X-Ray polarimetry of the dipping accreting neutron star 4U 1624-49
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F24%3A00584790" target="_blank" >RIV/67985815:_____/24:00584790 - isvavai.cz</a>
Result on the web
<a href="https://hdl.handle.net/11104/0353668" target="_blank" >https://hdl.handle.net/11104/0353668</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.3847/1538-4357/ad235a" target="_blank" >10.3847/1538-4357/ad235a</a>
Alternative languages
Result language
angličtina
Original language name
X-Ray polarimetry of the dipping accreting neutron star 4U 1624-49
Original language description
We present the first X-ray polarimetric study of the dipping accreting neutron star 4U 1624-49 with the Imaging X-ray Polarimetry Explorer. We report a detection of polarization in the nondip time intervals with a confidence level of 99.99%. We find an average polarization degree (PD) of 3.1% +/- 0.7% and a polarization angle of 81 degrees +/- 6 degrees east of north in the 2-8 keV band. We report an upper limit on the PD of 22% during the X-ray dips with 95% confidence. The PD increases with energy, reaching from 3.0% +/- 0.9% in the 4-6 keV band to 6% +/- 2% in the 6-8 keV band. This indicates the polarization likely arises from Comptonization. The high PD observed is unlikely to be produced by Comptonization in the boundary layer or spreading layer alone. It can be produced by the addition of an extended geometrically thin slab corona covering part of the accretion disk, as assumed in previous models of dippers, and/or a reflection component from the accretion disk.
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
2024
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
ISSN
0004-637X
e-ISSN
1538-4357
Volume of the periodical
963
Issue of the periodical within the volume
2
Country of publishing house
GB - UNITED KINGDOM
Number of pages
11
Pages from-to
133
UT code for WoS article
001184955400001
EID of the result in the Scopus database
2-s2.0-85187521328