3 Atmospheric parameters

Temperature estimates for HD 133029 were made by Burbidge & Burbidge (1955), Megessier (1971, 1988), and Adelman & White (1980) and for HD 192913 by Adelman (1982) and Megessier (1988). To improve these values, we used the uvby$\beta$ mean colors of Hauck & Mermilliod (1980) with the calibration of Napiwotzki et al. (1993) and obtained $T_{\rm eff}=11760$ K, $\log~g=4.10$ for HD 133029 and $T_{\rm eff}=11760$ K, $\log~g= 3.30$ for HD 192913. We calculated line blanketed ATLAS9 model atmospheres (Kurucz 1995) with 10 times solar metallicity, and compared their predicted fluxes with dereddened spectrophotometry and the observed H$\gamma$ profiles with synthetic spectra of the H$\gamma$ region calculated with SYNTHE (Kurucz & Avrett 1981) (Table 1). For HD 133029 we found $T_{\rm eff}=11200 \pm 100$ K, $\log~g=3.84 \pm 0.10$ dex. As discussed by Adelman et al. (1995), these model predictions fit the energy distribution reasonably well including the $\lambda$5200 broad continuum region. For HD 192913 we found in this manner, $T_{\rm eff}=10900 \pm 100$ K, $\log~g = 3.40 \pm 0.10$ dex.

  

Table 1: H$\gamma$ profiles