Cosmological constraints for an Eddington-Born-Infeld field
Antonio De Felice (IF, Naresuan), Burin Gumjudpai (IF, Naresuan),, Sanjay Jhingan (CTP, Jamia Millia Islamia)
TL;DR
This paper investigates the Eddington-Born-Infeld (EBI) model as a unified dark matter and dark energy candidate, comparing its cosmological predictions with observational data and the standard $\\Lambda$CDM model.
Contribution
It provides a detailed analysis of the EBI model without a cosmological constant and assesses its viability against observational data.
Findings
EBI model does not fit observational data as well as $\\Lambda$CDM.
Different cosmological eras are reconstructed within the EBI framework.
Comparison with Supernova Ia, WMAP7, and BAO data shows limitations of the EBI model.
Abstract
We consider the Eddington-Born-Infeld (EBI) model here without assuming any cosmological constant. The EBI scalar field is supposed to play a role of both dark matter and dark energy. Different eras in cosmology are reconstructed for the model. A comparison is drawn with CDM model using Supernova Ia, WMAP7 and BAO data. It seems that the EBI field in this form does not give good fit to observational data in comparison to the CDM model.
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