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New general parametrization of quintessence fields and its observational constraints
Nandan Roy, Alma X. Gonzalez-Morales, L. Arturo Urena-Lopez
We present a new parameterization of quintessence potentials for dark energy based directly upon the dynamical properties of the equations of motion. Such parameterization arises n…
Cosmological signatures of ultralight dark matter with an axionlike potential
Francisco X. Linares Cedeño, Alma X. González-Morales, L. Arturo Ureña-López
Nonlinearities in a realistic axion field potential may play an important role in the cosmological dynamics. In this paper we use the Boltzmann code CLASS to solve the background a…
No-go theorem for static scalar field dark matter halos with no Noether charges
Alberto Diez-Tejedor, Alma X. Gonzalez-Morales
Classical scalar fields have been considered as a possible effective description of dark matter. We show that, for any metric theory of gravity, no static, spherically symmetric, r…