Le 27 février 2018
De 12h45 à 13h45

Andrea Rojas (ObAS)   "Modeling optical and UV polarization of AGNs"   The structure and...

Du 18 juin 2018 au 22 juin 2018
Strasbourg, France

"The co-evolution of galaxies and the intergalactic medium during the first billion years of the...

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Galaxy luminosity modulations as a probe of large-scale flows and cosmic growth

Le 30 juin 2017
De 10h30 à 12h00

Martin FEIX

IAP

 

Spatial modulations in the observed galaxy luminosity distribution (derived from redshifts as distance proxies) trace the radial peculiar velocity field. Using spectroscopic redshift surveys, this signal can be statistically extracted to obtain independent bounds on large-scale flows and cosmic growth, which complements traditional methods (such as clustering analysis) for constraining cosmology. Considering SDSS galaxies at z~0.1, I will present recent measurements of bulk flows and the cosmic growth rate based on this approach. Finally, I will discuss ongoing developments that aim at extending the general methodology for other purposes such as applications to photometric redshift catalogs or luminosity-density correlations which offer unique possibilities to probe cosmological physics.

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