Research output: Contribution to journal › Article › peer-review
A study of chemical abundances, rotational velocities, and orbital elements in single-lined spectroscopic binary stars in open clusters. / Ramos, A.A.; Holanda, N.; Драке, Наталия Алексеевна; Rain, M.J.; Maia, F.F.S.; Daflon, S.; Pereira, C.B.
In: Monthly Notices of the Royal Astronomical Society, Vol. 527, No. 3, 01.2024, p. 6211-6226.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - A study of chemical abundances, rotational velocities, and orbital elements in single-lined spectroscopic binary stars in open clusters
AU - Ramos, A.A.
AU - Holanda, N.
AU - Драке, Наталия Алексеевна
AU - Rain, M.J.
AU - Maia, F.F.S.
AU - Daflon, S.
AU - Pereira, C.B.
N1 - DOI: 10.1093/mnras/stad3632 Bibcode: 2024MNRAS.527.6211R
PY - 2024/1
Y1 - 2024/1
N2 - Binary interactions play a significant role in stellar evolution. In this study, we present a comprehensive analysis of 17 single-lined spectroscopic binary stars and identify two more as 'yellow stragglers', in the context of 15 young open clusters with ages younger than 1.0 Gyr. High-resolution spectroscopy () was employed to determine atmospheric parameters and chemical abundances of various elements including Li, C (C2), N (12CN), O, Na, Mg, Al, Ca, Si, Ti, Ni, Cr, Y, Zr, La, Ce, Nd, and Eu, and compared them with the abundances of stars reported in the literature. The projected rotational velocities () of 17 stars were determined via the spectral synthesis method. For two stars, we analyse the phenomenon of yellow stragglers based on their spectra and colour-magnitude diagram. Our results exhibit excellent agreement with previous studies in the literature for four stars previously analysed. Furthermore, we found a similar set of chemical abundances between thin disc stars and the studied spectroscopic binaries, except for s-process elements, such as La, Ce, and Nd. Also, we confirm that yellow straggler stars are members of binary systems, specifically giant G/K-type stars paired with dwarf A-type stars. Finally, we investigated the relationships between chemical abundances, orbital parameters (obtained from the literature), and, which can provide insights into the observed anomalies in 7Li abundance in two stars such as NGC 6694-14 and NGC 6709-303. Our findings suggest that the anomalous rotation and lithium enrichment observed in these stars are likely results of interactions within binary companions.
AB - Binary interactions play a significant role in stellar evolution. In this study, we present a comprehensive analysis of 17 single-lined spectroscopic binary stars and identify two more as 'yellow stragglers', in the context of 15 young open clusters with ages younger than 1.0 Gyr. High-resolution spectroscopy () was employed to determine atmospheric parameters and chemical abundances of various elements including Li, C (C2), N (12CN), O, Na, Mg, Al, Ca, Si, Ti, Ni, Cr, Y, Zr, La, Ce, Nd, and Eu, and compared them with the abundances of stars reported in the literature. The projected rotational velocities () of 17 stars were determined via the spectral synthesis method. For two stars, we analyse the phenomenon of yellow stragglers based on their spectra and colour-magnitude diagram. Our results exhibit excellent agreement with previous studies in the literature for four stars previously analysed. Furthermore, we found a similar set of chemical abundances between thin disc stars and the studied spectroscopic binaries, except for s-process elements, such as La, Ce, and Nd. Also, we confirm that yellow straggler stars are members of binary systems, specifically giant G/K-type stars paired with dwarf A-type stars. Finally, we investigated the relationships between chemical abundances, orbital parameters (obtained from the literature), and, which can provide insights into the observed anomalies in 7Li abundance in two stars such as NGC 6694-14 and NGC 6709-303. Our findings suggest that the anomalous rotation and lithium enrichment observed in these stars are likely results of interactions within binary companions.
KW - химические содержания
KW - двойные звезды
KW - фундаментальные параметры звезд
KW - (stars:) binaries: spectroscopic
KW - stars: abundances
KW - stars: fundamental parameters
UR - https://www.mendeley.com/catalogue/c1f827aa-3c0f-3028-af5d-92a854db9dcb/
U2 - 10.1093/mnras/stad3632
DO - 10.1093/mnras/stad3632
M3 - Article
VL - 527
SP - 6211
EP - 6226
JO - Monthly Notices of the Royal Astronomical Society
JF - Monthly Notices of the Royal Astronomical Society
SN - 0035-8711
IS - 3
ER -
ID: 122216555