부산대학교 도서관

Cosmic shear is a key probe of modern cosmology. Amongst its challenges are shape noise and intrinsic alignments, both due to our ignorance of the unlensed shape of the source galaxies. I argue here that Einstein rings may be used as standard shapes to measure the external shear along their line of sight. In the Euclid era, this new observable is expected to be a competitive and complementary probe of the large-scale structure of the Universe.
Comment: 4 pages, 2 figures, contribution to the 2024 Cosmology session of the 58th Rencontres de Moriond; v2 corrects a display bug for certain PDF readers