Measuring the Infall onto the Great Wall

Details Measuring the Infall onto the Great Wall Measuring the Infall onto the Great Wall

Feb 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999noao.prop..241d&link_type=abstract

NOAO Proposal ID #1999A-0241

Mathematics

Logic

Scientific paper

The infall velocity onto the largest-scale structures is a direct indicator of their mass overdensity, and thus of the matter content in the Universe. We propose to make Tully-Fisher measurements of a sample of 600 spiral galaxies in the immediate vicinity of the Great Wall, the largest sheet of galaxies within 100h^-1 Mpc. With these measurements, we will be able to detect infall velocities greater than 650 km/s on scales of 15 h^-1 Mpc, and a global mean infall rate as small as 250 km/s. This will yield a measurement of the mass overdensity in the sheet, which is a direct constraint on cosmological simulations. By comparing this mass overdensity to the galaxy overdensity, we will have a direct constraint on the biasing on 15 Mpc scales. We have already measured TF distances for 175 galaxies, and have been assigned Arecibo time to measure linewidths for the rest; here we request 0.9 meter time to obtain isophotal I band photometry of the remaining 400 sample galaxies.

Affiliated with

Also associated with

No associations

Rating

Measuring the Infall onto the Great Wall 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 Measuring the Infall onto the Great Wall, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Measuring the Infall onto the Great Wall will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-948198