Matches in SemOpenAlex for { <https://semopenalex.org/work/W4280553397> ?p ?o ?g. }
- W4280553397 endingPage "4119" @default.
- W4280553397 startingPage "4111" @default.
- W4280553397 abstract "It has been recently suggested that white dwarfs generate magnetic fields in a process analogous to the Earth. The crystallization of the core creates a compositional inversion that drives convection, and combined with rotation, this can sustain a magnetic dynamo. We reanalyse the dynamo mechanism, arising from the slow crystallization of the core, and find convective turnover times $t_{rm conv}$ of weeks to months - longer by orders of magnitude than previously thought. With white dwarf spin periods $Pll t_{rm conv}$, crystallization-driven dynamos are almost always in the fast rotating regime, where the magnetic field $B$ is at least in equipartition with the convective motion and is possibly further enhanced by a factor of $Bpropto (t_{rm conv}/P)^{1/2}$, depending on the assumed dynamo scaling law. We track the growth of the crystallized core using MESA and compute the magnetic field $B(T_{rm eff})$ as a function of the white dwarf's effective temperature $T_{rm eff}$. We compare this prediction with observations and show that crystallization-driven dynamos can explain some - but not all - of the $sim$MG magnetic fields measured for single white dwarfs, as well as the stronger fields measured for white dwarfs in cataclysmic variables, which were spun up by mass accretion to short $P$. Our $B(T_{rm eff})$ curves might also explain the clustering of white dwarfs with Balmer emission lines around $T_{rm eff}approx 7500textrm{ K}$." @default.
- W4280553397 created "2022-05-22" @default.
- W4280553397 creator A5023276561 @default.
- W4280553397 creator A5032665856 @default.
- W4280553397 creator A5039514966 @default.
- W4280553397 creator A5076457623 @default.
- W4280553397 date "2022-05-16" @default.
- W4280553397 modified "2023-10-16" @default.
- W4280553397 title "Slow convection and fast rotation in crystallization-driven white dwarf dynamos" @default.
- W4280553397 cites W1515675433 @default.
- W4280553397 cites W1645326207 @default.
- W4280553397 cites W1972327366 @default.
- W4280553397 cites W1986765423 @default.
- W4280553397 cites W1992596970 @default.
- W4280553397 cites W1997711888 @default.
- W4280553397 cites W1999536114 @default.
- W4280553397 cites W2000452302 @default.
- W4280553397 cites W2002153902 @default.
- W4280553397 cites W2006124034 @default.
- W4280553397 cites W2006489654 @default.
- W4280553397 cites W2010802074 @default.
- W4280553397 cites W2021211531 @default.
- W4280553397 cites W2025783693 @default.
- W4280553397 cites W2028236644 @default.
- W4280553397 cites W2037690130 @default.
- W4280553397 cites W2038518087 @default.
- W4280553397 cites W2041270450 @default.
- W4280553397 cites W2041984726 @default.
- W4280553397 cites W2042787847 @default.
- W4280553397 cites W2050756326 @default.
- W4280553397 cites W2061045907 @default.
- W4280553397 cites W2064721749 @default.
- W4280553397 cites W2066746890 @default.
- W4280553397 cites W2066945211 @default.
- W4280553397 cites W2067965252 @default.
- W4280553397 cites W2068478755 @default.
- W4280553397 cites W2074959685 @default.
- W4280553397 cites W2084335350 @default.
- W4280553397 cites W2088881159 @default.
- W4280553397 cites W2093989665 @default.
- W4280553397 cites W2100595541 @default.
- W4280553397 cites W2121415965 @default.
- W4280553397 cites W2136976140 @default.
- W4280553397 cites W2142570384 @default.
- W4280553397 cites W2151091644 @default.
- W4280553397 cites W2164393310 @default.
- W4280553397 cites W2171577882 @default.
- W4280553397 cites W2171762844 @default.
- W4280553397 cites W2180036313 @default.
- W4280553397 cites W2293534748 @default.
- W4280553397 cites W2307374977 @default.
- W4280553397 cites W2588826510 @default.
- W4280553397 cites W2669652692 @default.
- W4280553397 cites W2738630766 @default.
- W4280553397 cites W2767058944 @default.
- W4280553397 cites W2900082529 @default.
- W4280553397 cites W2918550948 @default.
- W4280553397 cites W2932295545 @default.
- W4280553397 cites W2949477719 @default.
- W4280553397 cites W2980958929 @default.
- W4280553397 cites W2990630540 @default.
- W4280553397 cites W3015004314 @default.
- W4280553397 cites W3088067657 @default.
- W4280553397 cites W3097976388 @default.
- W4280553397 cites W3098312185 @default.
- W4280553397 cites W3098659977 @default.
- W4280553397 cites W3098955991 @default.
- W4280553397 cites W3099383823 @default.
- W4280553397 cites W3103999057 @default.
- W4280553397 cites W3104104790 @default.
- W4280553397 cites W3105110456 @default.
- W4280553397 cites W3133757340 @default.
- W4280553397 cites W3157858402 @default.
- W4280553397 cites W3164683846 @default.
- W4280553397 cites W3165392168 @default.
- W4280553397 cites W3175852863 @default.
- W4280553397 cites W4210872909 @default.
- W4280553397 doi "https://doi.org/10.1093/mnras/stac1363" @default.
- W4280553397 hasPublicationYear "2022" @default.
- W4280553397 type Work @default.
- W4280553397 citedByCount "13" @default.
- W4280553397 countsByYear W42805533972022 @default.
- W4280553397 countsByYear W42805533972023 @default.
- W4280553397 crossrefType "journal-article" @default.
- W4280553397 hasAuthorship W4280553397A5023276561 @default.
- W4280553397 hasAuthorship W4280553397A5032665856 @default.
- W4280553397 hasAuthorship W4280553397A5039514966 @default.
- W4280553397 hasAuthorship W4280553397A5076457623 @default.
- W4280553397 hasBestOaLocation W42805533971 @default.
- W4280553397 hasConcept C105094362 @default.
- W4280553397 hasConcept C10899652 @default.
- W4280553397 hasConcept C115260700 @default.
- W4280553397 hasConcept C121332964 @default.
- W4280553397 hasConcept C135757623 @default.
- W4280553397 hasConcept C150846664 @default.
- W4280553397 hasConcept C197445014 @default.
- W4280553397 hasConcept C2776401274 @default.
- W4280553397 hasConcept C44870925 @default.