579 citations · 1.4k across the 5 of their papers we have counts for
5 papers
The infrared colors of the Sun
L. Casagrande, I. Ramirez, J. Melendez +1
Solar infrared colors provide powerful constraints on the stellar effective temperature scale, but to this purpose they must be measured with both accuracy and precision. We achiev…
Oxygen abundances in low- and high-alpha field halo stars and the discovery of two field stars born in globular clusters
I. Ramirez, J. Melendez, J. Chaname
Oxygen abundances of 67 dwarf stars in the metallicity range -1.6<[Fe/H]<-0.4 are derived from a non-LTE analysis of the 777 nm O I triplet lines. These stars have precise atmosphe…
A library of high resolution synthetic stellar spectra from 300nm to 1.8 micron with solar and alpha-enhanced composition
P. Coelho, B. Barbuy, J. Melendez +2
Libraries of stellar spectra are fundamental tools for the study of stellar populations and both empirical and synthetic libraries have been used for this purpose. In this paper, a…
The effective temperature scale of FGK stars. II. Teff : color : [Fe/H] calibrations
Ivan Ramirez, Jorge Melendez
We present up-to-date metallicity-dependent temperature vs. color calibrations for main sequence and giant stars based on temperatures derived with the infrared flux method (IRFM).…
The effective temperature scale of FGK stars. I. Determination of temperatures and angular diameters with the infrared flux method
Ivan Ramirez, Jorge Melendez
The infrared flux method (IRFM) has been applied to a sample of 135 dwarf and 36 giant stars covering the following regions of the atmospheric parameters space: 1) the metal-rich (…