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

被引：60

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
Barrow, John D.
Lip, Sean Z. W.
[J]. PHYSICAL REVIEW D, 2012, 85 (02)
[2] Varying alpha: New constraints from seasonal variations
Barrow, John D.
Shaw, Douglas J.
[J]. PHYSICAL REVIEW D, 2008, 78 (06):
[3] New experimental limit on the validity of local position invariance
Bauch, A
Weyers, S
[J]. PHYSICAL REVIEW D, 2002, 65 (08) : 811011 - 811014
[4] FINE-STRUCTURE CONSTANT - IS IT REALLY A CONSTANT
BEKENSTEIN, JD
[J]. 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
Berengut, J. C.
Flambaum, V. V.
[J]. EPL, 2012, 97 (02)
[6] Isotope shifts and relativistic shifts of Cr II for the study of α variation in quasar absorption spectra
Berengut, J. C.
[J]. PHYSICAL REVIEW A, 2011, 84 (05):
[7] Isotope shift calculations in Ti II
Berengut, J. C.
Flambaum, V. V.
Kozlov, M. G.
[J]. 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
Berengut, JC
Flambaum, VV
Kozlov, MG
[J]. PHYSICAL REVIEW A, 2006, 73 (01)
[9] Calculation of relativistic and isotope shifts in MgI
Berengut, JC
Flambaum, VV
Kozlov, MG
[J]. PHYSICAL REVIEW A, 2005, 72 (04):
[10] New limits on coupling of fundamental constants to gravity using 87Sr optical lattice clocks
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.
[J]. PHYSICAL REVIEW LETTERS, 2008, 100 (14)

← 1 2 3 →