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.

Basic information

Original name

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

Authors

KAWKA, Adela (203 Czech Republic), Gordon BRIGGS (36 Australia), Stéphane VENNES (203 Czech Republic), Lilia FERRARIO (36 Australia), Ernst PAUNZEN (40 Austria, guarantor, belonging to the institution) and Dayal WICKRAMASINGHE (36 Australia)

Edition

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

Other information

Language

English

Type of outcome

Článek v odborném periodiku

Field of Study

10308 Astronomy

Country of publisher

United Kingdom of Great Britain and Northern Ireland

Confidentiality degree

není předmětem státního či obchodního tajemství

Impact factor

Impact factor: 5.194

RIV identification code

RIV/00216224:14310/17:00099896

Organization unit

Faculty of Science

DOI

http://dx.doi.org/10.1093/mnras/stw3149

UT WoS

000398112400078

Keywords in English

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

Abstract

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.

Links

LG15010, research and development project

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

Investor: Ministry of Education, Youth and Sports of the CR

Citovat

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.

@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.

Detailed Information on Publication Record