Počet záznamů: 1
A fast spinning magnetic white dwarf in the double degenerate, super-Chandrasekhar system NLTT 12758
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SYSNO ASEP 0479176 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název A fast spinning magnetic white dwarf in the double degenerate, super-Chandrasekhar system NLTT 12758 Tvůrce(i) Kawka, Adela (ASU-R) ORCID, RID
Briggs, G. (AU)
Vennes, Stephane (ASU-R) ORCID, RID
Ferrario, L. (AU)
Paunzen, E. (CZ)
Wickramasinghe, D.T. (AU)Zdroj.dok. Monthly Notices of the Royal Astronomical Society. - : Oxford University Press - ISSN 0035-8711
Roč. 466, č. 1 (2017), s. 1127-1139Poč.str. 13 s. Forma vydání Tištěná - P Jazyk dok. eng - angličtina Země vyd. GB - Velká Británie Klíč. slova close binaries ; NLTT 12758 ; magnetic field Vědní obor RIV BN - Astronomie a nebeská mechanika, astrofyzika Obor OECD Astronomy (including astrophysics,space science) CEP GAP209/12/0217 GA ČR - Grantová agentura ČR GA15-15943S GA ČR - Grantová agentura ČR LG14013 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy LG15010 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy Institucionální podpora ASU-R - RVO:67985815 UT WOS 000398112400078 EID SCOPUS 85018239838 DOI 10.1093/mnras/stw3149 Anotace 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. Pracoviště Astronomický ústav Kontakt Radka Svašková, bibl@asu.cas.cz, Tel.: 323 620 326 Rok sběru 2018
Počet záznamů: 1