Document detail
ID
oai:arXiv.org:2411.13637
Topic
Astrophysics - Cosmology and Nonga... General Relativity and Quantum Cos... High Energy Physics - Phenomenolog... High Energy Physics - TheoryAuthor
Payeur, Guillaume McDonough, Evan Brandenberger, RobertCategory
sciences: astrophysics
Year
2024
listing date
12/18/2024
Keywords
priors data energyAbstract
In light of recent observations by the Dark Energy Spectroscopic Instrument (DESI), we study evidence for thawing quintessence over a cosmological constant as dark energy, with emphasis on the effect of the choice of priors.
Working with a parametrization for the equation of state parameter motivated by the theory, we analyse the DESI BAO data jointly with Planck 2018 and Pantheon+ supernovae data, and find a preference for thawing quintessence compared to a bare cosmological constant only if we use priors which are heavily informed by the data itself.
If we extend the priors to physically better motivated ranges, the evidence for thawing quintessence disappears.
;Comment: 12 pages, 8 figures.
v2,v3 replacements features minor added comments
Payeur, Guillaume,McDonough, Evan,Brandenberger, Robert, 2024, Do Observations Prefer Thawing Quintessence?
Projection-Specific Heterogeneity of the Axon Initial Segment of Pyramidal Neurons in the Prelimbic Cortex
heterogeneity projection-specific
