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We present a self-consistent, absolute isochronal age scale for young (< 200Myr), nearby (< 100 pc) moving groups in the solar neighbourhood based onhomogeneous fitting of semi-empirical pre-main-sequence model isochrones usingthe tau^2 maximum-likelihood fitting statistic of Naylor & Jeffries in the M_V,V-J colour-magnitude diagram. The final adopted ages for the groups are:149+51-19 Myr for the AB Dor moving group, 24+/-3 Myr for the {\beta} Picmoving group (BPMG), 45+11-7 Myr for the Carina association, 42+6-4 Myr for theColumba association, 11+/-3 Myr for the {\eta} Cha cluster, 45+/-4 Myr for theTucana-Horologium moving group (Tuc-Hor), 10+/-3 Myr for the TW Hyaassociation, and 22+4-3 Myr for the 32 Ori group. At this stage we areuncomfortable assigning a final, unambiguous age to the Argus association asour membership list for the association appears to suffer from a high level ofcontamination, and therefore it remains unclear whether these stars represent asingle population of coeval stars.  Our isochronal ages for both the BPMG and Tuc-Hor are consistent with recentlithium depletion boundary (LDB) ages, which unlike isochronal ages, arerelatively insensitive to the choice of low-mass evolutionary models. Thisconsistency between the isochronal and LDB ages instills confidence that ourself-consistent, absolute age scale for young, nearby moving groups is robust,and hence we suggest that these ages be adopted for future studies of thesegroups.  Software implementing the methods described in this study is available fromhttp: //www.astro.ex.ac.uk/people/timn/tau-squared/.

A self-consistent, absolute isochronal age scale for young moving groups in the solar neighbourhood