Dr Wolfram Freudling (Space Telescope - European Coordinating Facility, ESO)

QSOs at z~6: What do they tell us about early star formation? - Dr Wolfram Freudling Colloquium

ATNF Marsfield Lecture Theatre

Abstract

Observations of QSOs at a redshift of 6 and above probe the Universe
when it was less than a billion years old. The spectral properties of
these objects are remarkable similar to those at lower redshifts.
This lack of evolution is in particular surprising for elements such
as iron, for which predicted production times scales in supernovae of
type Ia are on the order of several 100 million years. The talk will
discuss observations and possible scenarios of metal production in
high-z QSOs.