| KAWKA, Adela, Gordon BRIGGS, Stéphane VENNES, Lilia FERRARIO, Ernst PAUNZEN and Dayal WICKRAMASINGHE. A fast spinning magnetic white dwarf in the double degenerate, super-Chandrasekhar system NLTT 12758. Monthly Notices of the Royal Astronomical Society. Oxford, England: OXFORD UNIV PRESS, 2017, vol. 466, No 1, p. 1127-1139. ISSN 0035-8711. Available from: https://dx.doi.org/10.1093/mnras/stw3149. |
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@article{1406894,
author = {Kawka, Adela and Briggs, Gordon and Vennes, Stéphane and Ferrario, Lilia and Paunzen, Ernst and Wickramasinghe, Dayal},
article_location = {Oxford, England},
article_number = {1},
doi = {http://dx.doi.org/10.1093/mnras/stw3149},
keywords = {binaries: close; stars: individual: NLTT 12758; stars: magnetic field; white dwarfs},
language = {eng},
issn = {0035-8711},
journal = {Monthly Notices of the Royal Astronomical Society},
title = {A fast spinning magnetic white dwarf in the double degenerate, super-Chandrasekhar system NLTT 12758},
volume = {466},
year = {2017}
}
TY - JOUR
ID - 1406894
AU - Kawka, Adela - Briggs, Gordon - Vennes, Stéphane - Ferrario, Lilia - Paunzen, Ernst - Wickramasinghe, Dayal
PY - 2017
TI - A fast spinning magnetic white dwarf in the double degenerate, super-Chandrasekhar system NLTT 12758
JF - Monthly Notices of the Royal Astronomical Society
VL - 466
IS - 1
SP - 1127-1139
EP - 1127-1139
PB - OXFORD UNIV PRESS
SN - 00358711
KW - binaries: close
KW - stars: individual: NLTT 12758
KW - stars: magnetic field
KW - white dwarfs
N2 - 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.
ER -
KAWKA, Adela, Gordon BRIGGS, Stéphane VENNES, Lilia FERRARIO, Ernst PAUNZEN and Dayal WICKRAMASINGHE. A fast spinning magnetic white dwarf in the double degenerate, super-Chandrasekhar system NLTT 12758. \textit{Monthly Notices of the Royal Astronomical Society}. Oxford, England: OXFORD UNIV PRESS, 2017, vol.~466, No~1, p.~1127-1139. ISSN~0035-8711. Available from: https://dx.doi.org/10.1093/mnras/stw3149.
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