FRUITY – FUll-Network Repository of Updated Isotopic Tables & Yields
FRUITY is the only world-wide database entirely dedicated to the evolution and nucleosynthesis of Asymptotic Giant Branch (AGB) stars .
All models have been calculated with the FUll Network Stellar (FUNS) evolutionary code, which includes a full nuclear network form hydrogen to bismuth (no post-process calculation is needed) . The adopted mass-loss rate has been calibrated on the Period-Luminosity and Period-Mass loss relations observed in Long Period Variable Stars . In the envelope, atomic and molecular opacities are calculated according to the changes in the chemical composition due to the occurrence of third dredge up (TDU) episodes . The radiative/convective interface at the inner border of the convective envelope is treated by applying an exponential decay of the convective velocities. As a by-product, we obtain the self-consistent formation of the 13C pocket (the major neutron source in low mass AGB stars) after each Thermal Pulse (TP) followed by TDU. We propose two different prescriptions for the handling of the inner boundary during a TDU episode [4,5], giving the user the possibility to choose the preferred solution. Models with different initial rotation velocities are also available: rotation is particularly important for AGB nucleosynthesis, because it strongly affects the production of heavy elements, synthesized by the slow neutron capture process .
To date, FRUITY contains more than 100 models, spanning a wide range of masses (1.3<M/Msun<6), metallicities (-2.85<[Fe/H]<+0.15) and rotation velocities (0 km/s < vrot < 60 km/s). For each model, both the physical and chemical evolutions are available. We provide: AGB duration, luminosities, gravities, temperatures, efficiency of dredge up episodes (FDU, SDU and TDU), interpulse durations and so on. Moreover, tables of surface pulse by pulse elemental and isotopic compositions, as well as net and total yields, are available. Data can be visualized on the screen or downloaded as ASCII files. Different visualization formats are available, depending on the request made by the user.
Upgrades and news about the FRUITY database are reported in a dedicated newsletter, to which everyone can access by registering her/his e-mail.
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