Evidence for Free Precession in the Pulsar B1642−03 | Zendy

T. V. Shabanova | Zendy; A. G. Lyne | Zendy; J. O. Urama | Zendy

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Evidence for Free Precession in the Pulsar B1642−03

Author(s) -

T. V. Shabanova,

A. G. Lyne,

J. O. Urama

Publication year - 2001

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/320438

Subject(s) - pulsar , precession , amplitude , maxima , physics , speed wobble , interval (graph theory) , astrophysics , geodesy , span (engineering) , astronomy , geology , mathematics , classical mechanics , history , quantum mechanics , art history , combinatorics , performance art , civil engineering , engineering

We present an analysis of the timing data of the pulsar B1642-03, collectedover a span of 30 years between 1969 and 1999. During this interval, the timingresiduals exhibit cyclical changes with amplitude varying from 15 ms to 80 msand spacing of maxima varying from 3 years to 7 years. Interpretation of theseobserved cyclical changes in terms of free precession suggests a wobble angleof about 0.8 degrees.Comment: 9 pages, 5 figures. Accepted for publication in Ap

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