TY - GEN PB - ASTRONOMICAL SOC PACIFIC UR - https://discovery.ucl.ac.uk/id/eprint/17016/ AV - public A1 - Harris, GJ A1 - Lynas-Gray, AE A1 - Tennyson, J A1 - Miller, S Y1 - 2006/// EP - 90 KW - THERMONUCLEAR REACTION-RATES KW - LINE LIST KW - STELLAR ATMOSPHERES KW - MOLECULAR OPACITIES KW - MAIN-SEQUENCE KW - INTENSITIES KW - STATE ID - discovery17016 SP - 83 TI - The role of non-gray model atmospheres in the evolution of low mass metal poor stars N2 - 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. ER -