DOUBLE DEGENERATE MERGERS AS PROGENITORS OF HIGH-FIELD MAGNETIC WHITE DWARFS

被引：116

作者：

Garcia-Berro, Enrique ^{[1
,2
]}

Loren-Aguilar, Pablo ^{[1
,2
]}

Aznar-Siguan, Gabriela ^{[1
,2
]}

Torres, Santiago ^{[1
,2
]}

Camacho, Judit ^{[1
,2
]}

Althaus, Leandro G. ^{[3
,4
]}

Corsico, Alejandro H. ^{[3
,4
]}

Kuelebi, Baybars ^{[2
,5
]}

Isern, Jordi ^{[2
,5
]}

机构：

[1] Univ Politecn Cataluna, Dept Fis Aplicada, Castelldefels 08860, Spain

[2] Inst Space Studies Catalonia, Barcelona 08034, Spain

[3] Univ Nacl La Plata, Fac Ciencias Astron & Geofis, RA-1900 La Plata, Argentina

[4] Consejo Nacl Invest Cient & Tecn, Inst Astrofis La Plata, IALP CCT La Plata, La Plata, Buenos Aires, Argentina

[5] CSIC, Inst Ciencies Espai, Fac Ciencias, Bellaterra 08193, Spain

来源：

ASTROPHYSICAL JOURNAL | 2012年 / 749卷 / 01期

关键词：

binaries: general; stars: evolution; stars: interiors; stars: magnetic field; stars: rotation; white dwarfs; PARTICLE HYDRODYNAMICS SIMULATIONS; COMMON-ENVELOPE BINARIES; MONTE-CARLO SIMULATIONS; ASYMPTOTIC-GIANT-BRANCH; CORONAE-BOREALIS STARS; LOW-MASS; ZEEMAN TOMOGRAPHY; IA SUPERNOVAE; EVOLUTION; ORIGIN;

D O I：

10.1088/0004-637X/749/1/25

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

High-field magnetic white dwarfs have been long suspected to be the result of stellar mergers. However, the nature of the coalescing stars and the precise mechanism that produces the magnetic field are still unknown. Here, we show that the hot, convective, differentially rotating corona present in the outer layers of the remnant of the merger of two degenerate cores can produce magnetic fields of the required strength that do not decay for long timescales. Using a state-of-the-art Monte Carlo simulator, we also show that the expected number of high-field magnetic white dwarfs produced in this way is consistent with that found in the solar neighborhood.

引用

页数：5

共 50 条

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