1999A&A...341..233V

In order to specify the nature of the sharp-lined A1V star HD 72660, its effective temperature and surface gravity have been determined using two different methods. First, the ultraviolet energy distribution of HD 72660 has been compared with that of the normal A0 star HD 10939 and with the predictions of two model atmospheres. Secondly, the parameters have been derived from Moon & Dworetsky's (1985MNRAS.217..305M) calibration of uvby colors. Both methods yield consistent values T_eff=9750±200K, logg=4.00±0.20dex. In a second part, high resolution high signal to noise optical spectra centered on λ4500Å, λ5080Å and λ6160Å have been synthesized using Gray's (1995, priv. comm) and Takeda's (1995PASJ...47..287T) LTE codes. The abundances of 13 elements were derived. C and O are found to be underabundant with respect to the solar value (-0.60 and -0.52dex respectively) whereas Ti, Cr, Fe, Ni are overabundant (between +0.37 and +0.72dex). Ca appears to be moderately overabundant (+0.16dex). These results suggest that HD 72660 is a hot Am star.