Dependence on BAO tracer families
Individual run · T-e3c1fd31dfaa
Public summary of an internal test, not yet independently validated or published.
Question investigated
Does the preference for evolving dark energy in DES-SN5YR and Union3 persist when the DESI DR1 BAO tracer families are excluded?
Test conditions
For each supernova compilation (DES-SN5YR and Union3), the fit is repeated with one DESI DR1 BAO group excluded at a time. The groups contain measurements at z = (0.51, 0.706, 0.93); (0.93, 1.317); (1.491, 2.33). The supernova data and comparison criteria are held fixed. The families compared are red galaxies, emission-line galaxies and the quasar group with Lyman-alpha.
Result
The tracer groups had unequal influence on the fit. The comparison showed neither independence from every group nor exclusive dependence on a single group.
Physical interpretation
The comparison assesses the robustness of the preference using the DESI DR1 BAO data release.