Abundance ratios of volatile vs . refractory elements : hints of pollutions ?
نویسندگان
چکیده
We present the abundance ratios [X/H] of a large set of chemical species with T C from 75 to 1600 K in an almost complete set of 105 planet-host stars and in a volume-limited comparison sample of 88 stars without any known planets. The large range of different T C covered by all the analysed elements allows us to investigate possible anomalous trends of [X/H] vs. T C in targets with planets with respect to comparison sample stars. This can give important hints for the detection of pollution events and for the understanding of the relative contribution of the differential accretion to the average metallicity excess found in planet host stars.
منابع مشابه
Abundance ratios of volatile vs . refractory elements in planet - harbouring stars : hints of pollution ? ⋆
We present the [X/H] trends as function of the elemental condensation temperature TC in 88 planet host stars and in a volume-limited comparison sample of 33 dwarfs without detected planetary companions. We gathered homogeneous abundance results for many volatile and refractory elements spanning a wide range of TC , from a few dozens to several hundreds kelvin. We investigate possible anomalous ...
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