Chemical imprints in atmospheric abundance of stars with massive planets
| Main Authors: | Mishenina Tamara, Basak Nina, Adibekyan Vardan, Soubiran Caroline, Kovtyukh Valery |
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| Format: | Proceeding poster Journal |
| Terbitan: |
, 2021
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| Subjects: | |
| Online Access: |
https://zenodo.org/record/4558086 |
Daftar Isi:
- Stellar parameters of 25 stars with detected massive planets and abundances of 25 elements from Li to Eu, were investigated based on homogeneous high resolution spectra. The iron abundance [Fe/H] and key elements (Li, C, O, Mg, Si) indicative of the planet formation, as well as the dependencies of [El/Fe] on the condensation temperature (Tcond), were analyzed. We found some interesting results: the mean values of C/O and [C/O] are <C/O> = 0.48 ±0.07 and <[C/O]> = -0.07 ±0.07, slightly lower than solar ones; the Mg/Si ratios range from 0.83 to 0.95 for four stars in our sample and from 1.0 to 1.86 for the remaining 21 stars; various slopes of [El/Fe] versus Tcond. The dependencies of the planetary mass on metallicity, the lithium abundance, the C/O and Mg/Si ratios, and also on the [El/Fe]--Tcond slopes were considered.