GL2 - Statistics and Geometry of Weak Lensing Data |
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Speaker |
Bianchini, Federico |
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| Talk Title |
Cross-correlation In The High-z Sky: The Planck And Herschel Case |
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Abstract |
High-resolution Cosmic Microwave Background (CMB) measurements carried out both by space- and ground-based experiments enables us to reconstruct the CMB Lensing map which probes the matter distribution in the Universe out to high redshifts, hence encoding a wealth of cosmological information. On the other side, dusty star-forming galaxies (DSFG) at z > 1.5 are the biased signposts of the haloes that act as lenses for CMB photons. I will present the first cross-correlation analysis between CMB Lensing maps released by Planck team in 2013/2015 and the spatial distribution of the sub-mm selected high-z H-ATLAS galaxies, describing both datasets and technique exploited. The signal is detected with high significance even when analysis is performed tomographically in redshift bins. I will show constraints on galaxy bias inferred from jointly clustering and cross-correlation data, discussing possible systematics and future work needed in order to fully exploit upcoming CMB and galaxy surveys. |
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