Quantify the white-dwarf exoplanet phase-curve yield in the Roman High-Latitude Time-Domain Survey

Quantify the white-dwarf exoplanet phase-curve yield of the Roman High-Latitude Time-Domain Survey using its actual filter set, cadence, stellar population, and source-blending conditions.

Background

The paper argues that the High-Latitude Time-Domain Survey may be better suited than the Galactic Bulge Time Domain Survey for phase-curve searches because its fields are less crowded and contain nearer, less diluted white dwarfs. However, the High-Latitude survey does not use the F146 filter, so the Galactic Bulge yield calculations cannot be transferred directly. A dedicated prediction is therefore required.

References

One important caveat is that the HLTDS filter set does not include F146, so the yields reported here cannot be transferred directly to the high-latitude fields. We leave a quantitative prediction for future investigations.

— Detecting White Dwarf Exoplanets in the Roman Era  (2609.09481 - Lin et al., 8 Sep 2026) in Section 5.3, High Latitude Phase Curve Search