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 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 1998A&A...334..953V) which take into
account stellar rotation (Mendes et al., 1999A&A...341..174M 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:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 60 149 Evolutionary tracks
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See also:
J/A+A/494/209 : Pre-main sequence evolutionary tracks (Landin+, 2009)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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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
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Acknowledgements:
N. Landin, nlandin(at)fisica.ufmg.br
(End) Patricia Vannier [CDS] 24-Nov-2009