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astro-ph.CO2025
Is Phantom Barrier Crossing Inevitable? A Cosmographic Analysis
Nandan Roy, Soumya Chakrabarti
Recent findings from the Dark Energy Spectroscopic Instrument (DESI), analyzed together with supernova observations and CMB measurements, provide statistically significant indicati…
astro-ph.CO2025
Constraints on DBI dark energy with chameleon mechanism
Burin Gumjudpai, Nandan Roy, John Ward
In this work, we investigate the Dirac--Born--Infeld (DBI) scalar field model with and without the inclusion of the chameleon mechanism in light of the latest cosmological observat…