Journal article

Imprints of gravitational lensing in the Planck cosmic microwave background data at the location of WISE x SCOS galaxies

Srinivasan Raghunathan, Federico Bianchini, Christian L Reichardt



We detect weak gravitational lensing of the cosmic microwave background at the location of the WISE×SuperCOSMOS (WISE×SCOS) galaxies using the publicly available Planck lensing convergence map. By stacking the lensing convergence map at the position of 12.4 million galaxies in the redshift range 0.1≤z≤0.345, we find the average mass of the galaxies to be M200crit=6.25±0.6×1012 M. The null hypothesis of no lensing is rejected at a significance of 17σ. We split the galaxy sample into three redshift slices, each containing ∼4.1 million objects, and obtain lensing masses in each slice of 4.18±0.8, 6.93±0.9, and 18.84±1.2×1012 M. Our results suggest a redshift evolution of the galaxy sample masse..

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University of Melbourne Researchers


Awarded by Australian Research Council's Discovery Projects scheme

Awarded by Australian Research Council Future Fellowship

Awarded by Office of Science of the U.S. Department of Energy

Funding Acknowledgements

We thank James Bartlett and Gil Holder for their valuable suggestions and comments. We also thank Benedetta Vulcani for useful discussions. We thank all three anonymous referees for useful suggestions that helped in shaping this manuscript to be better. We acknowledge the support from Australian Research Council's Discovery Projects scheme (Grant No. DP150103208). F. B. acknowledges support from an Australian Research Council Future Fellowship (Grant No. FT150100074). We thank the high performance computation center at University of Melbourne for providing access to the cluster SPARTAN.UNIMELB.EDU.AU; University of Chicago for SPT.UCHIAGO.EDU; and the Wide Field Astronomy Unit at the Institute for Astronomy, Edinburgh, for archiving the WISE x SCOS catalog. In this paper, we made use of HEALPix, HEALPY, and othe Planck Legacy Archive. This research used resources of the National Energy Research Scientific Computing Center, a DOE Office of Science User Facility supported by the Office of Science of the U.S. Department of Energy under Contract No. DE-AC02-05CH11231.