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The Isochronal Age Scale of Young Moving Groups in the Solar Neighbourhood

Published online by Cambridge University Press:  27 January 2016

Cameron P. M. Bell ,
Eric E. Mamajek  and
Tim Naylor
Cameron P. M. Bell
Affiliation:
Department of Physics & Astronomy, University of Rochester, Rochester, NY 14627, USA email: cbell@pas.rochester.edu
Eric E. Mamajek
Affiliation:
Department of Physics & Astronomy, University of Rochester, Rochester, NY 14627, USA email: cbell@pas.rochester.edu
Tim Naylor
Affiliation:
School of Physics and Astronomy, University of Exeter, Exeter EX4 4QL, UK
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Abstract

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We present a self-consistent, absolute isochronal age scale for young (≲ 200 Myr), nearby (≲ 100 pc) moving groups, which is consistent with recent lithium depletion boundary ages for both the β Pic and Tucana-Horologium moving groups. This age scale was derived using a set of semi-empirical pre-main-sequence model isochrones that incorporate an empirical colour-Teff relation and bolometric corrections based on the observed colours of Pleiades members, with theoretical corrections for the dependence on logg. Absolute ages for young, nearby groups are vital as these regions play a crucial role in our understanding of the early evolution of low- and intermediate-mass stars, as well as providing ideal targets for direct imaging and other measurements of dusty debris discs, substellar objects and, of course, extrasolar planets.

Keywords

stars: evolution – stars: formation – stars: pre-main sequence – stars: fundamental parameters – techniques: photometric – solar neighbourhood – open clusters and associations: general – Hertzsprung-Russell and C-M diagrams
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 10 , Issue S314: Young Stars & Planets Near the Sun , November 2015 , pp. 41 - 48
Copyright
Copyright © International Astronomical Union 2016 

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