Details

Autor(en) / Beteiligte

• Zhou, S. Q.
• Zhou, A. A.
• Zhang, J.
• Liu, M. Q.
• Liu, H. Y.
• Zhang, L.
• Feng, Z. W.
• Zhu, X. D.
• Wu, D.

Titel

A very large slow glitch in PSR J1602–5100

Ist Teil von

• Astrophysics and space science, 2019-10, Vol.364 (10), p.1-6, Article 173

Ort / Verlag

Dordrecht: Springer Netherlands

Erscheinungsjahr

2019

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• We present a timing analysis of PSR J1602–5100 using approximately seven years of observations from the Parkes 64-m radio telescope. A slow glitch that occurred between 2008 September 24 and 2010 May 14 (MJDs 54733 and 55330) is identified. During this time, the pulsar showed a slow exponential growth in the spin frequency ν , and the spin-down rate | ν ˙ | suddenly decreased to a peak value, followed by a linear return to its initial value. Our measurements of the maximum Δ ν and Δ ν ˙ are 176 nHz and 3.58 × 10 − 15 s − 2 , corresponding to fractional sizes of 152 × 10 − 9 ( Δ ν / ν ) and − 38.6 × 10 − 3 ( Δ ν ˙ / ν ˙ ) , respectively. This is the largest slow glitch observed so far. Moreover, more complex changes in the shape of the pulse profile are considered to be associated with this unusual glitch activity.