53 citations · 70 across the 5 of their papers we have counts for
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The spectroscopic variability of T and in Cep
G. Catanzaro, F. Leone
Time resolved spectra of Cep yield the following average results: T =24000 250 K, = 3.91 0.05 and = 8.1 0.9 km s. N, O, Ne, Al…
Helium stratification in HD 145792: a new Helium strong star
G. Catanzaro
In this paper we report on the real nature of the star HD 145792, classified as He weak in {\it ``The General Catalogue of Ap and Am stars''}. By means of [email protected] high resol…
A spectroscopic search for non-radial pulsations in the delta Scuti star gamma Bootis
R. Ventura, G. Catanzaro, J. Christensen-Dalsgaard +2
High-resolution spectroscopic observations of the rapidly rotating delta Scuti star gamma Bootis have been carried out on 2005, over 6 consecutive nights, in order to search for li…
Spectroscopy of the hot pulsating star Beta Cephei. Velocities and EWs from C,N,O and Si lines
G. Catanzaro, F. Leone, I. Busa' +1
Frequencies in oscillating Cephei stars are usually inferred by means of radial velocities measured from the SiIII triplet 4552-4574 A. These lines, relatively insensitive to t…
Na-O Anticorrelation and HB. IV. Detection of He-rich and He-poor stellar populations in the globular cluster NGC 6218
E. Carretta, A. Bragaglia, R. G. Gratton +9
We used the multifiber spectrograph FLAMES on the ESO Very Large Telescope UT2 to derive atmospheric parameters, metallicities and abundances of O and Na for 79 red giant stars in…