The ages of a-stars. I. Interferometric observations and age estimates for stars in the ursa major moving group

Jeremy Jones, R. J. White, T. Boyajian, G. Schaefer, E. Baines, M. Ireland, Jennifer Patience, T. Ten Brummelaar, H. McAlister, S. T. Ridgway, J. Sturmann, L. Sturmann, N. Turner, C. Farrington, P. J. Goldfinger