Cyclical Changes in the Timing Residuals from the Pulsar B0919+06

Abstract

We report the detection of a large glitch in the pulsar B0919+06 (J0922+0638). The glitch occurred in 2009 November 5 (MJD 55140) and was characterized by a fractional increase in the rotation frequency of Deltanu/nu=1.3x10^{-6}. A large glitch happens in the pulsar whose rotation has unstable character. We present the results of the analysis of the rotation behavior of this pulsar over the 30-year time span from 1979 to 2009. These results show that the pulsar's rotation frequency underwent continuous, slow oscillations which look like glitch-like events. During the 1991-2009 interval, the pulsar experienced a continuous sequence of 12 slow glitches with a fractional increase in the rotation frequency Deltanu/nu=1.5x10^{-9}. All the slow glitches observed have a similar signature related to a slow increase in the rotation frequency during 200 days and the subsequent relaxation back to the pre-glitch value during 400 days. We show that a continuous sequence of such slow glitches is characterized by practically identical amplitudes equal to Deltanu=3.5x10^{-9} Hz and identical time intervals between glitches of about 600 days and is well described by a periodic sawtooth-like function. The detection of two different phenomena, such as a large glitch and a sequence of slow glitches, indicates the presence of two types of discontinuities in the rotation frequency of the pulsar B0919+06. These discontinuities can be classified as normal and slow glitches.

24 pages, 5 figures. Submitted to ApJ

References in corpus (3)

• An analysis of the timing irregularities for 366 pulsars
• Slow glitches in the pulsar B1822-09
• Nature of cyclical changes in the timing residuals from the pulsar B1642-03

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• Understanding the spin-down rate changes of PSR B0919+06
• Quasi-Periodicities in the Anomalous Emission Events in Pulsars B1859+07 and B0919+06
• Multifrequency behaviour of the anomalous events of PSR J0922+0638
• The ORT and the uGMRT Pulsar Monitoring Program : Pulsar Timing Irregularities & the Gaussian Process Realization
• Long-term rotational and emission variability of 17 radio pulsars
• Timing results of 22 years for PSR J0922+0638