TIMING PROPERTIES OF PSR 1951+32 IN THE CTB-80 SUPERNOVA REMNANT

被引:22
作者
FOSTER, RS
BACKER, DC
WOLSZCZAN, A
机构
[1] UNIV CALIF BERKELEY,RADIO ASTRON LAB,BERKELEY,CA 94720
[2] ARECIBO OBSERV,NATL ASTRON & IONOSPHERE CTR,ARECIBO,PR 00612
关键词
Nebulae: individual (CTB 80); Nebulae: supernova remnants; Pulsars;
D O I
10.1086/168835
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
Timing observations of PSR 1951 + 32, the 39.5 ms pulsar found in the CTB 80 supernova remnant, have detected a spin-up in the rotation rate of the neutron star. The fractional change in the rotational frequency of 2.1 × 10-9 was accompanied by a fractional change in the frequency derivative of -1.9 × 10-4 which has persisted for 1 yr after the event. Updated VLA astrometric observations of the pulsar are presented. Dispersion measure variations have been measured between 430 MHz and 1400 MHz at the level of 0.02 pc cm-3. Together, dispersion measure fluctuations and diffractive scintillations indicate a power-law electron density turbulence spectrum on scale sizes of 109-14 cm that may be relevant to cosmic-ray propagation.
引用
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页码:243 / 249
页数:7
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