Cygnus X-3 revealed as a Galactic ultraluminous X-ray source by IXPE
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F24%3A00598915" target="_blank" >RIV/67985815:_____/24:00598915 - isvavai.cz</a>
Alternative codes found
RIV/00216208:11320/24:10494193
Result on the web
<a href="https://doi.org/10.1038/s41550-024-02294-9" target="_blank" >https://doi.org/10.1038/s41550-024-02294-9</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1038/s41550-024-02294-9" target="_blank" >10.1038/s41550-024-02294-9</a>
Alternative languages
Result language
angličtina
Original language name
Cygnus X-3 revealed as a Galactic ultraluminous X-ray source by IXPE
Original language description
The accretion of matter by compact objects can be inhibited by radiation pressure if the luminosity exceeds a critical value known as the Eddington limit. The discovery of ultraluminous X-ray sources has shown that accretion can proceed even when the apparent luminosity considerably exceeds this limit. A high apparent luminosity might be produced due to the geometric beaming of radiation by an outflow. The outflow half-opening angle, which determines the amplification due to beaming, has never been robustly constrained. Using the Imaging X-ray Polarimetry Explorer, we measured the X-ray polarization in the Galactic X-ray binary Cygnus X-3 (Cyg X-3). We found high, >20%, nearly energy-independent linear polarization orthogonal to the direction of the radio ejections. These properties unambiguously indicate the presence of a collimating outflow from the X-ray binary Cyg X-3 and constrain its half-opening angle to ≲15°. Thus, the source can be used as a laboratory for studying the supercritical accretion regime. This finding underscores the importance of X-ray polarimetry in advancing our understanding of accreting sources.
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
2024
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
8
Issue of the periodical within the volume
8
Country of publishing house
US - UNITED STATES
Number of pages
26
Pages from-to
1031-1046
UT code for WoS article
001411602500001
EID of the result in the Scopus database
2-s2.0-85201678621