Session
2025 Poster
Location
Brigham Young University Engineering Building, Provo, UT
Start Date
5-5-2025 9:55 AM
Description
Among the most pressing issues in modern cosmology is the Hubble tension, in which early-universe measurements of H0 differ from late-universe measurements by > 5σ. This tension, now verging on crisis, implies continued systematic errors in either early or late universe measurement, or deeper issues with the widely accepted ΛCDM model of cosmology. To reduce systematic uncertainty, we have been developing an independent distance ladder relying on surface brightness fluctuations (SBF) and tip of the red-giant-branch (TRGB) star calibrators with data from the Hubble Space Telescope (HST) and James Webb Space Telescope (JWST). Before distance measurements can be made, data reduction and photometry must be performed.
Data Reduction and Photometry for Surface Brightness Fluctuation Measurements
Brigham Young University Engineering Building, Provo, UT
Among the most pressing issues in modern cosmology is the Hubble tension, in which early-universe measurements of H0 differ from late-universe measurements by > 5σ. This tension, now verging on crisis, implies continued systematic errors in either early or late universe measurement, or deeper issues with the widely accepted ΛCDM model of cosmology. To reduce systematic uncertainty, we have been developing an independent distance ladder relying on surface brightness fluctuations (SBF) and tip of the red-giant-branch (TRGB) star calibrators with data from the Hubble Space Telescope (HST) and James Webb Space Telescope (JWST). Before distance measurements can be made, data reduction and photometry must be performed.