Astronomy and Astrophysics – Astrophysics
Scientific paper
2003-06-02
Phys.Rev.D68:063004,2003
Astronomy and Astrophysics
Astrophysics
8 pages, 5 figures submitted to PRD
Scientific paper
10.1103/PhysRevD.68.063004
The cosmic microwave background (CMB) has provided a precise template for features in the linear power spectrum: the matter-radiation turnover, sound horizon drop, and acoustic oscillations. In a two dimensional power spectrum in redshift and angular space, the features appear as distorted rings, and yield simultaneous, purely geometric, measures of the Hubble parameter H(z) and angular diameter distance D_A(z) via an absolute version of the Alcock-Paczynski test. Employing a simple Fisher matrix tool, we explore how future surveys can exploit these rings of power for dark energy studies. High-z CMB determinations of H and D_A are best complemented at moderate to low redshift (z < 0.5) with a population of objects that are at least as abundant as clusters of galaxies. We find that a sample similar to that of the ongoing SDSS Luminous Red Galaxy (LRG) survey can achieve statistical errors at the ~5% level for D_A(z) and H(z) in several redshift bins. This, in turn, implies errors of sigma(w)=0.03-0.05 for a constant dark energy equation of state in a flat universe. Deep galaxy cluster surveys such as the planned South Pole Telescope (SPT) survey, can extend this test out to z~1 or as far as redshift followup is available. We find that the expected constraints are at the sigma(w)=0.04-0.08 level, comparable to galaxies and complementary in redshift coverage.
Haiman Zoltan
Hu Wayne
No associations
LandOfFree
Redshifting Rings of Power does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Redshifting Rings of Power, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Redshifting Rings of Power will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-79326