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image2The lower image reveals the faint structure of the Cosmic Infrared Background, compared
to the upper deep sky image from the Spitzer infrared telescope after known sources
and other foreground artifacts have been removed.
Credit: NASA/APL Caltech/GSFC
An SSAI cosmologist leads a long-term study of Cosmic Infrared Background (CIB), aimed at finding evidence of the first stars and black holes that formed in the very early Universe. The research is associated with Euclid, a European Space Agency (ESA) space telescope sky survey mission to map the geometry of the dark universe. Euclid will investigate the distance-redshift relationship and the evolution of cosmic structures by measuring shapes and redshifts of galaxies and clusters of galaxies.

The Looking at Infrared Background Radiation Anisotropies with Euclid (LIBRAE) project will use Euclid data sets to subtract foreground sources from the CIB to observe fluctuations caused by black holes and stars that were among the first objects of the Universe, with unprecedented accuracy. The Euclid data, combined with information from several other observations, will further narrow the range of possibilities for the nature of these mysterious sources of radiation—among the first observable objects in the Universe. LIBRAE’s insights into the early Universe’s contents are not obtainable by other means, making it a project of fundamental importance to cosmology.