The dust content of QSO hosts at high redshift

Understand

Infrared observations of high-z quasar (QSO) hosts indicate the presence of large masses of dust in the early universe.

• When combined with other observables, such as neutral gas masses and star formation rates, the dust content of z~6 QSO hosts may help constraining their star formation history.
• We have collected a database of 58 sources from the literature discovered by various surveys and observed in the FIR.
• We have interpreted the available data by means of chemical evolution models for forming proto-spheroids, investigating the role of the major parameters regulating star formation and dust production.