Sentences with phrase «galaxy shape measurements»
Weak lensing cosmology will be challenging: in addition to highly accurate galaxy shape measurements, statistically robust and accurate photometric redshift (photo - z) estimates for billions of faint galaxies will... ▽ More A key goal of the Stage IV dark energy experiments Euclid, LSST and WFIRST is to measure the growth of structure with cosmic time from weak lensing analysis over large regions of the sky.
https://arxiv.org/ Not exact matches
Those discrepancies, he adds, could result from imperfect measurements or «they might be because the idea of completely noninteracting dark matter isn't good enough, that there really are interactions that are affecting the shapes of galaxies.»
Precise shape measurements of faint and apparently small galaxies are required.
This measurement requires extremely precise estimation of very small galaxy shape distortions, in the presence of far larger intrinsic galaxy shapes and distortions due to the blurring kernel caused by the atmosphere, telescope optics, and instrumental effects.