Planck 2018 结果. IX. 对原初非高斯性的限制
宇宙学与河外天体物理
2019-05-15 v1 广义相对论与量子宇宙学
高能物理 - 唯象学
高能物理 - 理论
摘要
我们分析 Planck 全任务宇宙微波背景（CMB）温度与 E 模式偏振图，以获得对原初非高斯性（NG）的限制。我们比较了由可分离模板拟合、分箱与模态双谱估计量得到的估计值，发现局部、等边与正交双谱振幅的值一致。我们联合温度与偏振分析得到如下结果：f_NL^local = -0.9 ± 5.1；f_NL^equil = -26 ± 47；以及 f_NL^ortho = -38 ± 24（68% CL，统计）。这些结果包含了低多极（4 <= l < 40）偏振数据，而未包含于我们之前的分析中，通过了大量检验，且相对于我们 2015 年的测量是稳定的。偏振双谱在稳健性上显示出显著改进；它们现在可独立用于设定 NG 限制。我们考虑了大量附加情形，例如尺度依赖特征与共振双谱、等曲率原初 NG，以及破宇称模型，其中我们也给出了严格限制但未探测到任何信号。非原初透镜双谱以相较 2015 年更高的显著性被探测到，在 3.5 sigma 水平排除零假设。我们给出 CMB 双谱的模型无关重构与分析。我们对局部三谱形状的最终限制为 g_NLl^local = (-5.8 ± 6.5) x 10^4（68% CL，统计），而其他三谱的限制也已确定。我们限制了不同早期宇宙情景的参数空间，包括一般的单场暴胀模型、多场与轴子场破宇称模型。我们的结果为结构形成情景提供了高精度检验，与关于初始条件统计的 LambdaCDM 宇宙学基本图像完全一致（节略）。
引用
@article{arxiv.1905.05697,
title = {Planck 2018 results. IX. Constraints on primordial non-Gaussianity},
author = {Planck Collaboration and Y. Akrami and F. Arroja and M. Ashdown and J. Aumont and C. Baccigalupi and M. Ballardini and A. J. Banday and R. B. Barreiro and N. Bartolo and S. Basak and K. Benabed and J. -P. Bernard and M. Bersanelli and P. Bielewicz and J. R. Bond and J. Borrill and F. R. Bouchet and M. Bucher and C. Burigana and R. C. Butler and E. Calabrese and J. -F. Cardoso and B. Casaponsa and A. Challinor and H. C. Chiang and L. P. L. Colombo and C. Combet and B. P. Crill and F. Cuttaia and P. de Bernardis and A. de Rosa and G. de Zotti and J. Delabrouille and J. -M. Delouis and E. Di Valentino and J. M. Diego and O. Doré and M. Douspis and A. Ducout and X. Dupac and S. Dusini and G. Efstathiou and F. Elsner and T. A. Enßlin and H. K. Eriksen and Y. Fantaye and J. Fergusson and R. Fernandez-Cobos and F. Finelli and M. Frailis and A. A. Fraisse and E. Franceschi and A. Frolov and S. Galeotta and K. Ganga and R. T. Génova-Santos and M. Gerbino and J. González-Nuevo and K. M. Górski and S. Gratton and A. Gruppuso and J. E. Gudmundsson and J. Hamann and W. Handley and F. K. Hansen and D. Herranz and E. Hivon and Z. Huang and A. H. Jaffe and W. C. Jones and G. Jung and E. Keihänen and R. Keskitalo and K. Kiiveri and J. Kim and N. Krachmalnicoff and M. Kunz and H. Kurki-Suonio and J. -M. Lamarre and A. Lasenby and M. Lattanzi and C. R. Lawrence and M. Le Jeune and F. Levrier and A. Lewis and M. Liguori and P. B. Lilje and V. Lindholm and M. López-Caniego and Y. -Z. Ma and J. F. Macías-Pérez and G. Maggio and D. Maino and N. Mandolesi and A. Marcos-Caballero and M. Maris and P. G. Martin and E. Martínez-González and S. Matarrese and N. Mauri and J. D. McEwen and P. D. Meerburg and P. R. Meinhold and A. Melchiorri and A. Mennella and M. Migliaccio and M. -A. Miville-Deschênes and D. Molinari and A. Moneti and L. Montier and G. Morgante and A. Moss and M. Münchmeyer and P. Natoli and F. Oppizzi and L. Pagano and D. Paoletti and B. Partridge and G. Patanchon and F. Perrotta and V. Pettorino and F. Piacentini and G. Polenta and J. -L. Puget and J. P. Rachen and B. Racine and M. Reinecke and M. Remazeilles and A. Renzi and G. Rocha and J. A. Rubiño-Martín and B. Ruiz-Granados and L. Salvati and M. Savelainen and D. Scott and E. P. S. Shellard and M. Shiraishi and C. Sirignano and G. Sirri and K. Smith and L. D. Spencer and L. Stanco and R. Sunyaev and A. -S. Suur-Uski and J. A. Tauber and D. Tavagnacco and M. Tenti and L. Toffolatti and M. Tomasi and T. Trombetti and J. Valiviita and B. Van Tent and P. Vielva and F. Villa and N. Vittorio and B. D. Wandelt and I. K. Wehus and A. Zacchei and A. Zonca},
journal= {arXiv preprint arXiv:1905.05697},
year = {2019}
}
备注
50 pages, 20 figures