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Naji, M. |
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Motta, Antonella |
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Aletan, Dirar |
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Mohamed, Tarek |
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Ertürk, Emre |
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Taccardi, Nicola |
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Kononenko, Denys |
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Petrov, R. H. | Madrid |
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Alshaaer, Mazen | Brussels |
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Bih, L. |
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Casati, R. |
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Muller, Hermance |
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Kočí, Jan | Prague |
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Šuljagić, Marija |
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Kalteremidou, Kalliopi-Artemi | Brussels |
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Azam, Siraj |
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Ospanova, Alyiya |
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Blanpain, Bart |
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Ali, M. A. |
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Popa, V. |
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Rančić, M. |
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Ollier, Nadège |
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Azevedo, Nuno Monteiro |
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Landes, Michael |
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Rignanese, Gian-Marco |
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Mathur, S.
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (14/14 displayed)
- 2023Seismic and spectroscopic analysis of nine bright red giants observed by <i>Kepler</i>citations
- 2022Role of solution concentration in formation kinetics of bromide perovskite thin films during spin-coating monitored by optical in situ metrologycitations
- 2021Hydrothermal synthesis of barium titanate nano/microrods and particle agglomerates using a sodium titanate precursorcitations
- 2021Green Solvent-Based Perovskite Precursor Development for Ink-Jet Printed Flexible Solar Cellscitations
- 2020How Ubiquitous is the Hot Component in the Milky Way CGM?
- 2017Interdependence of Structure, Morphology, and Phase Transitions in CVD Grown VO 2 and V 2 O 3 Nanostructures
- 2016Precursor-Derived Rare Earth Metal Pyrochlores: Nd2Sn2O7 Nanofibers and Thin Films As Efficient Photoabsorbers
- 2016Interfacial insight in multi-junction metal oxide photoanodes for water splitting applicationscitations
- 2015Pt-functionalized Fe2O3 photoanodes for solar water splitting : the role of hematite nano-organization and the platinum redox statecitations
- 2015Pt-functionalized Fe2O3 photoanodes for solar water splitting: the role of hematite nano-organization and the platinum redox statecitations
- 2015Pt-functionalized Fe2O3 photoanodes for solar water splittingcitations
- 2014Sequential physical vapor deposition and chemical vapor deposition for the growth of In2O3-SnO2 radial and longitudinal heterojunctionscitations
- 2010Asteroseismology of red giants from the first four months of Kepler data: Fundamental stellar parameterscitations
- 2008Micro-mechanics of high porosity particle-polymer composites
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article
Seismic and spectroscopic analysis of nine bright red giants observed by <i>Kepler</i>
Abstract
<jats:title>ABSTRACT</jats:title><jats:p>Photometric time series gathered by space telescopes such as CoRoT and Kepler allow to detect solar-like oscillations in red giant stars and to measure their global seismic constraints, which can be used to infer global stellar properties (e.g. masses, radii, and evolutionary states). Combining such precise constraints with photospheric abundances provides a means of testing mixing processes that occur inside red-giant stars. In this work, we conduct a detailed spectroscopic and seismic analysis of nine nearby (d &lt; 200 pc) red giant stars observed by Kepler. Both seismic constraints and grid-based modelling approaches are used to determine precise fundamental parameters for those evolved stars. We compare distances and radii derived from Gaia Data Release 3 parallaxes with those inferred by a combination of seismic, spectroscopic, and photometric constraints. We find no deviations within errors bars, however the small sample size and the associated uncertainties are a limiting factor for such comparison. We use the period spacing of mixed modes to distinguish between ascending red-giants and red clump stars. Based on the evolutionary status, we apply corrections to the values of Δν for some stars, resulting in a slight improvement to the agreement between seismic and photometric distances. Finally, we couple constraints on detailed chemical abundances with the inferred masses, radii, and evolutionary states. Our results corroborate previous studies that show that observed abundances of lithium and carbon isotopic ratio are in contrast with predictions from standard models, giving robust evidence for the occurrence of additional mixing during the red-giant phase.</jats:p>