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Author Alfaro, J.; Rubio, C.; San Martin, M.
Title Cosmological Fluctuations in Delta Gravity Type
Year 2023 Publication Universe Abbreviated Journal Universe
Volume 9 Issue 7 Pages 315
Keywords cosmology; modified gravity; cosmic microwave background; cosmological perturbations; dark energy
Abstract About 70% of the Universe is Dark Energy, but the physics community still does not know what it is. Delta gravity (DG) is an alternative theory of gravitation that could solve this cosmological problem. Previously, we studied the Universe's accelerated expansion, where DG was able to explain the SNe-Ia data successfully. In this work, we computed the cosmological fluctuations in DG that give rise to the CMB through a hydrodynamic approximation. We calculated the gauge transformations for the metric and the perfect fluid to present the equations of the evolution of cosmological fluctuations. This provided the necessary equations to solve the scalar TT power spectrum in a semi-analytical way. These equations are useful for comparing the DG theory with astronomical observations and thus being able to constrain the DG cosmology.
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Publisher Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition (up)
ISSN 2218-1997 ISBN Medium
Area Expedition Conference
Notes WOS:001038838800001 Approved
Call Number UAI @ alexi.delcanto @ Serial 1866
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