标题： 从超新星推断的宇宙加速各向异性 显示英文标题

标题： Anisotropy in the cosmic acceleration inferred from supernovae

摘要： 在假设它们是标准（化）烛光的情况下，Ia 型超新星的光变曲线已在标准 Friedmann-Lemaître-Robertson-Walker 宇宙学框架下进行了分析，从而得出宇宙膨胀速度由于暗能量而加速的结论。虽然 1990 年代末期最初的声明使用了总计不到 100 颗超新星的重叠样本，但现在已有近 2000 颗超新星的目录可用。鉴于最近的发展，例如宇宙偶极异常和本地宇宙中比预期更大的整体流（未收敛于宇宙静止参考系），我们使用最大似然估计器分析了较新的数据集，并发现宇宙膨胀速度的加速显然是各向异性的。文献中的相关争论突显了将超新星用作标准可化烛光的艺术性，同时也提供了关于局部运动相对于宇宙哈勃膨胀偏离的一致相对论观点的更深入见解。我们作为处于深层整体流中的“倾斜观测者”的效应可能被误认为是宇宙加速。 显示英文摘要

摘要： Under the assumption that they are standard(isable) candles, the lightcurves of Type Ia supernovae have been analyzed in the framework of the standard Friedmann-Lema\^itre-Robertson-Walker cosmology to conclude that the expansion rate of the Universe is accelerating due to dark energy. While the original claims in the late 1990s were made using overlapping samples of less than 100 supernovae in total, catalogues of nearly 2000 supernovae are now available. In light of recent developments such as the cosmic dipole anomaly and the larger than expected bulk flow in the local Universe (which does not converge to the Cosmic Rest Frame), we analyze the newer datasets using a Maximum Likelihood Estimator and find that the acceleration of the expansion rate of the Universe is unequivocally anisotropic. The associated debate in the literature highlights the artifices of using supernovae as standardisable candles, while also providing deeper insights into a consistent relativistic view of peculiar motions as departures from the Hubble expansion of the Universe. The effects of our being `tilted observers' embedded in a deep bulk flow may have been mistaken for cosmic acceleration.