@Article{Miranda:2012:RoDaEn,
               author = "Miranda, Oswaldo Duarte",
          affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)}",
                title = "Stochastic backgrounds of gravitational waves from cosmological 
                         sources - the role of dark energy",
              journal = "Monthly Notices of the Royal Astronomical Society",
                 year = "2012",
               volume = "426",
               number = "4",
                pages = "2758--2771",
                month = "Nov.",
             keywords = "close binaries, dark energy, gravitational waves, large-scale 
                         structure of universe, neutron stars.",
             abstract = "In this work we investigate the detectability of the gravitational 
                         stochastic background produced by cosmological sources in 
                         scenarios of structure formation. The calculation is performed in 
                         the framework of hierarchical structure formation using a 
                         Press-Schechter-like formalism. The model considers the 
                         coalescences of three kinds of binary systems, namely double 
                         neutron stars (NS-NS), the neutron star-black hole (NS-BH) 
                         binaries and the black hole-black hole (BH-BH) systems. We also 
                         included in the model the core-collapse supernovae leaving black 
                         holes as compact remnants. In particular, we use two different 
                         dark energy scenarios, specifically cosmological constant 
                         (\Λ) and Chaplygin gas, in order to verify their influence 
                         on the cosmic star formation rate, the coalescence rates and the 
                         gravitational wave backgrounds. We calculate the gravitational 
                         wave signals separately for each kind of source and also determine 
                         their collective contribution for the stochastic background of 
                         gravitational waves. Concerning the compact binary systems, we 
                         verify that these sources produce stochastic backgrounds with 
                         signal-to-noise ratio (S/N) values \∼1.5 (\∼0.90) 
                         for NS-NS, \∼0.50 (\∼0.30) for NS-BH, \∼0.20 
                         (\∼0.10) for BH-BH and \∼0.14 (\∼0.07) for 
                         core-collapse supernovae for a pair of advanced LIGO detectors in 
                         the cosmological-constant (Chaplygin gas) cosmology. Particularly, 
                         the sensitivity of the future third-generation detectors such as 
                         the Einstein Telescope (ET), in the triangular configuration, 
                         could increase the present S/N values by a high factor 
                         (\∼300-1000) when compared to the S/N calculated for 
                         advanced LIGO detectors. As an example, the collective 
                         contribution of these sources can produce S/N \∼ 3.3 
                         (\∼1.8) for the \Λ (Chaplygin gas) cosmology for a 
                         pair of advanced LIGO interferometers and within the frequency 
                         range \∼10Hz-1.5kHz. Considering ET we have S/N \∼ 
                         2200 (\∼1300) for the \Λ (Chaplygin gas) cosmology. 
                         Thus, the third-generation gravitational wave detectors could be 
                         used to reconstruct the history of star formation in the Universe 
                         and to contribute for the characterization of the dark energy, for 
                         example, identifying if there is evidence for the evolution of the 
                         dark energy equation-of-state parameter w(a).",
                  doi = "10.1111/j.1365-2966.2012.21887.x",
                  url = "http://dx.doi.org/10.1111/j.1365-2966.2012.21887.x",
                 issn = "1365-2966",
                label = "lattes: 9527086189389353 1 Miranda:2012:RoDaEn",
             language = "en",
           targetfile = "mnr21887.pdf",
        urlaccessdate = "30 abr. 2024"
}