TITLE:
A search for lensing of CMB in correlation with large-scale structure.
AUTHOR(S):
Christopher M. Hirata (Princeton Univ.), for the SDSS collaboration.
DATE:
2004 Jul 20 (presented); 2005 June 15 (published).
AVAILABILITY:
Cambridge Univ. Press; ordering information is here.
PUBLICATION INFORMATION:
Proc. IAU Symposium 225, Gravitational Lensing Impact on Cosmology, edited by Yannick Mellier and Georges Meylan (2004).
ISBN: 0521851963. pp. 111-116.
ABSTRACT:
We present the results of a search for gravitational lensing of the cosmic microwave background (CMB) in cross-correlation with the
projected density of luminous red galaxies (LRGs). The CMB lensing reconstruction is performed using the first year of Wilkinson
Microwave Anisotropy Probe (WMAP) data, and the galaxy maps are obtained using the Sloan Digital Sky Survey (SDSS) imaging
data. We find no detection of lensing; our constraint on the galaxy bias derived from the galaxy-convergence cross-spectrum is
bg=1.81 +/- 1.92 (1s, statistical), as compared to the expected result of bg~1.7 for
this sample. We discuss possible instrument-related systematic errors and show that the Galactic foregrounds are not important. We do
not find any evidence for point source or thermal Sunyaev-Zel'dovich effect contamination.
ADS BIBLIOGRAPHIC CODE: N/A.
COMMENTS:
SDSS Publication #416. Based on Hirata et al (2004).