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The link between the cosmic near-IR and X-ray backgrounds: Signatures of the first black holes?

by Kari Helgason (MPA, Garching, DE)

Dec 18, 2014 from 02:00 PM to 03:30 PM

Where Seminars' room, floor -1, via Ranzani 1

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The first galaxies and miniquasars will remain largely inaccessible to future telescopes, but may be detectable via their contribution to the Cosmic near-Infrared Background (CIB) anisotropies. A significant extragalactic clustering signal from an unresolved population is now well established by CIB fluctuation measurements. I will review the current status of the field, including a recent discovery of a cross-correlation signal between the CIB fluctuations and the unresolved Cosmic X-ray Background. I present a population study of all galaxies and AGN and predict their contributions to the CIB and CXB including the mutual cross-correlation signal. I discuss the signal's potential for probing the early Universe in several upcoming CIB measurements, including LIBRAE, a science program dedicated to CIB fluctuation exploration with the Euclid telescope.

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