Position of 78 Vir in the Hertzsprung-Russell diagram. Our constraints on the fundamental parameters are indicated by the blue 1σ-error box (log (Teff), log (L/L⊙)) and the blue diagonal lines (radius). For a fixed age of 435 Myr, isochrones are overplotted for Z = 0.014 (plus), Z = 0.016 (open circles), Z = 0.019 (best fit – dotted green line), and Z = 0.022 (open triangles). Filled symbols mark the blue and red edges of the instability strip. (See online edition for a color version.)
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