Studying baryon acoustic oscillations using photometric redshifts from the DESI Legacy Imaging survey DR9

Understand

Context.The Dark Energy Spectroscopic Instrument (DESI) Legacy Imaging Survey DR9 (DR9 hereafter), with its extensive dataset of galaxy locations and photometric redshifts, presents an opportunity to study baryon acoustic oscillations (BAOs) in the region covered by the ongoing spectroscopic survey with DESI.

• Aims.
• We aim to investigate differences between different parts of the DR9 footprint.
• Furthermore, we want to measure the BAO scale for luminous red galaxies within them.