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ON THE RELAXATION BEHAVIORS OF SLOW AND CLASSICAL GLITCHES: OBSERVATIONAL BIASES AND THEIR OPPOSITE RECOVERY TRENDS
Xie, Y; Zhang SN(张双南); Zhang, SN
2013
Source PublicationASTROPHYSICAL JOURNAL
ISSN0004-637X
EISSN1538-4357
Volume778Issue:1Pages:31
AbstractWe study the pulsar timing properties and the data analysis methods of glitch recoveries. In some cases one first fits the times of arrival (TOAs) to obtain the "time-averaged" frequency. and its first derivative.., and then fits models to them. However, our simulations show that. and. obtained in this way are systematically biased unless the time intervals between the nearby data points of TOAs are smaller than about 10(4) s, which is much shorter than typical observation intervals. Alternatively, glitch parameters can be obtained by fitting the phases directly with relatively smaller biases, but the initial recovery time scale is usually chosen by eye, which may introduce a strong bias. We also construct a phenomenological model by assuming a pulsar spin-down law of (nu) over dot nu(-3) = -H(0)G(t) with G(t) = 1 + kappa e(-t/iota) for a glitch recovery, where H-0 is a constant and. and t are the glitch parameters to be found. This model can reproduce the observed data of slow glitches from B1822-09 and the giant classical glitch of B2334+61, with kappa < 0 or kappa > 0, respectively. We then use this model to simulate TOA data and test several fitting procedures for a glitch recovery. The best procedure is (1) to use a very high order polynomial (e. g., to 50th order) to precisely describe the phase, (2) obtain.(t) and..(t) from the polynomial, then (3) obtain the glitch parameters from nu(t) or (nu) over dot (t). Finally, the uncertainty in the starting time t(0) of a classical glitch causes uncertainties in some glitch parameters, but less so for a slow glitch, t(0), of which can be determined from data.
Keywordmagnetic fields pulsars: general pulsars: individual (B1822-09, B2334+61) stars: neutron
Subject AreaAstronomy & Astrophysics
DOI10.1088/0004-637X/778/1/31
Indexed BySCI ; INSPIREHEP ; ADS
Language英语
WOS IDWOS:000327131700031
ADS Bibcode2013ApJ...778...31X
ADS URLhttps://ui.adsabs.harvard.edu/abs/2013ApJ...778...31X
ADS CITATIONShttps://ui.adsabs.harvard.edu/abs/2013ApJ...778...31X/citations
inspireid1253532
inspireURLhttps://inspirehep.net/literature/1253532
Citation statistics
Cited Times:3 [INSPIRE]
Cited Times:5 [ADS]
Document Type期刊论文
Identifierhttp://ir.ihep.ac.cn/handle/311005/224390
Collection粒子天体物理中心
Recommended Citation
GB/T 7714
Xie, Y,Zhang SN,Zhang, SN. ON THE RELAXATION BEHAVIORS OF SLOW AND CLASSICAL GLITCHES: OBSERVATIONAL BIASES AND THEIR OPPOSITE RECOVERY TRENDS[J]. ASTROPHYSICAL JOURNAL,2013,778(1):31.
APA Xie, Y,张双南,&Zhang, SN.(2013).ON THE RELAXATION BEHAVIORS OF SLOW AND CLASSICAL GLITCHES: OBSERVATIONAL BIASES AND THEIR OPPOSITE RECOVERY TRENDS.ASTROPHYSICAL JOURNAL,778(1),31.
MLA Xie, Y,et al."ON THE RELAXATION BEHAVIORS OF SLOW AND CLASSICAL GLITCHES: OBSERVATIONAL BIASES AND THEIR OPPOSITE RECOVERY TRENDS".ASTROPHYSICAL JOURNAL 778.1(2013):31.
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