Asteroseismology Study of a New Faint ZZ Ceti J053009.62+594557.0 Discovered in WFST

Abstract In this work, we present a detailed asteroseismological analysis of Wide Field Survey Telescope (WFST) J053009.62+594557.0, a newly discovered faint pulsating white dwarf by the WFST with a Gaia G magnitude of 19.13. Analysis of two nights of high-precision WFST g- band photometry reveals three significant pulsation frequencies with high signal-to-noise ratios. Follow-up P200/DBSP spectroscopy classifies the object as a DA white dwarf with T eff = 11,609 ± 605 K and M = 0.63 ± 0.22 M ⊙ . To probe its internal structure, we construct asteroseismological models with the White Dwarf Evolution Code (WDEC) . After exploring sufficient matching models, best-fitting solutions yield T eff = 11, 850 ± 10 K and M = 0.600 ± 0.005 M ⊙ , consistent with independent constraints from Gaia color–magnitude diagram, Gaia XP spectrum, P200 spectral fitting, SED fitting, and Gaia parallax. It is shown that the asteroseismological distance agrees with the Gaia parallax to 1.45%.