Search Publications
Caracterización del sistema HD 196385 mediante imagen directa, velocidad radial y astrometría
García, L. H.; Petrucci, R.; Jofré, E. +1 more
In this paper we present a characterization of the relative orbit of HD 196385B combining data from direct imaging, radial velocity, and proper motions from the Hipparcos and Gaia missions. To perform a joint fit of the data, we used the code orvara. From the fit, we obtained ranges of possible values for the major semi-axis, the mass of the secon…
Absolute magnitudes of galactic R Coronae Borealis Stars
Milone, L. A.; Merlo, D. C.
For a long time it was generally accepted that galactic R Coronae Borealis (RCrB) stars are rather bright objects: absolute visual magnitudes ranging from -4 up to -5. On the contrary, an analysis of a sample of 15 stars of this type belonging to the Large Magellanic Cloud recently showed, that some of them are considerably fainter: absolute magni…
Abundancias químicas y estado de evolución de estrellas tipo B y A
Adelman, S. J.; Pintado, O.; Pedrosa, S.
Three stars of B (Alpha Tel and HR1781) and A (Tau7 Eri) type have been studied in order to determine their evolutionary state and the presence of chemical peculiarities. For this study we used spectra with high signal-to-noise ratios, obtained with the EBASIM spectrograph at CASLEO. The efective temperature, surface gravity, rotational velocity a…