电磁Born-Infeld宇宙学的观测约束
Observational constraints on electromagnetic Born-Infeld cosmology
摘要：
用SNIa、GRB和直接哈勃参数等标准探测器检验了由电磁Born-Infeld（BI）场耦合Robertson-Walker几何构成的宇宙学模型。分析表明，包含的非线性电磁分量并没有在一个显着的方式所观察到的膨胀。BI电磁物质被认为具有丰富的$Ω_{BI}$，当用SNIa和哈勃参数数据进行测试时，我们的最佳拟合导致$Ω_{BI}=0.037$（0.1<z<1.75）;而用伽玛暴测试时，结果是$Ω_{BI}=0.304$，这可能表明在接近大结构出现的时期，这种电动力学是重要的（红移约为7），虽然这个后期的结果没有前两个探测器的结果那么可靠，因为我们知道伽玛暴数据的色散仍然是相当大的。鉴于这些结果，我们可以排除电磁玻恩-因菲尔德物质作为目前加速膨胀的起源，这个结论只涉及玻恩-因菲尔德理论。
英文摘要：
The cosmological model consisting of an electromagnetic Born-Infeld (BI) field coupled to a Robertson-Walker geometry is tested with the standard probes of SNIa, GRBs and direct Hubble parameter. The analysis shows that the inclusion of the nonlinear electromagnetic component does not contribute in a significative way to the observed expansion. The BI electromagnetic matter is considered with an abundance of $Ω_{BI}$, that our best fit leads to $Ω_{BI}=0.037$ when tested with SNIa and the Hubble parameter data (0.1<z<1.75); while when tested with GRBs the result is of $Ω_{BI}=0.304$, which may indicate that this electrodynamics was important at epochs close to the appearance of large structure (redshifts of approximately 7), although this late result has not as much reliability as that corresponding to the first two probes, since we know that the dispersion in GRBs data is still considerable. In view of these results we can rule out the electromagnetic Born-Infeld matter as the origin of the present accelerated expansion, this conclusion concerns exclusively the Born-Infeld theory.
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