@inproceedings{discovery17016, publisher = {ASTRONOMICAL SOC PACIFIC}, year = {2006}, editor = {HJGLM Lamers and N Langer and T Nugis and K Annuk}, volume = {353}, title = {The role of non-gray model atmospheres in the evolution of low mass metal poor stars}, pages = {83 -- 90}, booktitle = {Stellar Evolution at Low Metallicity: Mass Loss, Explosions, Cosmology}, url = {https://discovery.ucl.ac.uk/id/eprint/17016/}, keywords = {THERMONUCLEAR REACTION-RATES, LINE LIST, STELLAR ATMOSPHERES, MOLECULAR OPACITIES, MAIN-SEQUENCE, INTENSITIES, STATE}, abstract = {Gray model atmospheres are generally considered a reasonable approximation to make upon stars of mass greater than about 0.6 M-circle dot. Here we show that non-gray atmospheres can significantly affect evolutionary models, with masses up to 0.9 M-circle dot. The effect of including a non-gray atmosphere is strongest in the pre-main and post-main Sequence. This may have implications for the ages of the oldest globular clusters.}, author = {Harris, GJ and Lynas-Gray, AE and Tennyson, J and Miller, S} }