论文标题
伽马射线爆发,超新星IA和重子声学振荡:bined宇宙学分析
Gamma-Ray Bursts, Supernovae Ia and Baryon Acoustic Oscillations: a binned cosmological analysis
论文作者
论文摘要
任何红移的宇宙学探针对于始终如一地重建宇宙历史所必需。正确研究超新星IA型(SNE IA)获得的哈勃常数$ H_0 $,以及宇宙微波背景辐射的Planck测量值将需要在任何时期的距离指示器中进行完整的距离指示器样本。伽马射线爆发(GRB)对于上述任务是必需的,因为它们的巨大亮度使我们能够以非常高的红移延伸宇宙梯子。但是,仅将GRB用作标准蜡烛是具有挑战性的,因为它们的亮度差异很大。为此,我们选择具有非常小的固有散射的GRB的可靠相关性:校正了选择偏见和红移演化的GRB余气的所谓基本平面相关性。我们选择一个定义明确的样品:由50个长GRB组成的铂样品。为了进一步限制宇宙学参数,我们使用重子振荡(BAOS)作为标准统治者。因此,我们在红移的分析分析中应用了GRB,SNE IA和BAOS,以使GRB的贡献完全包括在最后一个RedShift箱中,该垃圾箱达到$ z = 5 $。我们将基本平面相关性与SNE IA和BAO一起使用,以限制$ H_0 $和今天的密度物质,$ω__{M} $。这种方法使我们能够评估GRB与SNE IA和BAOS结合的作用。我们已经使用GRBS+ SNE IA+ BAO的$ H_0 $和$ω__{M} $获得了比单独使用每个垃圾的SNE IA的结果,从而确认了Baos和Grbs的有益作用。此外,与SNE IA +BAO相比,获得GRB +SNE IA +BAO之间的一致结果,显示了GRB的重要性,因为距离梯子的扩展到$ Z = 5 $,并使用其他探针获得了类似的精确度,而没有包括GRB。
Cosmological probes at any redshift are necessary to reconstruct consistently the cosmic history. Studying properly the tension on the Hubble constant, $H_0$, obtained by Supernovae Type Ia (SNe Ia) and the Planck measurements of the Cosmic Microwave Background Radiation would require complete samples of distance indicators at any epoch. Gamma-Ray Bursts (GRBs) are necessary for the aforementioned task because of their huge luminosity that allows us to extend the cosmic ladder at very high redshifts. However, using GRBs alone as standard candles is challenging because their luminosity varies widely. To this end, we choose a reliable correlation for GRBs with a very small intrinsic scatter: the so-called fundamental plane correlation for GRB afterglows corrected for selection biases and redshift evolution. We choose a well-defined sample: the platinum sample, composed of 50 Long GRBs. To further constrain cosmological parameters, we use Baryon Acoustic Oscillations (BAOs) given their reliability as standard rulers. Thus, we have applied GRBs, SNe Ia, and BAOs in a binned analysis in redshifts so that GRBs' contribution is fully included in the last redshift bin, which reaches $z=5$. We use the fundamental plane correlation together with SNe Ia and BAOs, to constrain $H_0$ and the density matter today, $Ω_{M}$. This methodology allows us to assess the role of GRBs combined with SNe Ia and BAOs. We have obtained results for $H_0$ and $Ω_{M}$ using GRBs+ SNe Ia+BAOs with better precision than the SNe Ia alone for every bin, thus confirming the beneficial role of BAOs and GRBs added together. In addition, consistent results between GRBs+ SNe Ia +BAOs are obtained when compared with the SNe Ia +BAOs, showing the importance of GRBs since the distance ladder is extended up to $z=5$ with a similar precision obtained with other probes without including the GRBs.