THE MISSING LINK: MERGING NEUTRON STARS NATURALLY PRODUCE JET-LIKE STRUCTURES AND CAN POWER SHORT GAMMA-RAY BURSTS

被引：372

作者：

Rezzolla, Luciano ^{[1
]}

Giacomazzo, Bruno ^{[2
,3
]}

Baiotti, Luca ^{[4
]}

Granot, Jonathan ^{[5
]}

Kouveliotou, Chryssa ^{[6
]}

Aloy, Miguel A. ^{[7
]}

机构：

[1] Albert Einstein Inst, Max Planck Inst Gravitat Phys, Potsdam, Germany

[2] Univ Maryland, Dept Astron, College Pk, MD 20742 USA

[3] NASA, Goddard Space Flight Ctr, Gravitat Astrophys Lab, Greenbelt, MD 20771 USA

[4] Osaka Univ, Inst Laser Engn, Suita, Osaka 565, Japan

[5] Univ Hertfordshire, Ctr Astrophys Res, Hatfield AL10 9AB, Herts, England

[6] NASA, George C Marshall Space Flight Ctr, VP62, Space Sci Off, Huntsville, AL 35812 USA

[7] Univ Valencia, Dept Astron & Astrofis, E-46100 Burjassot, Valencia, Spain

来源：

ASTROPHYSICAL JOURNAL LETTERS | 2011年 / 732卷 / 01期

基金：

欧洲研究理事会;

关键词：

black hole physics; gamma-ray burst: general; gravitational waves; magnetohydrodynamics (MHD); methods: numerical; stars: neutron; AFTERGLOW LIGHT CURVES; FERMI OBSERVATIONS; BLACK-HOLES; INSTABILITY; SWIFT; ACCELERATION; COMPONENT; ENERGY; GALAXY;

D O I：

10.1088/2041-8205/732/1/L6

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Short gamma-ray bursts (SGRBs) are among the most luminous explosions in the universe, releasing in less than one second the energy emitted by our Galaxy over one year. Despite decades of observations, the nature of their "central engine" remains unknown. Considering a binary of magnetized neutron stars and solving the Einstein equations, we show that their merger results in a rapidly spinning black hole surrounded by a hot and highly magnetized torus. Lasting over 35 ms and much longer than previous simulations, our study reveals that magnetohydrodynamical instabilities amplify an initially turbulent magnetic field of similar to 10(12) G to produce an ordered poloidal field of similar to 10(15) G along the black hole spin axis, within a half-opening angle of similar to 30 degrees, which may naturally launch a relativistic jet. The broad consistency of our ab initio calculations with SGRB observations shows that the merger of magnetized neutron stars can provide the basic physical conditions for the central engine of SGRBs.

引用

页数：6

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