分形气泡宇宙学:一个和谐的宇宙学模型?
Fractal Bubble Cosmology: A concordant cosmological model?
摘要:
分形气泡模型被认为是一种可行的宇宙学,它不需要暗能量来解释宇宙加速,而是将其观测特征归因于结构的形成。在本文中,它表明,与以前的研究结果相比,该模型是不是一个很好的宇宙学超新星数据拟合,有显着的张力,从不同的样本中获得的最佳拟合参数,而LCDM是能够适应所有的数据集一致。此外,星系团规模和宇宙微波背景的数据之间的一致性是没有实现与最近的超新星汇编。FB形式主义作为一个健全的宇宙学模型的有效性进一步受到挑战,因为它表明,以前的研究这个模型实现一致性,需要一个值,为今天的哈勃常数,是来自超新星数据包含任意距离归一化。
英文摘要:
The Fractal Bubble model has been proposed as a viable cosmology that does not require dark energy to account for cosmic acceleration, but rather attributes its observational signature to the formation of structure. In this paper it is demonstrated that, in contrast to previous findings, this model is not a good fit to cosmological supernovae data; there is significant tension in the best fit parameters obtained from different samples, whereas LCDM is able to fit all datasets consistently. Furthermore, the concordance between galaxy clustering scales and data from the cosmic microwave background is not achieved with the most recent supernova compilations. The validity of the FB formalism as a sound cosmological model is further challenged as it is shown that previous studies of this model achieve concordance by requiring a value for the present day Hubble constant that is derived from supernovae data containing an arbitrary distance normalisation.
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