3 papers
astro-ph.EP2019
First observation of a planetary transit with the SPARC4 CCD: improved parameters for HATS-24b
Janderson M. Oliveira, Eder Martioli, Marcelo Tucci-Maia
The photometric monitoring of planetary transits is an important method for the characterization of exoplanets. Transiting exoplanets allow measurements of the planetary radius and…
astro-ph.SR2018
Chemical inhomogeneities in the Pleiades: signatures of rocky-forming material in stellar atmospheres
Lorenzo Spina, Jorge Meléndez, Andrew R. Casey +2
The aim of Galactic archaeology is to recover the history of our Galaxy through the information encoded in stars. An unprobed assumption of this field is that the chemical composit…
astro-ph.SR2016
2MASS J18082002-5104378: The brightest (V=11.9) ultra metal-poor star
Jorge Melendez, Vinicius M. Placco, Marcelo Tucci-Maia +3
Context. The most primitive metal-poor stars are important for studying the conditions of the early galaxy and are also relevant to big bang nucleosynthesis. Aims. Our objective is…