PRE MAIN SEQUENCE TRACKS AND ISOCHRONES

1997 release by F. D'Antona and I. Mazzitelli


This Web version consists of a ReadMe file with explanations, and 10 tables

- Tracks hr001.d25 Isochrones iso0125.tot Y=0.26, Z=0.01 Xd=2e-5

- Tracks hr001.d45 . Isochrones iso0145.tot Y=0.26, Z=0.01 Xd=4e-5

- Tracks hr002.d15 . Isochrones iso0215.tot Y=0.28, Z=0.02 Xd=1e-5

- Tracks hr002.d25 . Isochrones iso0225.tot Y=0.28, Z=0.02 Xd=2e-5

- Tracks hr002.d45 . Isochrones iso0245.tot Y=0.28, Z=0.02 Xd=4e-5

1998 UPDATE

In the following files, the imprecise treatment of D-burning is corrected. Further, a smaller central temperature is chosen for the first model, so the scale of times is slightly different from the scale of the 1997 models. Both corrections affect the very low mass tracks. Please make comparisons yourself and report to me any "strange" behaviours.

- Tracks 1998 hr00215.1998 , from 0.017 to 0.35Msun

- Tracks 1998 hr00225.1998 , from 0.017 to 0.9Msun

- Tracks 1998 hr00245.1998 , from 0.017 to 0.3Msun

- Isochrones 1998 iso0215.1998 Y=0.28, Z=0.02 Xd=1e-5

- Isochrones 1998 iso0225.1998 Y=0.28, Z=0.02 Xd=2e-5

- Isochrones 1998 iso0245.1998 Y=0.28, Z=0.02 Xd=4e-5

Additional information on the models can be found in the reference papers:

Presentation of the isochrones:

F.D'Antona and I. Mazzitelli, 1997 , `Evolution of low mass stars' in ``Cool stars in Clusters and Associations'', eds. G. Micela and R. Pallavicini, Mem. S.A.It., 68, 807

Problems concerning the treatment of convection in low mass stars:

F. D'Antona, I. Mazzitelli 1998 , `A role for superadiabatic convection in low mass structures?', in ``Brown Dwarfs and Extrasolar Planets", ASP Conference Series, eds. R. Rebolo, E. Martin, M.R. Zapatero Osorio, p. 442

Reasons why we adopt several initial Deuterium abundances:

Censori, C. & D'Antona, F. 1998 , ``Brown Dwarfs and the luminosity function of young stellar populations", in ``Brown Dwarfs and Extrasolar Planets" ASP Conference Series, eds. R. Rebolo, E. Martin, M.R. Zapatero Osorio, p. 518


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