The origin of the cold spot in the Corona Borealis supercluster

Details The origin of the cold spot in the Corona Borealis supercluster The origin of the cold spot in the Corona Borealis supercluster

Nov 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011hsa6.conf..198f&link_type=abstract

Highlights of Spanish Astrophysics VI, Proceedings of the IX Scientific Meeting of the Spanish Astronomical Society (SEA), held

Astronomy and Astrophysics

Astrophysics

Scientific paper

The Very Small Array (VSA) detected a cold spot in the Cosmic Microwave Background (CMB) towardsthe Corona Borealis supercluster of galaxies. The origin of this spot remains unclear as itis not obviously associated to any known cluster of galaxies. We present here recent observationalresults (GTC, WHT, SDSS) and theoretical (N-body simulations) studies aimed to better understandthe origin of this anomalous spot.We carried out a near-IR survey (LIRIS@WHT) complemented with optical data (ACAM@WHT, OSIRIS@GTC and SDSS) in the line of sight of the core of this supercluster to search for new clusters of galaxies at a higher redshift. Using the Mare Nostrum Universe (an N-body SPH cosmological simulationby Yepes et al. 2007), we also study the potential of the different physical phases insuperclusters to produce similar thermal Sunyaev-Zeldovich signals to the observed in the cold spot.

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