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Chemical signatures of planets: beyond solar-twins
I. Ramirez, J. Melendez, M. Asplund
Elemental abundance studies of solar twin stars suggest that the solar chemical composition contains signatures of the formation of terrestrial planets in the solar system, namely…
The Sun. A typical star in the solar neighborhood?
Jorge Melendez
The Sun is used as the fundamental standard in chemical abundance studies, thus it is important to know whether the solar abundance pattern is representative of the solar neighborh…
High Precision Differential Abundance Measurements in Globular Clusters: Chemical Inhomogeneities in NGC 6752
David Yong, Jorge Melendez, Frank Grundahl +9
We report on a strictly differential line-by-line analysis of high quality UVES spectra of bright giants in the metal-poor globular cluster NGC 6752. We achieved high precision dif…
The lithium isotopic ratio in very metal-poor stars
Karin Lind, Jorge Melendez, Martin Asplund +2
Un-evolved, very metal-poor stars are the most important tracers of the cosmic abundance of lithium in the early universe. Combining the standard Big Bang nucleosynthesis model wit…
The future of the Sun: an evolved solar twin revealed by CoRoT
J. -D. do Nascimento, Y. Takeda, J. Melendez +3
The question of whether the Sun is peculiar within the class of solar-type stars has been the subject of active investigation over the past three decades. Although several solar tw…