NEW TIME SIGNATURES IN NEUTRON-STARS AND PULSE-HEIGHT VARIABILITY IN CRAB

OZEL M.

EUROPHYSICS LETTERS, vol.14, no.3, pp.275-280, 1991 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 14 Issue: 3
  • Publication Date: 1991
  • Doi Number: 10.1209/0295-5075/14/3/015
  • Journal Name: EUROPHYSICS LETTERS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Aerospace Database, Communication Abstracts, INSPEC, Metadex, zbMATH, Civil Engineering Abstracts
  • Page Numbers: pp.275-280
  • Çukurova University Affiliated: No

Abstract

Accumulated gamma-ray evidence on the time variability of the pulse height ratio (PHR) of the Crab pulsar is shown to be compatible with a long-term (approximately 10.7 y) periodicity and can be interpreted as the free precession of the underlying neutron star. A prediction for the value of PHR by the coming GRO-EGRET gamm-ray observations under the present model is presented.