David Koo
David Koo
accurately blinded data longer measure rates star
Having the infrared data from Spitzer allows us to measure the star formation rates very accurately because we are no longer blinded by dust.
appear dominant finding galaxies large mergers role star undergoing
We are finding that mergers do not appear to play the dominant role in star formation, because we see normal-looking, undisturbed galaxies that are undergoing large amounts of star formation.
active age fading further galaxies gradually half less modest seem star today track
We have now been able to track star formation in galaxies out to modest distances, more than half the age of the universe, and we find that all galaxies, big or small, seem to be fading gradually so that they are less active today than they were further back in time.