Young stars in high-z QSO host galaxies

Astronomy and Astrophysics – Astronomy

Scientific paper

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98.54.Aj, 98.62.Lv, 98.62.Qz

Scientific paper

We study the stellar properties of type 1 QSO host galaxies at redshifts to z ˜ 3 using the HST within the GEMS project as well as ground based adaptive optics. The host galaxies have a tendency for younger stars than their inactive counterparts, showing the coeval evolution of Black Holes and stars in progress. Judging from 40% distorted morphologies at z < 1.1, the merging and/or interaction of galaxies is the obvious candidate to trigger star formation and to funnel gas into the central parts of the host galaxies at the same time.

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