78 citations · 131 across the 8 of their papers we have counts for
9 papers
A Spectroscopic Study of the Algol-type Binaries S Equulei and KO Aquilae: Absolute Parameters and Mass Transfer
F. Soydugan, A. Frasca, E. Soydugan +3
We present and analyze high-resolution optical spectra of the Algol binaries S Equ and KO Aql. New accurate radial velocities for the hotter primary components are obtained. Thanks…
Physical parameters of evolved stars in clusters and in the field from line-depth ratios
K. Biazzo, L. Pasquini, A. Frasca +6
We present a high-resolution spectroscopic analysis of two samples of evolved stars selected in the field and in the intermediate-age open cluster IC 4651, for which detailed measu…
Effective temperature vs line-depth ratio for ELODIE spectra. Gravity and rotational velocity effects
K. Biazzo, A. Frasca, S. Catalano +1
The dependence on the temperature of photospheric line-depth ratios (LDRs) in the spectral range 6190-6280 A is investigated by using a sample of 174 ELODIE Archive stellar spectra…
Deriving temperature, mass and age of evolved stars from high-resolution spectra. Application to field stars and the open cluster IC 4651
K. Biazzo, L. Pasquini, L. Girardi +6
We test our capability of deriving stellar physical parameters of giant stars by analysing a sample of field stars and the well studied open cluster IC 4651 with different spectros…
Spectroscopic Data Analysis for Precise Determination of Stellar Temperatures
K. Biazzo, A. Frasca, S. Catalano +1
The ratio of the depths of spectral lines is a powerful indicator of the effective temperature. The method based on this analysis is capable of discerning small temperature variati…
Photospheric temperature measurements in young main sequence stars
K. Biazzo, A. Frasca, G. W. Henry +2
As part of our program to study stellar photospheric and chromospheric activity, we have examined several young solar type stars with activity levels intermediate between the Sun a…