| Full text | |
| Author(s): |
Carlos, Marilia
[1]
;
Melendez, Jorge
[1]
;
do Nascimento, Jr., Jose-Dias
[2, 3]
;
Castro, Matthieu
[2]
Total Authors: 4
|
| Affiliation: | [1] Univ Sao Paulo, Dept Astron, IAG, Rua Matao 1226, BR-05509900 Sao Paulo - Brazil
[2] Univ Fed Rio Grande do Norte, Dept Fis, BR-59072970 Natal, RN - Brazil
[3] Harvard Smithsonian Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 - USA
Total Affiliations: 3
|
| Document type: | Journal article |
| Source: | Monthly Notices of the Royal Astronomical Society; v. 492, n. 1, p. 245-249, FEB 2020. |
| Web of Science Citations: | 0 |
| Abstract | |
We determine lithium (Li) abundances for solar twins in the M67 open cluster to add valuable information about the correlation between Li depletion and stellar age and, then, better understand stellar structure and evolution. We use high resolution and good signal-to-noise ratio spectra to characterize Li depletion in three solar twins from M67, using spectral synthesis in the region of the asymmetric 6707.75 angstrom Li I feature. The mean Li abundance value of A(Li) = 1.6 +/- 0.2 dex for our sample of M67 solar twins (our three stars plus a fourth solar twin from a previous analysis in the literature) presents Li abundance expected for its age. Also, the scatter estimated from the standard deviation of the Li abundances in this work is similar to the typical scatter found in a sample of field solar twins presented in the literature. (AU) | |
| FAPESP's process: | 14/18100-4 - Stellar populations in the Milky Way: bulge, halo, disk and star forming regions; instrumentation for high resolution spectroscopy |
| Grantee: | Beatriz Leonor Silveira Barbuy |
| Support Opportunities: | Research Projects - Thematic Grants |
| FAPESP's process: | 18/04055-8 - High precision spectroscopy: from the first stars to planets |
| Grantee: | Jorge Luis Melendez Moreno |
| Support Opportunities: | Research Projects - Thematic Grants |