7 citations · 10 across the 4 of their papers we have counts for
4 papers
On the stellar parameter dependence of the combined Fe I and Fe II chromospheric emission-line in the wings of the Ca II K line
Faiber Rosas-Portilla, Luis Zapata, Klaus-Peter Schröder +3
We present an analysis of the chromospheric emission of Fe I + Fe II in the wing of the Ca II K line of 21 G and K giant stars. Stellar parameters and absolute chromospheric fluxes…
Bright Spectroscopic Binaries: III. Binary systems with orbital periods of P > 500 days
Dennis Jack, Missael Alejandro Hernández Huerta, Faiber Danilo Rosas-Portilla +1
We present an analysis of nine bright spectroscopic binaries (HD 1585, HD 6613, HD 12390, HD 39923, HD 55201, HD 147430, HD 195543, HD 202699, HD 221643), which have orbital period…
On the physical nature of the Wilson-Bappu effect: revising the gravity and temperature dependence
F. Rosas-Portilla, K. -P. Schröder, D. Jack
We present a sample of 32 stars of spectral types G and K, and luminosity classes I to V, with moderate activity levels, covering four orders of magnitude of surface gravity and a…
Bright Spectroscopic Binaries: II. A study of five systems with orbital periods of P < 500 days
Dennis Jack, Missael Alejandro Hernández Huerta, Faiber Danilo Rosas-Portilla +1
We present a detailed analysis of five bright spectroscopic binary systems (HD 18665, HD 27131, HD 171852, HD 215550, HD 217427) that have orbital periods of P < 500 days. We deter…