First Cosmological Constraints on the Proton-to-electron Mass Ratio from Observations of Rotational Transitions of Methanol

@article{Ellingsen2012FirstCC,
  title={First Cosmological Constraints on the Proton-to-electron Mass Ratio from Observations of Rotational Transitions of Methanol},
  author={S. Ellingsen and M. Voronkov and S. Breen and J.E.J. Lovell School of Mathematics and Physics and University of Tasmania Csiro Astronomy and S. Science},
  journal={The Astrophysical Journal},
  year={2012},
  volume={747},
  pages={1-5}
}
  • S. Ellingsen, M. Voronkov, +4 authors S. Science
  • Published 2012
  • Physics
  • The Astrophysical Journal
  • We have used the Australia Telescope Compact Array to measure the absorption from the 2{sub 0} {yields} 3{sub -1} E 12.2 GHz transition of methanol toward the z = 0.89 lensing galaxy in the PKS B1830-211 gravitational lens system. Comparison of the velocity of the main absorption feature with the published absorption spectrum from the 1{sub 0} {yields} 2{sub -1} E transition of methanol shows that they differ by -0.6 {+-} 1.6 km s{sup -1}. We can use these observations to constrain the changes… CONTINUE READING
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