Void statistics and void galaxies in the 2dF Galaxy Redshift Survey

Details Void statistics and void galaxies in the 2dF Galaxy Redshift Survey Void statistics and void galaxies in the 2dF Galaxy Redshift Survey

Mar 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008mnras.384.1189v&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Volume 384, Issue 3, pp. 1189-1199.

Astronomy and Astrophysics

Astronomy

14

Galaxies: Formation, Cosmology: Theory, Large-Scale Structure Of Universe

Scientific paper

In the 2dF Galaxy Redshift Survey, we study the properties of voids and of fainter galaxies within voids that are defined by brighter galaxies. Our results are compared with simulated galaxy catalogues from the Millennium simulation coupled with a semi-analytical galaxy formation recipe. We derive the void size distribution and discuss its dependence on the faint magnitude limit of the galaxies defining the voids. While voids among faint galaxies are typically smaller than those among bright galaxies, the ratio of the void sizes to the mean galaxy separation reaches larger values. This is well reproduced in the mock galaxy samples studied. We provide analytic fitting functions for the void size distribution. Furthermore, we study the galaxy population inside voids defined by galaxies with BJ - 5logh < -20 and diameter larger than 10h-1Mpc. We find a clear bimodality of galaxies inside voids and in the average field but with different characteristics. The abundance of blue cloud galaxies inside voids is enhanced. There is an indication of a slight blueshift of the blue cloud. Furthermore, galaxies in void centres have slightly higher specific star formation rates as measured by the η parameter. We determine the radial distribution of the ratio of early- and late-type galaxies through the voids. We find and discuss some differences between observations and the Millennium catalogues.

Affiliated with

Also associated with

No associations

Rating

Void statistics and void galaxies in the 2dF Galaxy Redshift Survey 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 Void statistics and void galaxies in the 2dF Galaxy Redshift Survey, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Void statistics and void galaxies in the 2dF Galaxy Redshift Survey will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-870663