Overshooting calibration and age determination from evolved binary systems
نویسندگان
چکیده
منابع مشابه
Bubbles and Overshooting Crash
This paper reviews a model of bubbles under the assumption of heterogeneous rational traders. In the presence of dispersion of opinions, or sequential awareness, financial bubbles are justified by the interactions between rational arbitrageurs and behavioural traders. Timing is a very important component in the trader's strategy. This model is then extended to explain both bubbles and overshoot...
متن کاملA new age determination for γ Velorum from binary stellar evolution models
We derive a new age for the γ Velorum binary by comparing recent observations to our set of binary models. We find that it is very unlikely the stars have not interacted, which implies that previous estimates of the age from single-star models of 3.5 ± 0.4 Myrs are incorrect. We prefer an older age of 5.5 ± 1 Myrs that agrees with the age of other lower mass stars in the Vela OB association. We...
متن کاملPeculiar rotation in evolved binary systems: stellar and tidal evolution of TZ Fornacis
Aims. TZ Fornacis is an evolved binary system with an orbital period of 75.7 days and a circular orbit. The two stars have similar masses (2.045± 0.055 and 1.945± 0.027 M ) but very different radii: 8.33± 0.12 and 3.966± 0.088 R . One of its most interesting characteristics is that while the primary rotates synchronously with the mean orbital angular velocity, the secondary is rotating 16 times...
متن کاملThe Helium content and age of the Hyades: Constraints from five binary systems and Hipparcos parallaxes
We compare the accurate empirical mass-luminosity (M-L) relation based on five Hyades binary systems to predictions of stellar models calculated with various input parameters (helium, metallicity and age) or physics (mixing-length ratio, model atmosphere, equation of state and microscopic diffusion). Models based on a helium content Y∼0.28 inferred from the ∆Y/∆Z enrichment law are more than 3σ...
متن کاملUphill diffusion and overshooting in the adsorption of binary mixtures in nanoporous solids
Under certain conditions, during binary mixture adsorption in nanoporous hosts, the concentration of one component may temporarily exceed its equilibrium value. This implies that, in contrast to Fick's Law, molecules must diffuse in the direction of increasing rather than decreasing concentration. Although this phenomenon of 'overshooting' has been observed previously, it is only recently, usin...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Astronomy & Astrophysics
سال: 2018
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361/201832668