Optimal Moments for Velocity Fields Analysis
| dc.creator | Feldman, Hume A | |
| dc.creator | Watkins, Richard | |
| dc.creator | Melott, Adrian | |
| dc.creator | Chambers, Will | |
| dc.date | 2003-12-19 | |
| dc.date.accessioned | 2026-07-07T02:11:40Z | |
| dc.date.available | 2026-07-07T02:11:40Z | |
| dc.description | We describe a new method of overcoming problems inherent in peculiar velocity surveys by using data compression as a filter with which to separate large-scale, linear flows from small-scale noise that biases the results systematically. 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 $Γ$ and amplitude $β$, 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. | |
| dc.identifier | https://arxiv.org/abs/astro-ph/0312514 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/0312514 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/7173 | |
| dc.subject | Astrophysics | |
| dc.title | Optimal Moments for Velocity Fields Analysis | |
| dc.type | text |