Abstract Details
| Name: Sourav Das Affiliation: Inter-University Centre for Astronomy and Astrophysics Conference ID: ASI2025_637 Title : Etherington distance-duality relation using SN and BAO Authors and Co-Authors : Sourav Das 1, Surhud More 1, 2 Abstract Type : Poster Abstract Category : Galaxies and Cosmology Abstract : The Etherington distance-duality relation, relates the luminosity distance D_L and angular diameter distance D_A by redshift z such that D_L = D_A*(1+z)^2. This relation is derived purely under the assumptions of photon number conservation and a metric theory of gravity. In the absence of such non-standard mechanisms, the Etherington relation can be used to test for systematic errors in cosmological data. The luminosity distance D_L is obtained from Type-Ia supernovae, which serve as standardizable candles, while the angular diameter distance D_A is derived from Baryon Acoustic Oscillations (BAO). Recently the DESI collaboration has claimed a deviation of dark energy from a cosmological constant. In light of this, we present results on a test of the different Supernova and BAO data used in the DESI cosmological analyses. |