First Constraint on Cosmological Variation of the Proton-to-Electron Mass Ratio from Two Independent Telescopes

被引：59

作者：

van Weerdenburg, F. ^{[1
,2
]}

Murphy, M. T. ^{[3
]}

Malec, A. L. ^{[3
]}

Kaper, L. ^{[1
,2
]}

Ubachs, W. ^{[1
]}

机构：

[1] Vrije Univ Amsterdam, Inst Lasers Life & Biophoton, NL-1081 HV Amsterdam, Netherlands

[2] Univ Amsterdam, Astron Inst Anton Pannekoek, NL-1098 SJ Amsterdam, Netherlands

[3] Swinburne Univ Technol, Ctr Astrophys & Supercomp, Melbourne, Vic 3122, Australia

来源：

PHYSICAL REVIEW LETTERS | 2011年 / 106卷 / 18期

关键词：

FINE-STRUCTURE CONSTANT; LINE-OF-SIGHT; WAVELENGTH CALIBRATION; MOLECULAR-HYDROGEN; TIME-DEPENDENCE; SPECTRA; H-2; SPECTROGRAPH; ABSORPTION; UNIVERSE;

D O I：

10.1103/PhysRevLett.106.180802

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A high signal-to-noise spectrum covering the largest number of hydrogen lines (90 H(2) 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 Delta mu/mu = (8.5 +/- 3.6(stat) +/- 2.2(syst)) x 10(-6) at redshift z(abs) = 2.059, which agrees well with a recently published result on the same system observed at the Keck telescope yielding Delta mu/mu = (5.6 +/- 5.5(stat) +/- 2.9(syst)) x 10(-6). Both analyses used the same robust absorption line fitting procedures with detailed consideration of systematic errors.

引用

页数：4

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