406 citations · 2.9k across the 49 of their papers we have counts for
12 papers · 1 filter
Long-term chromospheric activity of non-eclipsing RS CVn-type stars
Andrea P. Buccino, Pablo J. D. Mauas
Context. The IUE database provides a large number of UV high and low-resolution spectra of RS CVn-type stars from 1978 to 1996. In particular, many of these stars were monitored co…
Possible chromospheric activity cycles in II Peg, UX Ari and V711 Tau
Andrea P. Buccino, Pablo J. D. Mauas
We study the Mount Wilson indices we obtained indirectly from IUE high and low resolution spectra of the RS CVn-type systems II Peg (K2IV), UX Ari (K0IV+G5V) and V711 Tau (K1IV+G5V…
Detection of period variations in extrasolar transiting planet OGLE-TR-111b
Rodrigo F. Díaz, Patricio Rojo, Mario Melita +4
Two consecutive transits of planetary companion OGLE-TR-111b were observed in the I band. Combining these observations with data from the literature, we find that the timing of the…
Mg II h + k emission lines as stellar activity indicators of main sequence F-K stars
Andrea P. Buccino, Pablo J. D. Mauas
The main purpose of this study is to use the IUE spectra in the analysis of magnetic activity of main sequence F-K stars. Combining IUE observations of MgII and optical spectroscop…
Helium line formation and abundance during a C-class flare
Vincenzo Andretta, Pablo J. D. Mauas, Ambretta Falchi +1
During a coordinated campaign which took place in May 2001, a C-class flare was observed both with SOHO instruments and with the Dunn Solar Telescope of the National Solar Observat…
A possible activity cycle in Proxima Centauri
Carolina Cincunegui, Rodrigo F. Díaz, Pablo J. D. Mauas
Several late-type stars present activity cycles resembling the Solar one. This fact has been observed mostly in stars ranging from F to K, i.e., in stars with a radiative core and…