Search for ultra-long gravitational waves in pulsars' rotational parameters

Details Search for ultra-long gravitational waves in pulsars' rotational parameters Search for ultra-long gravitational waves in pulsars' rotational parameters

Nov 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010hia....15..231p&link_type=abstract

Highlights of Astronomy, Volume 15, p. 231-231

Astronomy and Astrophysics

Astronomy

Gravitational Waves, (Stars:) Pulsars: General, Methods: Data Analysis

Scientific paper

A method is suggested to explore the gravitational wave background (GWB) in the frequency range from 10-12 to 10-8 Hz. That method is based on the precise measurements of pulsars' rotational parameters: the influence of the gravitational waves (GW) in the range will affect them and therefore some conclusions about energy density of the GWB can be made using analysis of the derivatives of pulsars' rotational frequency. The calculated values of the second derivative from a number of pulsars limit the density of GWB Ωgw as follows: Ωgwh2 < 10-6. Also, the time series of the frequency ν of different pulsars in pulsar array can be cross-correlated pairwise in the same manner as in anomalous residuals analysis thus providing the possibility of GWB detection in ultra-low frequency range.

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