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Joint Measurement of Lensing-Galaxy Correlations Using SPT and DES SV Data

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arxiv 1602.07384 v2 pith:GS5GBT77 submitted 2016-02-24 astro-ph.CO

Joint Measurement of Lensing-Galaxy Correlations Using SPT and DES SV Data

classification astro-ph.CO
keywords dataconstraintsgalaxieslensinglensing-galaxymeasurementcorrelationcorrelations
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We measure the correlation of galaxy lensing and cosmic microwave background lensing with a set of galaxies expected to trace the matter density field. The measurements are performed using pre-survey Dark Energy Survey (DES) Science Verification optical imaging data and millimeter-wave data from the 2500 square degree South Pole Telescope Sunyaev-Zel'dovich (SPT-SZ) survey. The two lensing-galaxy correlations are jointly fit to extract constraints on cosmological parameters, constraints on the redshift distribution of the lens galaxies, and constraints on the absolute shear calibration of DES galaxy lensing measurements. We show that an attractive feature of these fits is that they are fairly insensitive to the clustering bias of the galaxies used as matter tracers. The measurement presented in this work confirms that DES and SPT data are consistent with each other and with the currently favored $\Lambda$CDM cosmological model. It also demonstrates that joint lensing-galaxy correlation measurement considered here contains a wealth of information that can be extracted using current and future surveys.

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