A Measurement of the Correlation of Galaxy Surveys with CMB Lensing Convergence Maps from the South Pole Telescope

Article

Bleem, L. E., van Engelen, A., Holder, G. P., Aird, K. A., Armstrong, R., Ashby, Matthew L. N., Becker, M. R., Benson, B. A., Biesiadzinski, T., Brodwin, M., Busha, M. T., Carlstrom, J. E., Chang, C. L., Cho, H. M., Crawford, T. M., Crites, A. T., de Haan, T., Desai, S., Dobbs, M. A., Doré, O., Dudley, J., Geach, J. E., George, E. M., Gladders, M. D., Gonzalez, A. H. et al. 2012. "A Measurement of the Correlation of Galaxy Surveys with CMB Lensing Convergence Maps from the South Pole Telescope." The Astrophysical Journal Letters, 753 L9. https://doi.org/10.1088/2041-8205/753/1/L9.

We compare cosmic microwave background lensing convergence maps derived from South Pole Telescope (SPT) data with galaxy survey data from the Blanco Cosmology Survey, WISE, and a new large Spitzer/IRAC field designed to overlap with the SPT survey. Using optical and infrared catalogs covering between 17 and 68 deg² of sky, we detect a correlation between the SPT convergence maps and each of the galaxy density maps at >4?, with zero correlation robustly ruled out