Probing the dark energy with redshift space quasar clustering distortion
نویسنده
چکیده
We have run Monte Carlo simulations, for quasar clustering redshift distortions in the Two-Degree Field QSO Redshift Survey (2QZ), in order to elicit the power of redshift distortions (geometric Alcock-Paczyński and linear kinematic) to constrain the cosmological density and equation of state parameters, Ωm0,Ωx0, w, of a pressureless matter + dark energy model. It turns out that, for the cosmological constant case (w = −1), the test is especially sensitive to the difference ∆ := Ωm0 − ΩΛ0, whereas for the spatially flat case (k = 0), it is quite competitive with SNAP and DEEP, besides being complimentary to them; furthermore, we find that, whereas not knowing the actual value of the bias does not compromise the correct recovering of ∆, taking into account the linear velocity effect is absolutely relevant, all within the 2σ confidence level.
منابع مشابه
Quasar clustering redshift distortion constraints on dark energy
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