2018/04/08 by V. H. Cárdenas, Víctor H. Cárdenas, N. Cruz +4
Physics and Astronomy · #Astron #Cosmology and Gravitation Theories #Dark energy #Equation of state #Galaxies: Formation, Evolution, Phenomena #Kinetic energy #Lagrangian #Parameterized complexity #Set (abstract data type) #State (computer science) #Statistical Mechanics and Entropy #astro-ph.CO #gr-qc
paper · pdf · doi:10.1140/epjc/s10052-018-6066-8
9 pages, 15 figures. arXiv admin note: text overlap with arXiv:1212.4726 by other authors
arxiv created 2018/04/08 · openalex created_date 2018/04/13 · openalex publication_date 2018/07/01 · arxiv updated 2018/08/15 · openalex updated_date 2026/08/05
In this paper the Lagrangian density of a purely kinetic k-essence model that describes the behavior of dark energy described by four parameterized equations of state proposed by Cooray and Huterer (Astrophys J 513:L95, 1999 ), Zhang and Wu (Mod Phys Lett A 27:1250030, 2012 ), Linder (Phys Rev Lett 90:091301, 2003 ), Efstathiou (Mon Not R Astron Soc 310:842, 2000 ), and Feng and Lu (J Cosmol Astropart Phys 1111:34, 2011 ) has been reconstructed. This reconstruction is performed using the method outlined by de Putter and Linder (Astropart Phys 28:263, 2007 ), which makes it possible to solve the equations that relate the Lagrangian density of the k-essence with the given equation of state (EoS) numerically. Finally, we discuss the observational constraints for the models based on 1049 SNIa data points from the Pantheon data set compiled by Scolnic et al. (Astrophys J 859(2):101, 2018 )