APS April Meeting 2014
Volume 59, Number 5
Saturday–Tuesday, April 5–8, 2014;
Savannah, Georgia
Session R4: Invited Session: Gravitational Lensing Applications of CMB Surveys
10:45 AM–12:33 PM,
Monday, April 7, 2014
Room: Chatham Ballroom C
Sponsoring
Unit:
DAP
Chair: Lloyd Knox, University of California, Davis
Abstract ID: BAPS.2014.APR.R4.2
Abstract: R4.00002 : CMB Lensing Cross Correlations
11:21 AM–11:57 AM
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Abstract
Author:
Lindsey Bleem
(Argonne National Labs)
A new generation of experiments designed to conduct high-resolution, low-noise observations
of the Cosmic Microwave Background (CMB) ---including ACTpol, \textit{Planck}, POLARBEAR
and SPTpol--- are producing exquisite measurements of the gravitational lensing of the CMB. Such measurements, covering large fractions of the sky, provide detailed maps of the projected mass distribution extending to the surface of the CMB's last scattering. Concurrently, a large number of deep, wide-area imaging and spectroscopic surveys (e.g., the Dark Energy Survey (DES),\textit{WISE} all-sky survey, Subaru HyperSuprimeCam Survey, LSST, MS-DESI, BigBoss,
etc.) are, or will soon be, providing maps of the distribution of galaxies in the Universe. Correlations of such tracer populations with lensing data allows new probes of where and how galaxies form in the dark matter skeleton of the Universe. Recent correlations of maps of galaxy and quasar densities with lensing convergence maps have produced significant measurements of galaxy bias. The near-term prospect for improvements in such measurements is notable as more precise lensing data from CMB polarization experiments will help to break cosmological and astrophysical parameter degeneracies. Work by the \textit{Planck}, SPT, and POLARBEAR collaborations has also focused on the correlation of the Cosmic Infrared Background (CIB) with CMB lensing convergence maps. This correlation is particularly strong as the redshifts of the CIB and CMB lensing kernel are well matched. Such correlations probe high-redshift structure, constraining models of star-formation and the characteristic mass scale for halos hosting CIB galaxies and have also been used to demonstrate the first detection of CMB B-mode polarization --- an important milestone in CMB observations. Finally, combining galaxy number density, cosmic shear and CMB lensing maps has the potential to provide valuable systematic tests for upcoming cosmological results from large optical surveys such as LSST.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2014.APR.R4.2