Variations of the fine-structure constant (Murphy+, 2009)

Details Variations of the fine-structure constant (Murphy+, 2009) Variations of the fine-structure constant (Murphy+, 2009)

Jan 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010ycatp037008001m&link_type=abstract

VizieR On-line Data Catalog: J/other/MmSAI/80.833. Originally published in: 2009MmSAI..80..833M

Physics

Atomic Physics

Atomic Physics, Qsos

Scientific paper

The Keck telescope's High Resolution Spectrograph (HIRES) has previously provided evidence for a smaller fine-structure constant, α, compared to the current laboratory value, in a sample of 143 quasar absorption systems: Δα/α=(-0.57+/-0.11)10-5^. The analysis was based on a variety of metal-ion transitions which, if alpha varies, experience different relative velocity shifts. This result is yet to be robustly contradicted, or confirmed, by measurements on other telescopes and spectrographs; it remains crucial to do so.
(2 data files).

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