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J/A+A/510/A46       Pre-main sequence evolutionary tracks        (Landin+, 2010)

Theoretical values of convective turnover times and Rossby numbers for solar-like pre-main sequence stars. Landin N.R., Mendes L.T.S., Vaz L.P.R. <Astron. Astrophys. 510, A46 (2010)> =2010A&A...510A..46L
ADC_Keywords: Models, evolutionary ; Stars, pre-main sequence Keywords: stars: evolution - stars: interiors - stars: rotation - stars: pre-main sequence - stars: activity - convection Abstract: Magnetic fields are at the heart of the observed stellar activity in late-type stars, and they are presumably generated by a dynamo mechanism at the interface layer (tachocline) between the radiative core and the base of the convective envelope. Since dynamo models are based on the interaction between differential rotation and convective motions, the introduction of rotation in the ATON 2.3 stellar evolutionary code allows for explorations regarding a physically consistent treatment of magnetic effects in stellar structure and evolution, even though there are formidable mathematical and numerical challenges involved. Description: These data present pre-main sequence evolutionary tracks, including local and global convective turnover times and Rossby numbers, for 0.6, 0.7, 0.8, 0.9, 1.0, 1.1 and 1.2 solar masses. The tracks were generated with a modified version of D'Antona & Mazzitelli's code (the ATON code, Ventura et al., 1998A&A...334..953V) which take into account stellar rotation (Mendes et al., 1999A&A...341..174M). All models were computed with solar metallicity (Z=0.0175, Y=0.27) and alpha=1.5 (mixing length theory parameter). File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 60 149 Evolutionary tracks
See also: J/A+A/494/209 : Pre-main sequence evolutionary tracks (Landin+, 2009) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 4 F4.2 solMass Mass Mass 6- 12 F7.4 [yr] log(Age) Age of models 14- 20 F7.4 [solLum] log(L) Total luminosity 22- 27 F6.4 [K] log(Teff) Effective temperature 29- 33 F5.3 [cm/s2] log(g) Surface gravity 36- 41 F6.4 [s] log(k2) Local convective turnover time 44- 51 F8.4 [d] log(k3) Global convective turnover time 55- 60 F6.4 [---] log(k4) Rossby number
Acknowledgements: N. Landin, nlandin(at)
(End) Patricia Vannier [CDS] 24-Nov-2009
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