2012/03/20 by Jingbo Wang, Na Wang, Hao Tong +2 · 2 citations
Earth and Planetary Sciences · Physics and Astronomy · #Astronomy #Astrophysics #Crab Pulsar #Geophysics and Gravity Measurements #Glitch #High-pressure geophysics and materials #Observatory #Optics #Physics #Pulsar #Pulsars and Gravitational Waves Research #Pulse (music) #Vela #astro-ph.HE
paper · pdf · doi:10.1007/s10509-012-1058-x
Accepted for publication in Astrophysics & Space Science
arxiv created 2012/03/20 · arxiv updated 2012/03/21 · openalex publication_date 2012/03/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
From 2000 to 2010, monitoring of radio emission from the Crab pulsar at Xinjiang Observatory detected a total of nine glitches. The occurrence of glitches appears to be a random process as described by previous researches. A persistent change in pulse frequency and pulse frequency derivative after each glitch was found. There is no obvious correlation between glitch sizes and the time since last glitch. For these glitches Δνp and Δνp span two orders of magnitude. The pulsar suffered the largest frequency jump ever seen on MJD 53067.1. The size of the glitch is ∼ 6.8 × 10-6 Hz, ∼ 3.5 times that of the glitch occured in 1989 glitch, with a very large permanent changes in frequency and pulse frequency derivative and followed by a decay with time constant ∼ 21 days. The braking index presents significant changes. We attribute this variation to a varying particle wind strength which may be caused by glitch activities. We discuss the properties of detected glitches in Crab pulsar and compare them with glitches in the Vela pulsar.