Protostars and Planets VI, Heidelberg, July 15-20, 2013
Unraveling the planet metallicity correlation in evolved stars
Maldonado, Jesus (Universidad Autonoma de Madrid)
Villaver, Eva (Universidad Autonoma de Madrid)
Eiroa, Carlos (Universidad Autonoma de Madrid)
Twenty years after the discovery of the first exoplanets, most of our current knowledge on planet formation is still based on observations of main-sequence stars, in particular, the correlation between the metallicity of the star and the presence of giant planets. Last years have been fruitful in discovering a wide variety of planets around evolved stars opening for the first time the possibility of testing planet formation in a very different environment. Although several attempts to study the properties of evolved stars with planets have been made, they are mainly based on small or inhomogeneous samples. In this contribution we present the results of a high-resolution spectroscopic survey which includes, to our best knowledge, the best combination so far between homogeneous analysis and sample size.
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