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V578 Mon is an eclipsing binary system in which both stars have masses above10 Msun determined with an accuracy better than 3%. It is one of only five suchmassive eclipsing binaries known that also possess eccentric orbits andmeasured apsidal motions, thus making it an important benchmark for theoreticalstellar evolution models. However, recently reported determinations of theradii of V578 Mon differ significantly from previously reported values. Wereanalyze the published data for V578 Mon and trace the discrepancy to the useof an incorrect formulation for the stellar potentials in the most recentanalysis. Here we report corrected radii for this important benchmark eclipsingbinary.

Reanalysis of the Radii of the Benchmark Eclipsing Binary V578 Mon