% at the polarization angle (PA) of47.degrees 3 +/- 5.degrees 4. A low PD is consistent with the results obtained for other X-ray pulsars and is likely related to the inverse temperature structure of the neutron star atmosphere. The energy-resolved analysis shows the PD above 5 keV reaching 6%-10% and a similar to 90 degrees difference in the PA compared to the data in the 2-3 keV range. The phase-resolved spectropolarimetric analysis finds a PD in the range 0%-9% with the PA varying between80 degrees and 40 degrees.

  • 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

  • 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

    Astrophysical Journal Letters

  • ISSN

    2041-8205

  • e-ISSN

    2041-8213

  • Volume of the periodical

    947

  • Issue of the periodical within the volume

    2

  • Country of publishing house

    US - UNITED STATES

  • Number of pages

    10

  • Pages from-to

    L20

  • UT code for WoS article

    000976739200001

  • EID of the result in the Scopus database

    2-s2.0-85158131320