Pulsar timing. III - Timing noise of 50 pulsars
1980; IOP Publishing; Volume: 239; Linguagem: Inglês
10.1086/158150
ISSN1538-4357
Autores Tópico(s)Advanced Frequency and Time Standards
Resumoview Abstract Citations (165) References (18) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Pulsar timing .III. Timing noise of 50 pulsars. Cordes, J. M. ; Helfand, D. J. Abstract An examination of the timing behavior of 50 pulsars has shown that timing activity is more than 50% correlated with pulsar period derivative, weakly correlated with period, and uncorrelated with radio luminosity, galactic altitude, and other source parameters. An upper limit is placed on the timing noise for the binary pulsar PSR 1913 + 16 that is consistent with its small period derivative. A detailed analysis of 11 pulsars indicates that random walks in the rotational phase (2 objects), frequency (4-7 objects), and frequency derivative (2 objects) are consistent with the data. Timing activity in general (apart from pulse shape changes and the glitches of the Crab and Vela pulsars and PSR 1641-45) appears to be consistent with a random walk origin. It is shown explicitly that the frequency second derivatives (apart from that of the Crab pulsar) and apparent steps in frequency that have been reported for some pulsars are probable manifestations of random walk processes. Publication: The Astrophysical Journal Pub Date: July 1980 DOI: 10.1086/158150 Bibcode: 1980ApJ...239..640C Keywords: Periodic Variations; Pulsars; Stellar Rotation; Time Response; Astronomical Catalogs; Extremum Values; Random Walk; Statistical Correlation; Astrophysics full text sources ADS | data products SIMBAD (51)
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