Speaker
Kwan Chuen Chan
(Sun-Yat Sen University)
Description
Tidal field can cause distortion of galaxy shape and leaves characteristic imprint on the galaxy density-shear correlation on the BAO scale. This is the so-called GI BAO. It bridges the gap between BAO and shear measurement, and serves as a useful consistency check. Using the DES data, we report the first measurement of the GI BAO using photometric data alone. Despite the low detection significance, our result agrees with the DES density BAO measurement, serving as an independent cross-check.
Primary author
Kwan Chuen Chan
(Sun-Yat Sen University)
