DESI × CMB lensing

Fri, 05 Jul 2024 00:00:00 +0000

— the Dark Energy Spectroscopic Instrument — is mapping tens of millions of galaxies and quasars to produce the most detailed redshift survey of the universe to date. Cross-correlating that map with CMB lensing measurements gives us a clean view of how cosmic structure has grown across cosmic time.

I lead the development and deployment of the measurement and analysis pipeline for the DESI DR2 CMB lensing cross-correlation analyses. This is data engineering at scale: galaxy catalogs spanning tens of millions of objects across six distinct samples, CMB lensing maps covering tens of thousands of square degrees, distributed computing pipelines that thread careful systematics control from raw data through to cosmological constraints.

What’s next

The same machinery extends naturally to DESI’s full 5-year dataset and future CMB lensing maps from the Simons Observatory. The pipeline is built to be reusable across galaxy samples, lensing experiments, and parameter spaces.

LSS at Scale |

DESI × CMB lensing

What’s next