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SUMMARY:Detection of Lensing of the CMB by Dark Matter Halos - Mat Madhava
 cheril (Stony Brook)
DTSTART:20150916T121500Z
DTEND:20150916T124500Z
UID:TALK60317@talks.cam.ac.uk
CONTACT:28811
DESCRIPTION:I will report on the first detection of lensing of the cosmic 
 microwave background (CMB) by dark matter halos. Halo lensing of the CMB p
 rovides a method for constraining cluster masses complementary to optical 
 weak lensing\, with the advantage that the source plane has a very well de
 termined redshift and statistical properties. In this work\, the lensing f
 ield was reconstructed from CMB temperature observations using the ACTPol 
 telescope and stacked at the location of CMASS galaxies which trace\ndark 
 matter halos of ~10^13 M_solar galaxy groups\, providing a 3.2 sigma detec
 tion and a ~35% mass constraint. I will summarize measurements by Planck a
 nd SPT that followed this detection and describe how contamination from th
 e thermal Sunyaev-⁠Zeldovich effect can be dealt with when using this me
 thod to calibrate cluster masses with ongoing and future high-⁠resolutio
 n CMB experiments.
LOCATION:Sackler Lecture Theatre\, IoA
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