First constraint on cosmological variation of the proton-to-electron mass ratio from two independent telescopes

Дата и время публикации : 2011-04-15T06:56:16Z

Авторы публикации и институты :
Freek van Weerdenburg
Michael T. Murphy
Adrian L. Malec
Lex Kaper
Wim Ubachs

Ссылка на журнал-издание: Phys.Rev.Lett.106:180802,2011
Коментарии к cтатье: Accepted
Первичная категория: astro-ph.CO

Все категории : astro-ph.CO, physics.atom-ph

Краткий обзор статьи: 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$-$005 with the UVES spectrograph on the ESO Very Large Telescope (Paranal, Chile). This delivers a constraint on a possible variation of the proton-to-electron mass ratio of Dmu/mu = (8.5 pm 3.6_{stat} pm 2.2_{syst}) x 10^{-6} at redshift z=2.059$, which agrees well with a recently published result on the same system observed at the Keck telescope yielding Dmu/mu = (5.6 pm 5.5_{stat} pm 2.9_{syst}) x 10^{-6}. Both analyses used the same robust absorption line fitting procedures with detailed consideration of systematic errors.

Category: Physics