Spatial variation of fundamental constants: Testing models with thermonuclear supernovae

被引:4
作者
Negrelli, C. [1 ,2 ]
Kraiselburd, L. [1 ,2 ]
Landau, S. [2 ,3 ,4 ]
Garcia-Berro, E. [5 ,6 ]
机构
[1] Univ Nacl La Plata, Fac Ciencias Astron & Geofis, Grp Astrofis Relatividad & Cosmol, Paseo Bosque S-N, RA-1900 La Plata, Buenos Aires, Argentina
[2] Consejo Nacl Invest Cient & Tecn, Godoy Cruz 2290, RA-1425 Buenos Aires, DF, Argentina
[3] Univ Buenos Aires, Fac Ciencias Exactas & Nat, Dept Fis, Ciudad Univ Pab 1, RA-1428 Buenos Aires, DF, Argentina
[4] Univ Buenos Aires, Fac Ciencias Exactas & Nat, IFIBA, Ciudad Univ Pab 1, RA-1428 Buenos Aires, DF, Argentina
[5] Univ Politecn Cataluna, Dept Fis, C Esteve Terrades 5, Castelldefels 08860, Spain
[6] Inst Space Studies Catalonia, C Gran Capita 24,Edif Nexus 201, Barcelona 08034, Spain
来源
INTERNATIONAL JOURNAL OF MODERN PHYSICS D | 2018年 / 27卷 / 09期
关键词
Quasars; absorption lines - cosmology; miscellaneous; -; supernovae; general; FINE-STRUCTURE CONSTANT; BARYON ACOUSTIC-OSCILLATIONS; TIME-VARIATION; COSMOLOGICAL VARIABILITY; CONSTRAINTS; CLOCKS;
D O I
10.1142/S0218271818500992
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
Since Dirac stated his Large Number Hypothesis the space-time variation of fundamental constants has been an active subject of research. Here we analyze the possible spatial variation of two fundamental constants: the fine structure constant alpha and the speed of light c. We study the effects of such variations on the luminosity distance and on the peak luminosity of Type Ia supernovae (SNe Ia). For this, we consider the change of each fundamental constant separately and discuss a dipole model for its variation. Elaborating upon our previous work, we take into account the variation of the peak luminosity of Type Ia supernovae resulting from the variation of each of these fundamental constants. Furthermore, we also include the change of the energy release during the explosion, which was not studied before in the literature. We perform a statistical analysis to compare the predictions of the dipole model for alpha and c variation with the Union 2.1 and JLA compilations of SNe Ia. Allowing the nuisance parameters of the distance estimator mu(0) and the cosmological density matter Omega(m) to vary. As a result of our analysis, we obtain a first estimate of the possible spatial variation of the speed of light c. On the other hand, we find that there is no significant difference between the several phenomenological models studied here and the standard cosmological model, in which fundamental constants do not vary at all. Thus, we conclude that the actual set of data of Type Ia supernovae does not allow to verify the hypothetical spatial variation of fundamental constants.
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页数:21
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