TY - JOUR

T1 - TYC 8327-1678-1

T2 - A new super lithium-rich K giant

AU - Holanda, N.

AU - Drake, N. A.

AU - Pereira, C. B.

N1 - Publisher Copyright: © 2020 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society. Copyright: Copyright 2020 Elsevier B.V., All rights reserved.

PY - 2020/10/1

Y1 - 2020/10/1

N2 - 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.

AB - 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.

KW - stars: abundances

KW - stars: chemically peculiar

KW - stars: fundamental parameters

KW - stars: individual: TYC 8327-1678-1

KW - stars: abundances,

KW - stars: chemically peculiar,

KW - stars: fundamental parameters,

KW - stars: individual: TYC 8327-1678-1

UR - http://www.scopus.com/inward/record.url?scp=85096993393&partnerID=8YFLogxK

UR - https://ui.adsabs.harvard.edu/abs/2020MNRAS.498...77H

U2 - 10.1093/mnras/staa2271

DO - 10.1093/mnras/staa2271

M3 - Article

AN - SCOPUS:85096993393

VL - 498

SP - 77

EP - 83

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

SN - 0035-8711

IS - 1

ER -