The shape of convective core overshooting from gravity-mode period spacings
نویسندگان
چکیده
منابع مشابه
Kepler detected gravity-mode period spacings in a red giant star.
Stellar interiors are inaccessible through direct observations. For this reason, helioseismologists made use of the Sun's acoustic oscillation modes to tune models of its structure. The quest to detect modes that probe the solar core has been ongoing for decades. We report the detection of mixed modes penetrating all the way to the core of an evolved star from 320 days of observations with the ...
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Context. Gamma Doradus stars (hereafter γDor stars) are known to exhibit gravityand/or gravito-intertial modes that probe the inner stellar region near the convective core boundary. The non-equidistant spacing of the pulsation periods is an observational signature of the stellar evolutions and current internal structure and is heavily influenced by rotation. Aims. We aim to constrain the near-c...
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KIC 10553698A is a hot pulsating subdwarf B (sdB) star observed by the Kepler satellite. It exhibits dipole (l = 1) and quadrupole (l = 2) gravity modes with a clear period spacing structure. The seismic properties of the KIC 10553698A provide a test of stellar evolution models, and offer a unique opportunity to determine mixing processes. We consider mixing due to convective overshooting beyon...
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Using a new s-nucleosynthesis code coupled with the stellar evolution code Star2003, simulations have been performed to study the impact of the convection treatment on the s-process during core He-burning of a 25 M⊙ star (ZAMS mass) with an initial metallicity of Z=0.02. Particular attention has been devoted to the impact of the extent of overshooting on the s-process efficiency. The results sh...
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ژورنال
عنوان ژورنال: Astronomy & Astrophysics
سال: 2018
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361/201732317