Date:
Tue, 10/03/201512:30-13:30
Title:
The linear velocity field of SDSS DR7 galaxies: constraints on flow amplitudes and the growth rate
Abstract:
Large-scale peculiar motion modulates the observed luminosity distribution of galaxies. Using galaxy redshift surveys, this can be harnessed to obtain bounds on peculiar velocity moments, the amplitude of the linear matter power spectrum, and the growth rate of density perturbations. In my talk, I will discuss this approach and its recent application to about half a million SDSS galaxies at z ~ 0.1. The obtained results agree well with the predictions of the LCDM model and are consistent with the reported ~ 1% zero-point tilt in the SDSS photometry.
The linear velocity field of SDSS DR7 galaxies: constraints on flow amplitudes and the growth rate
Abstract:
Large-scale peculiar motion modulates the observed luminosity distribution of galaxies. Using galaxy redshift surveys, this can be harnessed to obtain bounds on peculiar velocity moments, the amplitude of the linear matter power spectrum, and the growth rate of density perturbations. In my talk, I will discuss this approach and its recent application to about half a million SDSS galaxies at z ~ 0.1. The obtained results agree well with the predictions of the LCDM model and are consistent with the reported ~ 1% zero-point tilt in the SDSS photometry.