A UNIFIED MODEL OF NEUTRON-STAR MAGNETIC-FIELDS

被引:190
作者
ROMANI, RW
机构
关键词
D O I
10.1038/347741a0
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
STRONGLY magnetized neutron stars are believed to be at the heart of a number of astrophysical systems, notably pulsars and X-ray binaries. Although the magnetic field is an important determinant in the behaviour of such systems, the origin and stability of the field is the subject of conflicting observational and theoretical evidence. Here I describe a new model of neutron-star magnetic moments, by which the fields are generated as the neutron star is born, and follow the evolution of the field over a Hubble time. With realistic thermal evolution and conductivities, isolated neutron stars will maintain large magnetic fields for more than 1010 years. In addition, I show how mass accretion on to neutron stars can reduce the field strength1,2. This model of field generation and decay can explain a wide variety of observed systems. © 1990 Nature Publishing Group.
引用
收藏
页码:741 / 743
页数:3
相关论文
共 23 条
[1]   THE ORIGIN OF PULSAR VELOCITIES AND THE VELOCITY-MAGNETIC MOMENT CORRELATION [J].
BAILES, M .
ASTROPHYSICAL JOURNAL, 1989, 342 (02) :917-927
[2]   GROUND STATE OF MATTER AT HIGH DENSITIES - EQUATION OF STATE AND STELLAR MODELS [J].
BAYM, G ;
PETHICK, C ;
SUTHERLAND, P .
ASTROPHYSICAL JOURNAL, 1971, 170 (02) :299-+
[3]   ELECTRICAL CONDUCTIVITY OF NEUTRON STAR MATTER [J].
BAYM, G ;
PETHICK, C ;
PINES, D .
NATURE, 1969, 224 (5220) :674-&
[4]   ON THE INTERPRETATION OF PULSAR BRAKING INDEXES [J].
BLANDFORD, RD ;
ROMANI, RW .
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1988, 234 (03) :P57-P60
[5]   THERMAL ORIGIN OF NEUTRON STAR MAGNETIC-FIELDS [J].
BLANDFORD, RD ;
APPLEGATE, JH ;
HERNQUIST, L .
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1983, 204 (03) :1025-1048
[6]   IS THE 1.5-MS PULSAR A YOUNG NEUTRON-STAR [J].
BLONDIN, JM ;
FREESE, K .
NATURE, 1986, 323 (6091) :786-788
[7]  
BUCHLER JR, 1971, Z ASTROPHYS LETT, V7, P167
[8]  
DEKOOL M, 1986, ASTRON ASTROPHYS, V173, P279
[9]   EVOLUTION OF PULSAR MAGNETIC-FIELDS [J].
FLOWERS, E ;
RUDERMAN, MA .
ASTROPHYSICAL JOURNAL, 1977, 215 (01) :302-310
[10]   TRANSPORT PROPERTIES OF DENSE MATTER [J].
FLOWERS, E ;
ITOH, N .
ASTROPHYSICAL JOURNAL, 1976, 206 (01) :218-242