Planck 2015 结果. XVII. 对原初非高斯性的限制
宇宙学与河外天体物理
2016-07-26 v2
摘要
分析 Planck 全任务宇宙微波背景 (CMB) 温度和 E 模式偏振图以获得对原初非高斯性 (NG) 的限制。使用三类最优双谱估计量——可分离模板拟合 (KSW)、分箱和模态——我们获得局部、等边和正交双谱振幅的一致值，引述我们仅从温度得到的最终结果为 fNL^local=2.5+-5.7, fNL^equil=-16+-70 和 fNL^ortho=-34+-33 (68% CL)。结合温度和偏振数据我们得到 fNL^local=0.8+-5.0, fNL^equil=-4+-43 和 fNL^ortho=-26+-21 (68% CL)。结果基于这些估计量在模拟上的交叉验证，在成分分离技术间稳定，通过广泛测试套件，且与基于 Minkowski 泛函的测量一致。时域去毛刺系统效应对双谱的影响可忽略。尽管有这些测试结果，由于模拟与数据中噪声模型的已知不匹配，我们保守地将包含偏振数据的结果标记为初步。除 fNL 估计外，我们呈现 CMB 双谱的模型无关重建，并推导对产生 NG 的早期宇宙情景的限制，包括一般单场和轴子暴胀、初态修正、违反宇称的张量双谱以及方向依赖的矢量模型。我们还呈现尺度依赖振荡双谱的广泛调查，并寻找等曲率 NG。我们对原初三谱振幅的限制为 gNL^local=(-9.0+-7.7)x10^4 (68% CL)，并且我们对额外三谱形状进行分析。全局图景是与 LambdaCDM 宇宙学的前提一致，即我们今天观察到的结构源自绝热、被动、高斯和原初种子扰动。[删节]
引用
@article{arxiv.1502.01592,
title = {Planck 2015 results. XVII. Constraints on primordial non-Gaussianity},
author = {Planck Collaboration and P. A. R. Ade and N. Aghanim and M. Arnaud 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 E. Battaner and K. Benabed and A. Benoît and A. Benoit-Lévy and J. -P. Bernard and M. Bersanelli and P. Bielewicz and J. J. Bock and A. Bonaldi and L. Bonavera and J. R. Bond and J. Borrill and F. R. Bouchet and F. Boulanger and M. Bucher and C. Burigana and R. C. Butler and E. Calabrese and J. -F. Cardoso and A. Catalano and A. Challinor and A. Chamballu and H. C. Chiang and P. R. Christensen and S. Church and D. L. Clements and S. Colombi and L. P. L. Colombo and C. Combet and F. Couchot and A. Coulais and B. P. Crill and A. Curto and F. Cuttaia and L. Danese and R. D. Davies and R. J. Davis and P. de Bernardis and A. de Rosa and G. de Zotti and J. Delabrouille and F. -X. Désert and J. M. Diego and H. Dole and S. Donzelli and O. Doré and M. Douspis and A. Ducout and X. Dupac and G. Efstathiou and F. Elsner and T. A. Enßlin and H. K. Eriksen and J. Fergusson and F. Finelli and O. Forni and M. Frailis and A. A. Fraisse and E. Franceschi and A. Frejsel and S. Galeotta and S. Galli and K. Ganga and C. Gauthier and T. Ghosh and M. Giard and Y. Giraud-Héraud and E. Gjerløw and J. González-Nuevo and K. M. Górski and S. Gratton and A. Gregorio and A. Gruppuso and J. E. Gudmundsson and J. Hamann and F. K. Hansen and D. Hanson and D. L. Harrison and A. Heavens and G. Helou and S. Henrot-Versillé and C. Hernández-Monteagudo and D. Herranz and S. R. Hildebrandt and E. Hivon and M. Hobson and W. A. Holmes and A. Hornstrup and W. Hovest and Z. Huang and K. M. Huffenberger and G. Hurier and A. H. Jaffe and T. R. Jaffe and W. C. Jones and M. Juvela and E. Keihänen and R. Keskitalo and J. Kim and T. S. Kisner and J. Knoche and M. Kunz and H. Kurki-Suonio and F. Lacasa and G. Lagache and A. Lähteenmäki and J. -M. Lamarre and A. Lasenby and M. Lattanzi and C. R. Lawrence and R. Leonardi and J. Lesgourgues and F. Levrier and A. Lewis and M. Liguori and P. B. Lilje and M. Linden-Vørnle and M. López-Caniego and P. M. Lubin and J. F. Macías-Pérez and G. Maggio and D. Maino and N. Mandolesi and A. Mangilli and D. Marinucci and M. Maris and P. G. Martin and E. Martínez-González and S. Masi and S. Matarrese and P. McGehee and P. R. Meinhold and A. Melchiorri and L. Mendes and A. Mennella and M. Migliaccio and S. Mitra and M. -A. Miville-Deschênes and A. Moneti and L. Montier and G. Morgante and D. Mortlock and A. Moss and M. Münchmeyer and D. Munshi and J. A. Murphy and P. Naselsky and F. Nati and P. Natoli and C. B. Netterfield and H. U. Nørgaard-Nielsen and F. Noviello and D. Novikov and I. Novikov and C. A. Oxborrow and F. Paci and L. Pagano and F. Pajot and D. Paoletti and F. Pasian and G. Patanchon and H. V. Peiris and O. Perdereau and L. Perotto and F. Perrotta and V. Pettorino and F. Piacentini and M. Piat and E. Pierpaoli and D. Pietrobon and S. Plaszczynski and E. Pointecouteau and G. Polenta and L. Popa and G. W. Pratt and G. Prézeau and S. Prunet and J. -L. Puget and J. P. Rachen and B. Racine and R. Rebolo and M. Reinecke and M. Remazeilles and C. Renault and A. Renzi and I. Ristorcelli and G. Rocha and C. Rosset and M. Rossetti and G. Roudier and J. A. Rubiño-Martín and B. Rusholme and M. Sandri and D. Santos and M. Savelainen and G. Savini and D. Scott and M. D. Seiffert and E. P. S. Shellard and M. Shiraishi and K. Smith and L. D. Spencer and V. Stolyarov and R. Stompor and R. Sudiwala and R. Sunyaev and P. Sutter and D. Sutton and A. -S. Suur-Uski and J. -F. Sygnet and J. A. Tauber and L. Terenzi and L. Toffolatti and M. Tomasi and M. Tristram and A. Troja and M. Tucci and J. Tuovinen and L. Valenziano and J. Valiviita and F. Van Tent and P. Vielva and F. Villa and L. A. Wade and B. D. Wandelt and I. K. Wehus and D. Yvon and A. Zacchei and A. Zonca},
journal= {arXiv preprint arXiv:1502.01592},
year = {2016}
}
备注
68 pages, 32 figures, 31 tables. Subsection 6.3 on "Primordial curvature reconstruction" added; analysis in subsection 8.3 extended (paragraph "High frequency resonance model estimator" added); introduction to Section 10 and Appendix B added. This paper is one of a set associated with the 2015 data release from Planck. Matches version accepted for publication in Astronomy & Astrophysics