| |  Online-Ressource |
|---|
| Verfasst von: | Roberts, John [VerfasserIn]  |
|---|
| | Pinsonneault, Marc H [VerfasserIn] |
|---|
| | Johnson, Jennifer A [VerfasserIn] |
|---|
| | Zinn, Joel C [VerfasserIn] |
|---|
| | Weinberg, David H [VerfasserIn] |
|---|
| | Vrard, Mathieu [VerfasserIn] |
|---|
| | Tayar, Jamie [VerfasserIn] |
|---|
| | Stello, Dennis [VerfasserIn] |
|---|
| | Mosser, Benoît [VerfasserIn] |
|---|
| | Johnson, James W [VerfasserIn] |
|---|
| | Cao, Kaili [VerfasserIn] |
|---|
| | Stassun, Keivan G [VerfasserIn] |
|---|
| | Stringfellow, Guy S [VerfasserIn] |
|---|
| | Serenelli, Aldo [VerfasserIn] |
|---|
| | Mathur, Savita [VerfasserIn] |
|---|
| | Hekker, Saskia [VerfasserIn] |
|---|
| | García, Rafael A [VerfasserIn] |
|---|
| | Elsworth, Yvonne P [VerfasserIn] |
|---|
| | Corsaro, Enrico [VerfasserIn] |
|---|
| Titel: | Nature versus nurture |
|---|
| Titelzusatz: | distinguishing effects from stellar processing and chemical evolution on carbon and nitrogen in red giant stars |
|---|
| Verf.angabe: | John D Roberts, Marc H Pinsonneault, Jennifer A Johnson, Joel C Zinn, David H Weinberg, Mathieu Vrard, Jamie Tayar, Dennis Stello, Benoît Mosser, James W Johnson, Kaili Cao, Keivan G Stassun, Guy S Stringfellow, Aldo Serenelli, Savita Mathur, Saskia Hekker, Rafael A García, Yvonne P Elsworth and Enrico Corsaro |
|---|
| E-Jahr: | 2024 |
|---|
| Jahr: | May 2024 |
|---|
| Umfang: | 18 S. |
|---|
| Illustrationen: | Diagramme |
|---|
| Fussnoten: | Gesehen am 06.11.2024 |
|---|
| Titel Quelle: | Enthalten in: Royal Astronomical SocietyMonthly notices of the Royal Astronomical Society |
|---|
| Ort Quelle: | Oxford : Oxford Univ. Press, 1827 |
|---|
| Jahr Quelle: | 2024 |
|---|
| Band/Heft Quelle: | 530(2024), 1 vom: Mai, Seite 149-166 |
|---|
| ISSN Quelle: | 1365-2966 |
|---|
| Abstract: | The surface [C/N] ratios of evolved giants are strongly affected by the first dredge-up (FDU) of nuclear-processed material from stellar cores. C and N also have distinct nucleosynthetic origins and serve as diagnostics of mixing and mass-loss. We use subgiants to find strong trends in the birth [C/N] with [Fe/H], which differ between the low-α and high-α populations. We demonstrate that these birth trends have a strong impact on the surface abundances after the FDU. This effect is neglected in current stellar models, which use solar-scaled C and N. We map out the FDU as a function of evolutionary state, mass, and composition using a large and precisely measured asteroseismic data set in first-ascent red giant branch (RGB) and core He-burning, or red clump (RC), stars. We describe the domains where [C/N] is a useful mass diagnostic and find that the RC complements the RGB and extends the range of validity to higher mass. We find evidence for extra mixing on the RGB below [Fe/H] = −0.4, matching literature results, for high-α giants, but there is no clear evidence of mixing in the low-α giants. The predicted signal of mass-loss is weak and difficult to detect in our sample. We discuss implications for stellar physics and stellar population applications. |
|---|
| DOI: | doi:10.1093/mnras/stae820 |
|---|
| URL: | Bitte beachten Sie: Dies ist ein Bibliographieeintrag. Ein Volltextzugriff für Mitglieder der Universität besteht hier nur, falls für die entsprechende Zeitschrift/den entsprechenden Sammelband ein Abonnement besteht oder es sich um einen OpenAccess-Titel handelt.
kostenfrei: Volltext: https://doi.org/10.1093/mnras/stae820 |
|---|
| | DOI: https://doi.org/10.1093/mnras/stae820 |
|---|
| Datenträger: | Online-Ressource |
|---|
| Sprache: | eng |
|---|
| K10plus-PPN: | 1907751750 |
|---|
| Verknüpfungen: | → Zeitschrift |
|---|
Nature versus nurture / Roberts, John [VerfasserIn]; May 2024 (Online-Ressource)
