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The {\emph{Kepler}} space telescope has provided exquisite data to perform asteroseismic analysis on evolved star ensembles. Studying star clusters offers significant insight into stellar evolution and structure, due to having a large…

Solar and Stellar Astrophysics · Physics 2021-08-03 Zeynep Çelik Orhan

A variety of physical processes leading to different types of pulsations and chemical compositions is observed among A- and F-type stars. To investigate the underlying mechanisms responsible for these processes in stars with similar…

Solar and Stellar Astrophysics · Physics 2015-05-13 S. Hekker , Y. Fremat , P. Lampens , P. De Cat , E. Niemczura , O. L. Creevey , J. Zorec

Helioseismology has provided very detailed information about the solar interior, and extensive data on a large number of stars, although at less detail, are promised by the ongoing and upcoming asteroseismic projects. In the solar case…

Solar and Stellar Astrophysics · Physics 2015-05-19 J. Christensen-Dalsgaard

The space-borne missions CoRoT and Kepler have provided a large amount of precise photometric data. Among the stars observed, red giants show a rich oscillation pattern that allows their precise characterization. Long-duration observations…

Solar and Stellar Astrophysics · Physics 2015-07-08 M. Vrard , B. Mosser , C. Barban , K. Belkacem , Y. Elsworth , T. Kallinger , S. Hekker , R. Samadi , P. G. Beck

Subgiants and early red giants are crucial for studying the first dredge-up, a key evolutionary phase where the convective envelope deepens, mixing previously interior-processed material and bringing it to the surface. Yet, very few have…

Lithium abundance A(Li) and surface rotation are good diagnostic tools to probe the internal mixing and angular momentum transfer in stars. We explore the relation between surface rotation, A(Li) and age in a sample of seismic…

Aims: We investigate from a theoretical perspective if space asteroseismology can be used to distinguish between different thermal structures and shapes of the near-core mixing profiles for different types of coherent oscillation modes in…

Solar and Stellar Astrophysics · Physics 2019-08-20 Mathias Michielsen , May G. Pedersen , Kyle C. Augustson , Stéphane Mathis , Conny Aerts

With the observations of an unprecedented number of oscillating subgiant stars expected from NASA's TESS mission, the asteroseismic characterization of subgiant stars will be a vital task for stellar population studies and for testing our…

Solar and Stellar Astrophysics · Physics 2020-10-02 Marc Hon , Earl P. Bellinger , Saskia Hekker , Dennis Stello , James S. Kuszlewicz

We propose a new kind of seismic diagram, based on the determination of the locations of sharp acoustic features inside a star. We show that by combining the information about the position of the base of the convective envelope or the…

Astrophysics · Physics 2010-12-09 Anwesh Mazumdar

The Kepler space mission provided near-continuous and high-precision photometry of about 207,000 stars, which can be used for asteroseismology. However, for successful seismic modelling it is equally important to have accurate stellar…

Context: Being part of the brightest solar-like stars, and close solar analogues, the 16 Cygni system is of great interest to the scientific community and may provide insight into the past and future evolution of our Sun. It has been…

Solar and Stellar Astrophysics · Physics 2021-01-04 M. Farnir , M. -A. Dupret , G. Buldgen , S. J. A. J. Salmon , A. Noels , C. Pinçon , C. Pezzotti , P. Eggenberger

Asteroseismic modelling of the internal structure of main-sequence stars born with a convective core has so far been based on homogeneous analyses of space photometric Kepler light curves of 4 years duration, to which most often incomplete…

Modelling isolated rotating stars at any rotation rate is a challenge for the next generation of stellar models. These models will couple dynamical aspects of rotating stars, like angular momentum and chemicals transport, with classical…

Solar and Stellar Astrophysics · Physics 2015-06-11 Michel Rieutord , Francisco Espinosa Lara

Quantitative helio- and asteroseismology require very precise measurements of the frequencies, amplitudes, and lifetimes of the global modes of stellar oscillation. It is common knowledge that the precision of these measurements depends on…

Astrophysics · Physics 2009-11-13 Thorsten Stahn , Laurent Gizon

The rapidly increasing number of delta Scuti stars with regular patterns among their pulsation frequencies necessitates modelling tools to better understand the observations. Further, with a dozen identified modes per star, there is…

Solar and Stellar Astrophysics · Physics 2023-09-14 Simon J. Murphy , Timothy R. Bedding , Anuj Gautam , Meridith Joyce

Asteroseismology is a powerful way of determining stellar parameters and properties of stars like the Sun. However, main-sequence F-type stars exhibit short mode lifetimes relative to their oscillation frequency, resulting in overlapping…

Solar and Stellar Astrophysics · Physics 2019-02-18 Douglas L. Compton , Timothy R. Bedding , Dennis Stello

The physical parameters of the retired A star HD 185351 were analysed in great detail by Johnson et al. (2014) using interferometry, spectroscopy and asteroseismology. Results from all independent methods are consistent with HD 185351…

The treatment of convective boundaries during core helium burning is a fundamental problem in stellar evolution calculations. In Paper~I we showed that new asteroseismic observations of these stars imply they have either very large…

Solar and Stellar Astrophysics · Physics 2016-01-20 Thomas Constantino , Simon W. Campbell , John C. Lattanzio , Adam van Duijneveldt

We present updated stellar population models appropriate for old ages (>1 Gyr) and covering a wide range in metallicities (-1.5<[Fe/H]<0.3). These models predict the full spectral variation associated with individual element abundance…

Astrophysics of Galaxies · Physics 2018-02-28 Charlie Conroy , Alexa Villaume , Pieter van Dokkum , Karin Lind

Asteroseismology has started to provide constraints on stellar properties that will be essential to accurately reconstruct the history of the Milky Way. Here we look at the information content in data sets representing current and future…

Solar and Stellar Astrophysics · Physics 2016-10-19 G. R. Davies , A. Miglio
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