Astronomy and Astrophysics – Astrophysics
Scientific paper
2003-04-16
Astrophys.J. 599 (2003) 820-828
Astronomy and Astrophysics
Astrophysics
28 pages, 9 figures
Scientific paper
10.1086/379363
Analyses of peculiar velocity surveys face several challenges, including low signal--to--noise in individual velocity measurements and the presence of small--scale, nonlinear flows. This is the second in a series of papers in which we describe a new method of overcoming these problems by using data compression as a filter with which to separate large--scale, linear flows from small--scale noise that can bias results. We demonstrate the effectiveness of our method using realistic catalogs of galaxy velocities drawn from N--body simulations. Our tests show that a likelihood analysis of simulated catalogs that uses all of the information contained in the peculiar velocities results in a bias in the estimation of the power spectrum shape parameter $\Gamma$ and amplitude $\beta$, and that our method of analysis effectively removes this bias. We expect that this new method will cause peculiar velocity surveys to re--emerge as a useful tool to determine cosmological parameters.
Chambers Scott W.
Feldman Hume A.
Melott Adrian L.
Watkins Richard
No associations
LandOfFree
Optimal Moments for the Analysis of Peculiar Velocity Surveys II: Testing 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 Optimal Moments for the Analysis of Peculiar Velocity Surveys II: Testing, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optimal Moments for the Analysis of Peculiar Velocity Surveys II: Testing will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-9902