A new list of effective temperatures of chemically peculiar stars. III

Abstract

Our system of effective temperatures (paper II) is analysed by way of comparison with the Hipparcos data and the correctness of the methods of their determination is verified. With the aid of these temperatures absolute bolometric magnitudes of more than 220 CP stars have been estimated from the parameters of multicolour β and c₁ photometry. The mean discrepancy between the Hipparcos and our data proves to be equal to ±0.^m4. The difference is due not only to measurement errors, but also to the effect the blanketing by spectral lines of excess elements has on the parameters β and c₁. It has been found that the error of relative radii R/R_ZAMS used as the criterion of age is on the average ±0.2. The lists of the values of T_e, M_b and R/R_ZAMS derived from the Hipparcos and colour data are presented.