36 citations · 114 across the 6 of their papers we have counts for
5 papers · 1 filter
Metallicity estimates of Galactic Cepheids based on Walraven photometry
S. Pedicelli, J. Lub, J. W. Pel +13
We present new empirical and theoretical calibrations of two photometric metallicity indices based on Walraven photometry. The empirical calibration relies on a sample of 48 Cephei…
A refined analysis of the remarkable Bp star HR 6000
F. Castelli, S. Hubrig
UVES spectra of the very young (~10^7 years) peculiar B-type star HR 6000 were analyzed in the near-UV and visual spectral regions (3050-9460 A) with the aim to extend to other spe…
High resolution spectroscopy of HgMn stars: a time of surprises
S. Hubrig, C. R. Cowley, F. Gonzalez +1
We present the results of a high spectral resolution study of a few spectroscopic binaries with HgMn primary stars. We detect for the first time in the spectra of HgMn stars that f…
Heavy Calcium in CP Stars
C. R. Cowley, S. Hubrig, F. Castelli +2
Large wavelength shifts of infrared triplet lines of Ca II have been observed in the spectra of HgMn and magnetic Ap stars. They have been attributed to the heavy calcium isotopes,…
On the effect of helium enhancement on bolometric corrections and Teff-colour relations
L. Girardi, F. Castelli, G. Bertelli +1
We evaluate the effects that variations in He content have on bolometric corrections and Teff-colour relations. To this aim, we compute ATLAS9 model atmospheres and spectral energy…