Measuring the fine structure constant on a white dwarf surface; a detailed analysis of Fe V absorption in G191-B2B

J. Hu, J. K. Webb, T. R. Ayres +12

The gravitational potential phi = GM/Rc^2 at the surface of the white dwarf G191-B2B is 10,000 times stronger than that at the Earth's surface. Numerous photospheric absorption fea…