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

J 2017

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

KAWKA, Adela; Gordon BRIGGS; Stéphane VENNES; Lilia FERRARIO; Ernst PAUNZEN et al.

Základní údaje

Originální název

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

Autoři

KAWKA, Adela; Gordon BRIGGS; Stéphane VENNES; Lilia FERRARIO; Ernst PAUNZEN a Dayal WICKRAMASINGHE

Vydání

Monthly Notices of the Royal Astronomical Society, Oxford, England, OXFORD UNIV PRESS, 2017, 0035-8711

Další údaje

Jazyk

angličtina

Typ výsledku

Článek v odborném periodiku

Obor

10308 Astronomy

Stát vydavatele

Velká Británie a Severní Irsko

Utajení

není předmětem státního či obchodního tajemství

Impakt faktor

Impact factor: 5.194

Označené pro přenos do RIV

Ano

Kód RIV

RIV/00216224:14310/17:00099896

Organizační jednotka

Přírodovědecká fakulta

Klíčová slova anglicky

binaries: close; stars: individual: NLTT 12758; stars: magnetic field; white dwarfs

Štítky

NZ, rivok

Příznaky

Mezinárodní význam, Recenzováno

Změněno: 26. 3. 2018 22:23, Ing. Nicole Zrilić

Anotace

V originále

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.

Návaznosti

LG15010, projekt VaV

Název: F. Magellanes: projekt podpory studia hvězd a hvězdných soustav na základě pozorování ze Země a z kosmického prostoru (Akronym: Magellan2015)

Investor: Ministerstvo školství, mládeže a tělovýchovy ČR, F. Magellanes: projekt podpory studia hvězd a hvězdných soustav na základě pozorování ze Země a z kosmického prostoru

Citovat

KAWKA, Adela; Gordon BRIGGS; Stéphane VENNES; Lilia FERRARIO; Ernst PAUNZEN a 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, roč. 466, č. 1, s. 1127-1139. ISSN 0035-8711. Dostupné z: https://doi.org/10.1093/mnras/stw3149.

@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 = {https://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 a 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, roč.~466, č.~1, s.~1127-1139. ISSN~0035-8711. Dostupné z: https://doi.org/10.1093/mnras/stw3149.

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