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Download PDF Abstract: A design study is currently in progress for a third generationgravitational-wave sầu (GW) detector called Einstein Telescope (ET). An importantkind of source for ET will be the inspiral & merger of binary neutron stars(BNS) up to $z slặng 2$. If BNS mergers are the progenitors of short-hard$gamma$-ray bursts, then some fraction of them will be seen bothelectromagnetically & through GW, so that the luminosity distance & theredshift of the source can be determined separately. An important property ofthese `standard sirens" is that they are emphself-calibrating: theluminosity distance can be inferred directly from the GW signal, with no needfor a cosmic distance ladder. Thus, standard sirens will provide a powerfulindependent kiểm tra of the $Lambda$CDM model. In previous work, estimates weremade of how well ET would be able khổng lồ measure a subset of the cosmologicalparameters (such as the dark energy parameter $w_0$) it will have access khổng lồ,assuming that the others had been determined lớn great accuracy by alternativemeans. Here we persize a more careful analysis by explicitly using thepotential Planông xã CMB data as prior information for these other parameters. Wefind that ET will be able lớn constrain $w_0$ và $w_a$ with accuracies $Deltaw_0 = 0.099$ & $Delta w_a = 0.302$, respectively. These results are comparedwith projected accuracies for the JDEM Baryon Acoustic Oscillations project andthe SNAP.. Type Ia supernovae observations.
|Comments:||28 pages, 5 figures, 5 tables; Published Version|
|Subjects:||Cosmology and Nongalactic Astrophysics (astro-ph.CO); General Relativity and Quantum Cosmology (gr-qc); High Energy Physics - Phenomenology (hep-ph); High Energy Physics - Theory (hep-th)|
|Cite as:||realchampionshipwrestling.com:1009.0206 |
|(or realchampionshipwrestling.com:1009.0206v4 |