54 citations · 189 across the 9 of their papers we have counts for
15 papers
M dwarf spectral indices at moderate resolution: accurate and [Fe/H] for 178 southern stars
E. Costa-Almeida, G. F. Porto de Mello, R. E. Giribaldi +2
We present a spectroscopic and photometric calibration to derive effective temperatures and metallicities [Fe/H] for M dwarfs, based on a Principal Component Ana…
Rocky planet engulfment in the binary system HIP 71726-37
J. Yana Galarza, R. López-Valdivia, J. Meléndez +1
Binary stars are supposed to be chemically homogeneous, as they are born from the same molecular cloud. However, high precision chemical abundances show that some binary systems di…
Radial velocity precision of ESPRESSO through the analysis of the solar twin HIP 11915
Yuri Netto, Diego Lorenzo-Oliveira, Jorge Meléndez +4
Different stellar phenomena affect radial velocities (RVs), causing variations large enough to make it difficult to identify planet signals from the stellar variability. RV variati…
Searching for new solar twins: The Inti survey for the Northern Sky
J. Y. Galarza, R. López-Valdivia, D. Lorenzo-Oliveira +9
Solar twins are key in different areas of astrophysics, however only just over a hundred were identified and well-studied in the last two decades. In this work, we take advantage o…
Explosive nucleosynthesis of a metal-deficient star as the source of a distinct odd-even effect in the solar twin HIP 11915
Jhon Yana Galarza, Jorge Meléndez, Amanda I. Karakas +2
The abundance patterns observed in the Sun and in metal-poor stars show a clear odd-even effect. An important question is whether the odd-even effect in solar-metallicity stars is…
Rotation of solar analogs cross-matching Kepler and Gaia DR2
Jose-Dias do Nascimento, Leandro de Almeida, Eduardo Nunes Velloso +10
A major obstacle to interpreting the rotation period distribution for main-sequence stars from Kepler mission data has been the lack of precise evolutionary status for these object…