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Hydrogen Line Shape Uncertainties in White Dwarf Model Atmospheres
Frontiers in Astronomy and Space Sciences
For isolated white dwarf (WD) stars, fits to their observed spectra provide the most precise estimates of their effective temperatures and surface gravities. Even so, recent studies have shown that systematic offsets exist between such spectroscopic parameter determinations and those based on broadband photometry. These large discrepancies (10% in Teff, 0.1 M⊙ in mass) provide scientific motivation for reconsidering the atomic physics employed in the model atmospheres of these stars. Recentdoi:10.3389/fspas.2022.830163 fatcat:o6vp2y3e5vbw5hkqqnfjneh7wu