Statistical analysis of galaxy surveys - III: The non-linear clustering of red and blue galaxies in the 2dFGRS

Details Statistical analysis of galaxy surveys - III: The non-linear clustering of red and blue galaxies in the 2dFGRS Statistical analysis of galaxy surveys - III: The non-linear clustering of red and blue galaxies in the 2dFGRS

2006-11-10

arxiv.org/abs/astro-ph/0611313v2

Mon.Not.Roy.Astron.Soc.379:1562-1570,2007

Astronomy and Astrophysics

Astrophysics

10 pages, 3 figures, accepted by MNRAS

Scientific paper

10.1111/j.1365-2966.2007.12035.x

We present measurements of the higher-order clustering of red and blue galaxies as a function of scale and luminosity made from the two-degree field galaxy redshift survey (2dFGRS). We use a counts-in-cells analysis to estimate the volume averaged correlation functions, xi_p, as a function of scale up to order p=5, and also the reduced void probability function. Hierarchical amplitudes are constructed using the estimates of the correlation functions: S_p=(xi_p/xi_2)^(p-1). We find that: 1) Red galaxies display stronger clustering than blue galaxies at all orders measured. 2) Red galaxies show values of S_p that are strongly dependent on luminosity, whereas blue galaxies show no segregation in S_p within the errors; this is remarkable given the segregation in the variance. 3) The linear relative bias shows the opposite trend to the hierarchical amplitudes, with little segregation for the red sequence and some segregation for the blue. 4) Faint red galaxies deviate significantly from the "universal" negative binomial reduced void probabilities followed by all other galaxy populations. Our results show that the characteristic colour of a galaxy population reveals a unique signature in its spatial distribution. Such signatures will hopefully further elucidate the physics responsible for shaping the cosmological evolution of galaxies.

Affiliated with

Also associated with

No associations

Rating

Statistical analysis of galaxy surveys - III: The non-linear clustering of red and blue galaxies in the 2dFGRS 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 Statistical analysis of galaxy surveys - III: The non-linear clustering of red and blue galaxies in the 2dFGRS, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Statistical analysis of galaxy surveys - III: The non-linear clustering of red and blue galaxies in the 2dFGRS will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-565089