A massive white-dwarf merger product before final collapse

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F19%3A00518009" target="_blank" >RIV/67985815:_____/19:00518009 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1038/s41586-019-1216-1" target="_blank" >https://doi.org/10.1038/s41586-019-1216-1</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1038/s41586-019-1216-1" target="_blank" >10.1038/s41586-019-1216-1</a>

Result language
angličtina
Original language name
A massive white-dwarf merger product before final collapse
Original language description
Here we report observations of a hot star with a spectrum dominated by emission lines, which is located at the centre of a circular mid-infrared nebula. The widths of the emission lines imply that wind material leaves the star with an outflow velocity of 16,000 kilometres per second and that rapid stellar rotation and a strong magnetic field aid the wind acceleration. Given that hydrogen and helium are probably absent from the star and nebula, we conclude that both objects formed recently from the merger of two massive white dwarfs. Our stellar-atmosphere and wind models indicate a stellar surface temperature of about 200,000 kelvin and a luminosity of about 10(4.6) solar luminosities.
Czech name
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Czech description
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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)

Project
<a href="/en/project/GA18-05665S" target="_blank" >GA18-05665S: Mass-loss in evolved massive stars</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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