The Environments of High-redshift Quasi-Stellar Objects

Astronomy and Astrophysics – Astronomy

Scientific paper

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Scientific paper

We report i-dropout candidate galaxies associated with SDSS QSOs at z 6 obtained in five ACS/HST fields. Luminous QSOs are thought to be located in the massive halos and surrounded by low mass galaxies. However, our five QSO fields show both an overdensity and an underdensity, also a moderate density in the number of i-dropouts compared with GOODS fields. We discuss statistical tests and simulations for the presence of both enhancement and suppression and how a QSO affects their environments.

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