17 citations · 22 across the 2 of their papers we have counts for
4 papers
HD 38858: a solar type star with a 10.8 yr activity cycle. Searching for Balmer and metallic line variations
M. Flores, J. F. González, M. Jaque Arancibia +5
Context. The detection of chromospheric activity cycles in solar-analogue and twin stars, can be used to put in context the solar cycle. However, there is a relatively low percenta…
Reticuli binary system: A puzzling chromospheric activity pattern
M. Flores, C. Saffe, A. Buccino +4
We perform, for the first time, a detailed long-term activity study of the binary system Ret. We use all available HARPS spectra obtained between the years 2003 and 2016. We bu…
He II 4686 in eta Carinae: collapse of the wind-wind collision region during periastron passage
M. Teodoro, A. Damineli, J. I. Arias +23
The periodic spectroscopic events in eta Carinae are now well established and occur near the periastron passage of two massive stars in a very eccentric orbit. Several mechanisms h…
Accurate stellar rotational velocities using the Fourier transform of the cross correlation maximum
C. G. Díaz, J. F. González, H. Levato +1
We propose a method for measuring the projected rotational velocity with high-precision even in spectra with blended lines. Though not automatic, our method is designed t…