Linear approximation of seismic inversions: new kernels and structural effects
| Autor: | G. Buldgen, Daniel R. Reese, Marc-Antoine Dupret |
|---|---|
| Přispěvatelé: | University of Liège, Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Etoile, Laboratoire d'études spatiales et d'instrumentation en astrophysique = Laboratory of Space Studies and Instrumentation in Astrophysics (LESIA), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité) |
| Rok vydání: | 2019 |
| Předmět: |
Physics
General Engineering FOS: Physical sciences Astronomy and Astrophysics Inversion (meteorology) Kepler Asteroseismology Stars Kernel (linear algebra) Photometry (astronomy) Astrophysics - Solar and Stellar Astrophysics Space and Planetary Science Astrophysics::Solar and Stellar Astrophysics Point (geometry) Astrophysics::Earth and Planetary Astrophysics Linear approximation Statistical physics [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] Solar and Stellar Astrophysics (astro-ph.SR) |
| Zdroj: | Astro Fluid 2016 : An international conference in memory of Professor Jean-Paul Zahn's great scientific achievements Astro Fluid 2016 : An international conference in memory of Professor Jean-Paul Zahn's great scientific achievements, Jun 2016, Paris, France, France |
| ISSN: | 1638-1963 1633-4760 |
| Popis: | Thanks to the space-based photometry missions CoRoT and Kepler, we now benefit from a wealth of seismic data for stars other than the sun. In the future, K2, Tess and Plato will provide further observations. The quality of this data may allow kernel-based linear structural inversion techniques to be used for stars other than the sun. To understand the limitations of this approach, we analyse the validity of the linear assumption used in these inversion techniques. We inspect various structural pairs and see how they are affected by structural changes. We show that uncertainties in radius strongly affect structural pairs of nondimensional variables, and that various other effects might come into play. Amongst these, the importance of micro-physics give the most striking example of how uncertainties in stellar models impact the verification of the linear relations. We also point out that including seismic constraints in the forward modelling fit helps with satisfying the linear relations. Comment: To appear in the proceedings of the Astrofluid 2016 Conference |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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