A robust distance measurement and dark energy constraints from the spherically averaged correlation function of Sloan Digital Sky Survey luminous red Galaxies

Details A robust distance measurement and dark energy constraints from the spherically averaged correlation function of Sloan Digital Sky Survey luminous red Galaxies A robust distance measurement and dark energy constraints from the spherically averaged correlation function of Sloan Digital Sky Survey luminous red Galaxies

Apr 2012

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012mnras.tmp.2853c&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Online Early

Astronomy and Astrophysics

Astronomy

Cosmology: Observations, Distance Scale, Large-Scale Structure Of Universe

Scientific paper

We measure the effective distance to z= 0.35, DV(0.35) from the overall shape of the spherically averaged two-point correlation function (2PCF) of the Sloan Digital Sky Survey (SDSS) data release 7 luminous red galaxy sample. We find DV(0.35)=1428+74-73 without assuming a dark energy model or a flat Universe. We find that the derived measurement of ? (the ratio of the sound horizon at the drag epoch to the effective distance to z= 0.35) is more tightly constrained and more robust with respect to possible systematic effects. It is also nearly uncorrelated with ?.
Combining our results with the cosmic microwave background and supernova data, we obtain ? and w=-1.010+0.046-0.045 (assuming a constant dark energy equation of state).
We use LasDamas SDSS mock catalogues to compute the covariance matrix of the correlation function and investigate the use of lognormal catalogues as an alternative. We find that the input correlation function can be accurately recovered from lognormal catalogues, although they give larger errors on all scales (especially on small scales) compared to the mock catalogues derived from cosmological N-body simulations.

Affiliated with

Also associated with

No associations

Rating

A robust distance measurement and dark energy constraints from the spherically averaged correlation function of Sloan Digital Sky Survey luminous red Galaxies 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 A robust distance measurement and dark energy constraints from the spherically averaged correlation function of Sloan Digital Sky Survey luminous red Galaxies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A robust distance measurement and dark energy constraints from the spherically averaged correlation function of Sloan Digital Sky Survey luminous red Galaxies will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1119221