التفاصيل البيبلوغرافية
| العنوان: |
Stellar characterisation using the Single-Valued Parameter method |
| المؤلفون: |
Moedas, Nuno, Bossini, Diego, Deal, Morgan |
| المساهمون: |
Campante, Tiago L. |
| المصدر: |
TASC8/KASC15, 8th TESS/15th Kepler Asteroseismic Science Consortium Workshop, Porto, Portugal, 15-19 July 2024 |
| بيانات النشر: |
Zenodo |
| سنة النشر: |
2024 |
| المجموعة: |
Zenodo |
| الوصف: |
A star born with a specific composition will not keep it during its evolution. It changes not only with the nuclear reactions, but also due to the chemical transport mechanisms that modify the complete distribution over time. Atomic diffusion is one of the main transport processes taken into account in stellar models, and it can be divided into two main processes, gravitational settling and radiative accelerations. These two processes are in competition, but are neglected in F-type and more massive stars because they produce chemical over-variations at the stellar surface that are unrealistic. Moreover, the current method of calculating radiative accelerations is very computationally expensive and does not allow it to be included in every stellar model. In order to improve and include radiative accelerations in stellar models, we have implemented a new calculation method in MESA, the Single-Valued Parameter (SVP) method. SVP is a more efficient way of calculating radiative accelerations and allows a large number of stellar models to be calculated. Using these new stellar models, we built a stellar grid and used it to characterise a Kepler sample. We show that systematics of up to 5%, 3% and 30% in the inferred mass, radius and age of F-type stars are obtained when chemical transport mechanisms are neglected. These models are a step toward a more accurate understanding and characterisation of F-type stars. |
| نوع الوثيقة: |
lecture |
| اللغة: |
unknown |
| Relation: |
https://zenodo.org/communities/tasc8-kasc15; https://doi.org/10.5281/zenodo.12822301; https://doi.org/10.5281/zenodo.12822302; oai:zenodo.org:12822302 |
| DOI: |
10.5281/zenodo.12822302 |
| الاتاحة: |
https://doi.org/10.5281/zenodo.12822302 |
| Rights: |
info:eu-repo/semantics/openAccess ; Creative Commons Attribution 4.0 International ; https://creativecommons.org/licenses/by/4.0/legalcode |
| رقم الانضمام: |
edsbas.1291588E |
| قاعدة البيانات: |
BASE |