A fast spinning magnetic white dwarf in the double degenerate, super-Chandrasekhar system NLTT 12758

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F17%3A00479176" target="_blank" >RIV/67985815:_____/17:00479176 - isvavai.cz</a>
Alternative codes found
RIV/00216224:14310/17:00099896
Result on the web
<a href="http://dx.doi.org/10.1093/mnras/stw3149" target="_blank" >http://dx.doi.org/10.1093/mnras/stw3149</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1093/mnras/stw3149" target="_blank" >10.1093/mnras/stw3149</a>

Result language
angličtina
Original language name
A fast spinning magnetic white dwarf in the double degenerate, super-Chandrasekhar system NLTT 12758
Original language description
We present an analysis of the close double degenerate NLTT 12758, which is comprised of a magnetic white dwarf with a field of about 3.1 MG and an apparently non-magnetic white dwarf. We measured an orbital period of 1.154 d and found that the magnetic white dwarf is spinning around its axis with a period of 23 min. An analysis of the atmospheric parameters has revealed that the cooling ages of the two white dwarfs are comparable, suggesting that they formed within a short period of time from each other. Our modelling indicates that the non-magnetic white dwarf is more massive (M = 0.83M(circle dot)) than its magnetic companion (M = 0.69M(circle dot)) and that the total mass of the system is higher than the Chandrasekhar mass. Although the stars will not come into contact over a Hubble time, when they do come into contact, dynamically unstable mass transfer will take place leading to either an accretion induced collapse into a rapidly spinning neutron star or a Type Ia supernova.
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
—
OECD FORD branch
10308 - Astronomy (including astrophysics,space science)

Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2017
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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