Noise analysis in the European Pulsar Timing Array data release 2 and its implications on the gravitational-wave background search

A. Chalumeau,S. Babak, A. Petiteau,S. Chen, A. Samajdar,R. N. Caballero,G. Theureau,L. Guillemot,G. Desvignes,A. Parthasarathy,K. Liu,G. Shaifullah,H. Hu,E. van der Wateren,J. Antoniadis,A. -S. Bak Nielsen,C. G. Bassa,A. Berthereau,M. Burgay,D. J. Champion,I. Cognard, M. Falxa,R. D. Ferdman,P. C. C. Freire,J. R. Gair, E. Graikou,Y. J. Guo,J. Jang,G. H. Janssen,R. Karuppusamy,M. J. Keith,M. Kramer,K. J. Lee,X. J. Liu,A. G. Lyne,R. A. Main,J. W. McKee, M. B. Mickaliger,B. B. P. Perera, D. Perrodin, N. K. Porayko, A. Possenti, S. A. Sanidas,A. Sesana,L. Speri,B. W. Stappers,C. Tiburzi,A. Vecchio,J. P. W. Verbiest,J. Wang,L. Wang,H. Xu

Monthly Notices of the Royal Astronomical Society（2021）

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摘要

The European Pulsar Timing Array (EPTA) collaboration has recently released an extended data set for six pulsars (DR2) and reported evidence for a common red noise signal. Here we present a noise analysis for each of the six pulsars. We consider several types of noise: (i) radio frequency independent, ‘achromatic’, and time-correlated red noise; (ii) variations of dispersion measure and scattering...

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关键词

gravitational waves,methods: data analysis,pulsars: general

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