EFFECTS OF MAGNETIC FIELDS ON THE PROPAGATION OF NUCLEAR FLAMES IN MAGNETIC WHITE DWARFS

被引：3

作者：

Kutsuna, Masamichi ^{[1
,2
]}

Shigeyama, Toshikazu ^{[1
]}

机构：

[1] Univ Tokyo, Grad Sch Sci, Res Ctr Early Universe, Bunkyo Ku, Tokyo 1130033, Japan

[2] Univ Tokyo, Grad Sch Sci, Dept Astron, Bunkyo Ku, Tokyo 1130033, Japan

来源：

ASTROPHYSICAL JOURNAL | 2012年 / 749卷 / 01期

关键词：

magnetohydrodynamics (MHD); nuclear reactions; nucleosynthesis; abundances; stars: magnetic field; supernovae: general; white dwarfs; SUPERNOVAE; ORIGIN;

D O I：

10.1088/0004-637X/749/1/51

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We investigate the effects of the magnetic field on the propagation of laminar flames of nuclear reactions taking place in white dwarfs with masses close to the Chandrasekhar limit. We calculate the velocities of laminar flames parallel and perpendicular to uniform magnetic fields as eigenvalues of steady solutions for magnetic hydrodynamical equations. As a result, we find that even when the magnetic pressure does not dominate the entire pressure it is possible for the magnetic field to suppress the flame propagation through the thermal conduction. Above the critical magnetic field, the flame velocity decreases with increasing magnetic field strength as nu similar to B-1. In media with densities of 10(7), 10(8), and 10(9) g cm(-3), the critical magnetic fields are orders of similar to 10(10), 10(11), and 10(12) G, respectively.

引用

页数：6