The role of LRG1 and LRG2's monopole in inferring the DESI 2024 BAO cosmology

Understand

The Dark Energy Spectroscopic Instrument (DESI) collaboration recently released its first year of data (DR1) on baryon acoustic oscillations (BAO) in galaxy, quasar, and Lyman-$\alpha$ forest tracers.

• When combined with CMB and SNIa data, DESI BAO results suggest potential thawing behavior in dark energy.
• Cosmological analyses utilize comoving distances along ($D_H$) and perpendicular to ($D_M$) the line of sight.
• Notably, there are $1\sim2\sigma$ deviations in $D_M$ and $D_H$ from Planck cosmology values in the luminous red galaxies (LRG) bins LRG1 and LRG2.This study examines the role of LRG1 and LRG2 in diverging DESI 2024 BAO cosmology from Planck cosmology.