The nature of the relative bias between galaxies of different spectral type in 2dFGRS

Details The nature of the relative bias between galaxies of different spectral type in 2dFGRS The nature of the relative bias between galaxies of different spectral type in 2dFGRS

2004-04-14

arxiv.org/abs/astro-ph/0404276v1

Mon.Not.Roy.Astron.Soc. 356 (2005) 456-474

Astronomy and Astrophysics

Astrophysics

19 pages, 17 figures, submitted to MNRAS

Scientific paper

10.1111/j.1365-2966.2004.08446.x

We present an analysis of the relative bias between early- and late-type galaxies in the Two-degree Field Galaxy Redshift Survey (2dFGRS). Our analysis examines the joint counts in cells between early- and late-type galaxies, using approximately cubical cells with sides ranging from 7h^{-1}Mpc to 42h^{-1}Mpc. We measure the variance of the counts in cells using the method of Efstathiou et al. (1990), which we find requires a correction for a finite volume effect. We fit lognormal models to the one-point density distribution and develop methods of dealing with biases in the recovered variances resulting from this technique. We directly fit deterministic models for the joint density distribution function, f(delta_E,delta_L), to the joint counts in cells using a maximum likelihood technique. Our results are consistent with a scale invariant relative bias factor on all scales studied. Linear bias is ruled out on scales less than l=28h^{-1}Mpc. A power-law bias model is a significantly better fit to the data on all but the largest scales studied; the relative goodness of fit of this model as compared to that of the linear bias model suggests that any nonlinearity is negligible for l>~40h^{-1}Mpc, consistent with the expectation from theory that the bias should become linear on large scales. (abridged)

Affiliated with

Also associated with

No associations

Rating

The nature of the relative bias between galaxies of different spectral type in 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 The nature of the relative bias between galaxies of different spectral type in 2dFGRS, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The nature of the relative bias between galaxies of different spectral type in 2dFGRS will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-9339