7
views
0
recommends
+1 Recommend
0 collections
    0
    shares
      • Record: found
      • Abstract: not found
      • Article: not found

      Hamiltonian approach to second order gauge invariant cosmological perturbations

      ,
      Physical Review D
      American Physical Society (APS)

      Read this article at

      ScienceOpenPublisher
      Bookmark
          There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

          Related collections

          Most cited references30

          • Record: found
          • Abstract: found
          • Article: found
          Is Open Access

          Observation of Gravitational Waves from a Binary Black Hole Merger

          On September 14, 2015 at 09:50:45 UTC the two detectors of the Laser Interferometer Gravitational-Wave Observatory simultaneously observed a transient gravitational-wave signal. The signal sweeps upwards in frequency from 35 to 250 Hz with a peak gravitational-wave strain of 1.0×1021. It matches the waveform predicted by general relativity for the inspiral and merger of a pair of black holes and the ringdown of the resulting single black hole. The signal was observed with a matched-filter signal-to-noise ratio of 24 and a false alarm rate estimated to be less than 1 event per 203 000 years, equivalent to a significance greater than 5.1 {\sigma}. The source lies at a luminosity distance of 410+160180 Mpc corresponding to a redshift z=0.09+0.030.04. In the source frame, the initial black hole masses are 36+54M and 29+44M, and the final black hole mass is 62+44M, with 3.0+0.50.5Mc2 radiated in gravitational waves. All uncertainties define 90% credible intervals.These observations demonstrate the existence of binary stellar-mass black hole systems. This is the first direct detection of gravitational waves and the first observation of a binary black hole merger.
            Bookmark
            • Record: found
            • Abstract: not found
            • Article: not found

            Hamiltonian reduction of unconstrained and constrained systems

              Bookmark
              • Record: found
              • Abstract: found
              • Article: found
              Is Open Access

              Detection methods for stochastic gravitational-wave backgrounds: a unified treatment

              We review detection methods that are currently in use or have been proposed to search for a stochastic background of gravitational radiation. We consider both Bayesian and frequentist searches using ground-based and space-based laser interferometers, spacecraft Doppler tracking, and pulsar timing arrays; and we allow for anisotropy, non-Gaussianity, and non-standard polarization states. Our focus is on relevant data analysis issues, and not on the particular astrophysical or early Universe sources that might give rise to such backgrounds. We provide a unified treatment of these searches at the level of detector response functions, detection sensitivity curves, and, more generally, at the level of the likelihood function, since the choice of signal and noise models and prior probability distributions are actually what define the search. Pedagogical examples are given whenever possible to compare and contrast different approaches. We have tried to make the article as self-contained and comprehensive as possible, targeting graduate students and new researchers looking to enter this field. Electronic supplementary material The online version of this article (doi:10.1007/s41114-017-0004-1) contains supplementary material, which is available to authorized users.
                Bookmark

                Author and article information

                Journal
                PRVDAQ
                Physical Review D
                Phys. Rev. D
                American Physical Society (APS)
                2470-0010
                2470-0029
                January 2018
                January 23 2018
                : 97
                : 2
                Article
                10.1103/PhysRevD.97.023521
                4b8cf288-2154-44ce-802e-33cd14cb7e6e
                © 2018

                https://link.aps.org/licenses/aps-default-license

                History

                Comments

                Comment on this article