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Home List of Titles First constraint on cosmological variation of the proton-to-electron mass ratio from two independent telescopes
Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.3/192973
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- First constraint on cosmological variation of the proton-to-electron mass ratio from two independent telescopes
- van Weerdenburg, F.; Murphy, M. T.; Malec, A. L.; Kaper, L.; Ubachs, W.
- A high signal-to-noise spectrum covering the largest number of hydrogen lines (90 H2 lines and 6 HD lines) in a high-redshift object was analyzed from an observation along the sight line to the bright quasar source J2123-005 with the Ultraviolet and Visual Echelle Spectrograph on the European Southern Observatory Very Large Telescope (Paranal, Chile). This delivers a constraint on a possible variation of the proton-to-electron mass ratio of Δμ/μ=(8.5±3.6stat±2.2syst)×10-6 at redshift zabs=2.059, which agrees well with a recently published result on the same system observed at the Keck telescope yielding Δμ/μ=(5.6±5.5stat±2.9syst)×10-6. Both analyses used the same robust absorption line fitting procedures with detailed consideration of systematic errors.
- Publication type
- Journal article
- Research centre
- Swinburne University of Technology. Faculty of Information and Communication Technologies. Centre for Astrophysics and Supercomputing
- Physical Review Letters, Vol. 106, no. 18 (May 2011), article no. 180802
- Publication year
- FOR Code(s)
- 01 Mathematical Sciences; 02 Physical Sciences; 09 Engineering
- Cosmological variation; Proton-to-electron mass ratio; Redshifts
- American Physical Society
- Publisher URL
- Copyright © 2011 American Physical Society. Published version of the paper reproduced here for noncommercial use only with the kind permission of the publisher.
- Full text
- Peer reviewed