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most citedThe Mass-Metallicity Relation at z~2

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astro-ph2008★ 139 cited

Reliable Identification of Compton-thick Quasars at z~2: Spitzer Mid-IR spectroscopy of HDF-oMD49

D. M. Alexander, R. R. Chary, A. Pope +6

Many models that seek to explain the origin of the unresolved X-ray background predict that Compton-thick Active Galactic Nuclei (AGNs) are ubiquitious at high redshift. However, f…