Research output: Contribution to journal › Article › peer-review
In this work, we show that TYC 8327-1678-1 is a low-mass red giant star with a super lithium abundance in its atmosphere. For this, we used high-resolution spectroscopy to determine atmospheric parameters, the chemical abundances of the light elements and the isotopic ratio 12C/13C using the spectral synthesis techniques and the equivalent width measurements. Also, we used theoretical evolutionary tracks to find out the mass and the evolutionary stage of TYC 8327-1678-1. The lithium abundance was determined using the Li i resonance doublet at 6708 Å and the subordinate line at 6104 Å that yielding a mean value of. The projected rotational velocity has been determined using spectral synthesis based on the isolated Fe i lines. Our results show that TYC 8327-1678-1 has a mass of a low rotational velocity ($v\, \sin \, i$ = 2.35 ± 0.24 km s-1) and metallicity of [Fe/H] = +0.23 ± 0.09. Finally, we discuss the possibility that TYC 8327-1678-1 became a lithium-rich star after a merging event involving a red giant and a helium white dwarf.
Translated title of the contribution | TYC 8327-1678-1: новый гигант со сверхвысоким содержанием лития |
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Original language | English |
Pages (from-to) | 77-83 |
Number of pages | 7 |
Journal | Monthly Notices of the Royal Astronomical Society |
Volume | 498 |
Issue number | 1 |
DOIs | |
State | Published - 1 Oct 2020 |
ID: 75626617