Astrophysics (index)about

band shifting

(cosmological band shifting)
(effect of redshift on photometry)

Band shifting (or cosmological band shifting) is the effect of redshift on photometry and other astronomical observations similarly-restricted to certain bands. It is the cause of dropouts, thus a mechanism by which can be distances are detected, but also must be taken into account in estimating star formation rates of distant galaxies. The gross spectral characteristics provided by photometry are often the only information available because the limited received electromagnetic radiation makes spectrography a very lengthy undertaking when not totally impractical.