| Full text | |
| Author(s): |
Rathsam, Anne
;
Melendez, Jorge
;
Silva, Gabriela Carvalho
Total Authors: 3
|
| Document type: | Journal article |
| Source: | Monthly Notices of the Royal Astronomical Society; v. 525, n. 3, p. 15-pg., 2023-09-08. |
| Abstract | |
The main goal of this work is to evaluate the correlation between Li abundance, age, and mass. Using high-quality ESO/HARPS data (R similar or equal to 115 000; 270 <= SNR <= 1000), we measured Li abundances via spectral synthesis of the 6707.8 & Aring; Li-7 line in 74 solar twins and analogs. Our joint analysis of 151 Sun-like stars (72 from our sample plus 79 solar twins from a previous study) confirms the strong Li abundance-age correlation reported by other works. Mass and convective envelope size also seem to be connected with Li abundance but with lower significance. We have found a link between the presence of planets and low Li abundances in a sample of 192 stars with a high significance. Our results agree qualitatively with non-standard models, and indicate that several extra transport mechanisms must be taken into account to explain the behaviour of Li abundance for stars with different masses and ages. (AU) | |
| FAPESP's process: | 19/19208-7 - A new sample for the search of habitable planets |
| Grantee: | Anne Viegas Rathsam |
| Support Opportunities: | Scholarships in Brazil - Scientific Initiation |
| 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 |
| FAPESP's process: | 20/15789-2 - Lithium depletion in low-mass stars |
| Grantee: | Anne Viegas Rathsam |
| Support Opportunities: | Scholarships in Brazil - Scientific Initiation |