DOES A “STOCHASTIC” BACKGROUND OF GRAVITATIONAL WAVES EXIST IN THE PULSAR TIMING BAND?

@article{Ravi2012DOESA,
  title={DOES A “STOCHASTIC” BACKGROUND OF GRAVITATIONAL WAVES EXIST IN THE PULSAR TIMING BAND?},
  author={Vikram Ravi and J. S. B. Wyithe and George Hobbs and Ryan M. Shannon and Richard N. Manchester and D. R. B. Yardley and Michael J. Keith},
  journal={The Astrophysical Journal},
  year={2012},
  volume={761}
}
We investigate the effects of gravitational waves (GWs) from a simulated population of binary supermassive black holes (SMBHs) on pulsar timing array data sets. We construct a distribution describing the binary SMBH population from an existing semi-analytic galaxy formation model. Using realizations of the binary SMBH population generated from this distribution, we simulate pulsar timing data sets with GW-induced variations. We find that the statistics of these variations do not correspond to… 

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References

SHOWING 1-10 OF 48 REFERENCES
On detection of the stochastic gravitational-wave background using the Parkes pulsar timing array
We search for the signature of an isotropic stochastic gravitational-wave background in pulsar timing observations using a frequency-domain correlation technique. These observations, which span
The stochastic gravitational-wave background from massive black hole binary systems: implications for observations with Pulsar Timing Arrays
Massive black hole binary systems, with masses in the range � 10 4 10 10 M⊙, are among the primary sources of gravitational waves in the frequency window � 10 −9 Hz 0.1Hz. Pulsar Timing Arrays (PTAs)
PULSAR TIMING ARRAY OBSERVATIONS OF MASSIVE BLACK HOLE BINARIES
Pulsar timing is a promising technique for detecting low frequency sources of gravitational waves. Historically the focus has been on the detection of diffuse stochastic backgrounds, such as those
On measuring the gravitational-wave background using Pulsar Timing Arrays
Long-term precise timing of Galactic millisecond pulsars holds great promise for measuring the long-period (months-to-years) astrophysical gravitational waves. Several gravitational-wave
Limits on the Stochastic Gravitational Wave Background from the North American Nanohertz Observatory for Gravitational Waves
We present an analysis of high-precision pulsar timing data taken as part of the North American Nanohertz Observatory for Gravitational Waves (NANOGrav) project. We have observed 17 pulsars for a
Gravitational wave astronomy of single sources with a pulsar timing array
The stability of radio millisecond pulsars as celestial clocks allows for the possibility to detect and study the properties of gravitational waves (GWs) when the received pulses are timed jointly in
Gravitational Waves Probe the Coalescence Rate of Massive Black Hole Binaries
We calculate the expected nHz-μHz gravitational wave (GW) spectrum from coalescing massive black hole (MBH) binaries resulting from mergers of their host galaxies. We consider detection of this
Gravitational waves from resolvable massive black hole binary systems and observations with Pulsar Timing Arrays
Massive black holes are key components of the assembly and evolution of cosmic structures, and a number of surveys are currently on going or planned to probe the demographics of these objects and to
The sensitivity of the Parkes Pulsar Timing Array to individual sources of gravitational waves
ABSTRACT We present the sensitivity of the Parkes Pulsar Timing Array to gravitational wavesemitted by individual super-massive black-hole binary systems in the early phases ofcoalescing at the cores
Upper bounds on the low-frequency stochastic gravitational wave background from pulsar timing observations: current limits and future prospects
Using a statistically rigorous analysis method, we place limits on the existence of an isotropic stochastic gravitational wave background using pulsar timing observations. We consider backgrounds
...
...