Limits on the Dependence of the Fine-Structure Constant on Gravitational Potential from White-Dwarf Spectra

被引：61

作者：

Berengut, J. C. ^{[1
]}

Flambaum, V. V. ^{[1
]}

Ong, A. ^{[1
]}

Webb, J. K. ^{[1
]}

Barrow, John D. ^{[2
]}

Barstow, M. A. ^{[3
]}

Preval, S. P. ^{[3
]}

Holberg, J. B. ^{[4
]}

机构：

[1] Univ New S Wales, Sch Phys, Sydney, NSW 2052, Australia

[2] Univ Cambridge, Ctr Math Sci, DAMTP, Cambridge CB3 0WA, England

[3] Univ Leicester, Dept Phys & Astron, Leicester LE1 7RH, Leics, England

[4] Univ Arizona, Lunar & Planetary Lab, Tucson, AZ 85721 USA

来源：

PHYSICAL REVIEW LETTERS | 2013年 / 111卷 / 01期

关键词：

PHYSICAL CONSTANTS; TIME-VARIATION; TERM ANALYSIS; ELEMENTS; G191-B2B; NICKEL; ALPHA;

D O I：

10.1103/PhysRevLett.111.010801

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We propose a new probe of the dependence of the fine-structure constant alpha on a strong gravitational field using metal lines in the spectra of white-dwarf stars. Comparison of laboratory spectra with far-UV astronomical spectra from the white-dwarf star G191-B2B recorded by the Hubble Space Telescope Imaging Spectrograph gives limits of Delta alpha/alpha = (4.2 +/- 1.6) x 10(-5) and (-6.1 +/- 5.8) x 10(-5) from FeV and NiV spectra, respectively, at a dimensionless gravitational potential relative to Earth of Delta phi approximate to 5 x 10(-5). With better determinations of the laboratory wavelengths of the lines employed these results could be improved by up to 2 orders of magnitude.

引用

页数：5

共 30 条

[1] Generalized theory of varying alpha [J].

Barrow, John D. ;

Lip, Sean Z. W. .

PHYSICAL REVIEW D, 2012, 85 (02)

[2] Varying alpha: New constraints from seasonal variations [J].

Barrow, John D. ;

Shaw, Douglas J. .

PHYSICAL REVIEW D, 2008, 78 (06)

[3] New experimental limit on the validity of local position invariance [J].

Bauch, A ;

Weyers, S .

PHYSICAL REVIEW D, 2002, 65 (08) :811011-811014

[4] FINE-STRUCTURE CONSTANT - IS IT REALLY A CONSTANT [J].

BEKENSTEIN, JD .

PHYSICAL REVIEW D, 1982, 25 (06) :1527-1539

[5] Manifestations of a spatial variation of fundamental constants in atomic and nuclear clocks, Oklo, meteorites, and cosmological phenomena [J].

Berengut, J. C. ;

Flambaum, V. V. .

EPL, 2012, 97 (02)

[6] Isotope shifts and relativistic shifts of Cr II for the study of α variation in quasar absorption spectra [J].

Berengut, J. C. .

PHYSICAL REVIEW A, 2011, 84 (05)

[7] Isotope shift calculations in Ti II [J].

Berengut, J. C. ;

Flambaum, V. V. ;

Kozlov, M. G. .

JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS, 2008, 41 (23)

[8] Calculation of isotope shifts and relativistic shifts in CI, CII, CIII, and CIV [J].

Berengut, JC ;

Flambaum, VV ;

Kozlov, MG .

PHYSICAL REVIEW A, 2006, 73 (01)

[9] Calculation of relativistic and isotope shifts in MgI [J].

Berengut, JC ;

Flambaum, VV ;

Kozlov, MG .

PHYSICAL REVIEW A, 2005, 72 (04)

[10] New limits on coupling of fundamental constants to gravity using 87Sr optical lattice clocks [J].

Blatt, S. ;

Ludlow, A. D. ;

Campbell, G. K. ;

Thomsen, J. W. ;

Zelevinsky, T. ;

Boyd, M. M. ;

Ye, J. ;

Baillard, X. ;

Fouche, M. ;

Le Targat, R. ;

Brusch, A. ;

Lemonde, P. ;

Takamoto, M. ;

Hong, F. -L. ;

Katori, H. ;

Flambaum, V. V. .

PHYSICAL REVIEW LETTERS, 2008, 100 (14)

← 1 2 3 →