Cosmology with Large Scale Structure (BAO & DESI)
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Baryon Acoustic Oscillations (BAO) are a WONDERFUL feature in the large scale structure of the universe. They originate from the sound waves propagating in the baryon-photon plasma of the very early universe. When the temperature dropped and the universe became neutral, these sound waves froze, leaving a characteristic scale in the distribution of matter. We use this scale as a “standard ruler” to measure the expansion history of the universe.
A substantial part of my research involves understanding the measurement uncertainties of BAO and improving the measurement methods, particularly using data from the Dark Energy Spectroscopic Instrument (DESI). DESI is mapping the 3D distribution of millions of galaxies, providing unprecedented precision in cosmological constraints.
Relevant Publications
- DESI DR2 results. II. Measurements of baryon acoustic oscillations and cosmological constraints - DESI Collaboration et al. (2025)
- Validation of the DESI DR2 measurements of baryon acoustic oscillations from galaxies and quasars - U. Andrade et al. (2025)
- The Compilation and Validation of the Spectroscopic Redshift Catalogs for the DESI-COSMOS and DESI-XMM-LSS Fields - J. Ratajczak et al. (2026)
- Validation of the DESI DR2 Lyensuremathalpha BAO analysis using synthetic datasets - L. Casas et al. (2026)
- Extended dark energy analysis using DESI DR2 BAO measurements - K. Lodha et al. (2025)
- Constraints on neutrino physics from DESI DR2 BAO and DR1 full shape - W. Elbers et al. (2025)
- Cosmological implications of DESI DR2 BAO measurements in light of the latest ACT DR6 CMB data - C. Garcia-Quintero et al. (2025)
- Construction of the damped Lyensuremathalpha absorber catalog for DESI DR2 Lyensuremathalpha BAO - A. Brodzeller et al. (2025)
- DESI DR2 results. I. Baryon acoustic oscillations from the Lyman alpha forest - DESI Collaboration et al. (2025)
- DESI DR2 reference mocks: clustering results from Uchuu-BGS and LRG - E. Fern'andez-Garc'ia et al. (2025)