Fundamental constants and high resolution spectroscopy

  title={Fundamental constants and high resolution spectroscopy},
  author={P. Bonifacio and H. Rahmani and J. B. Whitmore and M. Wendt and M. Centuri{\'o}n and P. Molaro and R. Srianand and M. Murphy and P. Petitjean and I. I. Agafonova and S. D'odorico and T. Evans and S. Levshakov and S. Lopez and C. Martins and D. Reimers and G. Paris and Iucaa and Centre for Astrophysics and Supercomputing and S. U. Technology and H. Sternwarte and Institut fur Astronomie and Universitat Potsdam and I. -. O. T. Iap and I. Institute and Eso and St.Petersburg Electrotechnical University LETI' and D. D. Astronom'ia and Universidad de Chile Centro de Astrof'isica and U. Porto},
  journal={Astronomische Nachrichten},
  • P. Bonifacio, H. Rahmani, +28 authors U. Porto
  • Published 2014
  • Physics
  • Astronomische Nachrichten
  • Absorption-line systems detected in high resolution quasar spectra can be used to compare the value of dimensionless fundamental constants such as the fine-structure constant, α, and the proton-to-electron mass ratio, μ = mp/me, as measured in remote regions of the Universe to their value today on Earth. In recent years, some evidence has emerged of small temporal and also spatial variations in α on cosmological scales which may reach a fractional level of ≈ 10 ppm (parts per million). We are… CONTINUE READING
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