Variability Census of Legacy Catalogs: New Pulsating Variables and Eclipsing Binaries

I present the preliminary results of a comprehensive variability census of the four legacy catalogs: BD, HD, SAO, and PPM. This dedicated survey project aims to identify bright A-F type variable stars using publicly available, high-precision space photometry from the Transiting Exoplanet Survey Satellite (TESS ) and Gaia. Phases I through IV of this survey, encompassing analyses of 110,152 A-F stars selected from the PPM, HD, and SAO catalogs, have been completed. To date, the project has yielded a substantial number of new variable star discoveries, including: over 11,180 new δ Scuti stars, more than 9,886 new γ Doradus stars, and over 1,342 new eclipsing binary systems, with approximately 200 exhibiting pulsations in the primary components. Furthermore, thousands of rotational variables and dozens of Heartbeat stars have been identified, demonstrating the power of this systematic approach in revealing the rich diversity of stellar variability. The full list of newly identified variable stars is presented in machine-readable format in the attached file `PPM_AFstars_NewVar_R4.csv', and an atlas of selected representative light curves is provided as a separate PDF. Citation: Zhou, Ai-Ying: 2023, Res. Notes AAS, Vol.7, 210 (I) Zhou, Ai-Ying: 2024, Res. Notes AAS, Vol.8, 81 (II) Zhou, Ai-Ying: 2024, Res. Notes AAS, Vol.8, 190 (III) Zhou, Ai-Ying: 2025, Res. Notes AAS, Vol.9, ?? (IV)