Radii of some Ap,Am and A stars

Based on the observed energy curves of nine Ap stars, three Am stars, four normal A stars and one F0 V magnetic star, their radii have been estimated.Thence, the bolometric magnitudesM_bo1 have been obtained and a plot between logT_eandM_bo1 of these stars shows that a majority of Ap and Am stars are a little above the zero-age Main-Sequence, suggesting that they are slightly more evolved as compared to the normal A stars.The bolometric corrections derived from the aboveM_bo1 are much closer to those computed by Mihalas than to the ones given by Davis and Webb, the latter being about O^m1 more negative than the former.