DeepCIP: Probing Compensated Isocurvature Perturbations in the CMB using deep neural nets
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2021
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Swarthmore College. Dept. of Physics & Astronomy
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en
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Abstract
It is almost unbelievable to realize that just a century ago we did not know that
galaxies outside Milky Way exist let alone the Universe is expanding. After Einstein formulated his theory of General Relativity, it became apparent to him, the
theory does not seem to describe the static universe most scientists at the time
thought we lived in. This prompted him to introduce a cosmological constant
in his equations to make the Universe, as described by his equations, static [1].
Alexander Friedmann and Georges Lemaıtre, from solving Einstein’s equations,
independently predicted that the Universe is expanding and the recession velocity
of galaxies is proportional to the distance between them [2, 3]. This prediction
was later confirmed by Edwin Hubble who measured the distance from Earth to
multiple galaxies by measuring the distance to Cepheid variable stars in those
galaxies [4].