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• W3100441231 endingPage "66" @default.
• W3100441231 startingPage "66" @default.
• W3100441231 abstract "Observed high-redshift QSOs, at z~6, may reside in massive dark matter (DM) halos of more than 10^{12} Msun and are thus expected to be surrounded by overdense regions. In a series of 10 constrained simulations, we have tested the environment of such QSOs. Comparing the computed overdensities with respect to the unconstrained simulations of regions empty of QSOs, assuming there is no bias between the DM and baryon distributions, and invoking an observationally-constrained duty-cycle for Lyman Break Galaxies, we have obtained the galaxy count number for the QSO environment. We find that a clear discrepancy exists between the computed and observed galaxy counts in the Kim et al. (2009) samples. Our simulations predict that on average eight z~6 galaxies per QSO field should have been observed, while Kim et al. detect on average four galaxies per QSO field compared to an average of three galaxies in a control sample (GOODS fields). While we cannot rule out a small number statistics for the observed fields to high confidence, the discrepancy suggests that galaxy formation in the QSO neighborhood proceeds differently than in the field. We also find that QSO halos are the most massive of the simulated volume at z~6 but this is no longer true at z~3. This implies that QSO halos, even in the case they are the most massive ones at high redshifts, do not evolve into most massive galaxy clusters at z=0." @default.
• W3100441231 created "2020-11-23" @default.
• W3100441231 creator A5031745565 @default.
• W3100441231 creator A5035757328 @default.
• W3100441231 creator A5073553250 @default.
• W3100441231 creator A5082471169 @default.
• W3100441231 date "2011-07-06" @default.
• W3100441231 modified "2023-09-23" @default.
• W3100441231 title "THE DARK SIDE OF QSO FORMATION AT HIGH REDSHIFTS" @default.
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• W3100441231 doi "https://doi.org/10.1088/0004-637x/736/1/66" @default.
• W3100441231 hasPublicationYear "2011" @default.
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