Probabilistic cartography of the large-scale structure

Abstract

The BORG algorithm is an inference engine that derives the initial conditions given a cosmological model and galaxy survey data, and produces physical reconstructions of the underlying large-scale structure by assimilating the data into the model. We present the application of BORG to real galaxy catalogs and describe the primordial and late-time large-scale structure in the considered volumes. We then show how these results can be used for building various probabilistic maps of the large-scale structure, with rigorous propagation of uncertainties. In particular, we study dynamic cosmic web elements and secondary effects in the cosmic microwave background.

4 pages, 3 figures. Proceedings of the "Rencontres du Vietnam" 2015, Cosmology 50 years after CMB discovery, Quy Nhon, Vietnam, August 16-22, 2015. Draws from arXiv:1409.6308, arXiv:1502.02690 and arXiv:1503.00730

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