Signature of Early Black holes in Cosmic Backgrounds
Abstract
I will present our recent discovery of significant coherent fluctuations in the unresolved Cosmic IR and X-ray Backgrounds on arcminute scales. We modeled such a signal and we were not able to reproduce the observations when including known source populations like AGN, Galaxies and Clusters emissivity folded with their clustering properties below z∼6. The remaining excess signal has a similar shape to the already known excess in the large scale CIB fluctuations. I will present some possible interpretations which point toward abundant populations of black holes in the early Universe, likely Direct Collapse Black Holes or POPIII Stars remnants. Finally I will show some predictions for the detection of the first black holes in the Universe in the eROSITA, Athena, Euclid and JWST cosmic backgrounds.
- Publication:
-
The X-ray Universe 2014
- Pub Date:
- July 2014
- Bibcode:
- 2014xru..confE.235C