IS GEMINGA A GLITCHING PULSAR

被引：0
|
作者：
ALPAR, MA
OGELMAN, H
SHAHAM, J
机构：
[1] UNIV WISCONSIN, DEPT PHYS, 1150 UNIV AVE, MADISON, WI 53706 USA
[2] MIDDLE E TECH UNIV, DEPT PHYS, ANKARA 06531, TURKEY
[3] MAX PLANCK INST EXTRATERR PHYS, W-8046 GARCHING, GERMANY
[4] COLUMBIA UNIV, DEPT PHYS, NEW YORK, NY 10027 USA
[5] COLUMBIA UNIV, COLUMBIA ASTROPHYS LAB, NEW YORK, NY 10027 USA
来源：
ASTRONOMY & ASTROPHYSICS | 1993年 / 273卷 / 01期
关键词：
PULSAR GLITCHES; GEMINGA;
D O I：
暂无
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The recent discovery that Geminga is a pulsar has been followed by indications of an anomalous second derivative nu double overdot = 2.8(1.6) x 10(-25) Hz s-1 in the COS-B data, yielding a braking index n congruent-to 31 +/- 18. We propose that Geminga is a glitching pulsar with dynamical parameters similar to those of the Vela pulsar, whose interglitch behaviour is characterized by a large second derivative. With the vortex unpinning model for glitches, if we adopt the hypothesis that the number of vortices unpinned in each glitch and the moment of inertia of the crust superfluid involved in the interglitch response are the same in Geminga as in Vela, we find that the expected interglitch second derivative in Geminga agrees with that of the COS-B ephemeris.
引用
收藏
页码：L35 / L37
页数：3
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