Planck 中期结果. XIII. 对特殊速度的限制
宇宙学与河外天体物理
2015-06-15 v3
摘要
利用 \Planck\ 数据结合 X 射线探测星系团总表 (MCXC)，我们通过寻找动力学 Sunyaev-Zeldovich 效应 (kSZ) 的证据来研究特殊运动。通过实现旨在提取星团位置处产生的 kSZ 的各种滤波器，我们在不同深度上对径向特殊速度平均值、均方根 (rms) 以及局部体流幅度获得了一致的限制。对于平均红移为 0.18 的整个星团样本，在该红移处相对于宇宙微波背景 (CMB) 辐射测量的平均径向特殊速度，即 kSZ 单极，为 km s。这不到该星团样本相对于我们本地 CMB 参考系的相对 Hubble 速度的 1%。虽然线性 CDM 模型对 处典型星团径向速度 rms 的预测接近 230km s，但 \Planck\ 数据对该星团子样本施加的上限在 95% 置信水平下对应于 800 km s，即高出约三倍。\Planck\ 数据还对以本星系群为中心的体积内的局部体流施加了强限制。在延伸至星团样本所覆盖的最大红移的任何共动球体中，均未探测到体流。对该样本中体流的盲搜上限为 254 km s（95% 置信水平），主要受限于 CMB 混淆和仪器噪声，表明宇宙在 Gpc 尺度上是高度均匀的。在此背景下，结合超新星观测，\Planck\ 能够排除一大类作为暗能量或修改引力替代方案的非均匀空洞模型。因此，\Planck\ 对特殊速度和体流的限制与 CDM 情景一致。
引用
@article{arxiv.1303.5090,
title = {Planck intermediate results. XIII. Constraints on peculiar velocities},
author = {Planck Collaboration and P. A. R. Ade and N. Aghanim and M. Arnaud and M. Ashdown and J. Aumont and C. Baccigalupi and A. Balbi and A. J. Banday and R. B. Barreiro and E. Battaner and K. Benabed and A. Benoit-Levy and J. -P. Bernard and M. Bersanelli and P. Bielewicz and I. Bikmaev and J. Bobin and J. J. Bock and A. Bonaldi and J. R. Bond and J. Borrill and F. R. Bouchet and C. Burigana and R. C. Butler and P. Cabella and J. -F. Cardoso and A. Catalano and A. Chamballu and L. -Y Chiang and G. Chon and P. R. Christensen and D. L. Clements and S. Colombi and L. P. L. Colombo and B. P. Crill and F. Cuttaia and A. Da Silva and H. Dahle and R. D. Davies and R. J. Davis and P. de Bernardis and G. de Gasperis and G. de Zotti and J. Delabrouille and J. Democles and J. M. Diego and K. Dolag and H. Dole and S. Donzelli and O. Dore and U. Doerl and M. Douspis and X. Dupac and T. A. Ensslin and F. Finelli and I. Flores-Cacho and O. Forni and M. Frailis and M. Frommert and S. Galeotta and K. Ganga and R. T. Genova-Santos and M. Giard and G. Giardino and J. Gonzalez-Nuevo and A. Gregorio and A. Gruppuso and F. K. Hansen and D. Harrison and C. Hernandez-Monteagudo and D. Herranz and S. R. Hildebrandt and E. Hivon and W. A. Holmes and W. Hovest and K. M. Huffenberger and G. Hurier and T. R. Jaffe and A. H. Jaffe and J. Jasche and W. C. Jones and M. Juvela and E. Keihanen and R. Keskitalo and I. Khamitov and T. S. Kisner and J. Knoche and M. Kunz and H. Kurki-Suonio and G. Lagache and A. Lahteenmaki and J. -M. Lamarre and A. Lasenby and C. R. Lawrence and M. Le Jeune and R. Leonardi and P. B. Lilje and M. Linden-Vornle and M. Lopez-Caniego and J. F. Macias-Perez and D. Maino and D. S. Y. Mak and N. Mandolesi and M. Maris and F. Marleau and E. Martinez-Gonzalez and S. Masi and S. Matarrese and P. Mazzotta and A. Melchiorri and J. -B. Melin and L. Mendes and A. Mennella and M. Migliaccio and S. Mitra and M. -A. Miville-Deschenes and A. Moneti and L. Montier and G. Morgante and D. Mortlock and A. Moss and D. Munshi and J. A. Murphy and P. Naselsky and F. Nati and P. Natoli and C. B. Netterfield and H. U. Norgaard-Nielsen and F. Noviello and D. Novikov and I. Novikov and S. Osborne and L. Pagano and D. Paoletti and O. Perdereau and F. Perrotta 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 T. Poutanen and G. W. Pratt and S. Prunet and J. -L. Puget and S. Puisieux and J. P. Rachen and R. Rebolo and M. Reinecke and M. Remazeilles and C. Renault and S. Ricciardi and M. Roman and J. A. Rubino-Martin and B. Rusholme and M. Sandri and G. Savini and D. Scott and L. Spencer and R. Sunyaev 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 M. Tucci and L. Valenziano and J. Valiviita and B. Van Tent and P. Vielva and F. Villa and N. Vittorio and L. A. Wade and N. Welikala and D. Yvon and A. Zacchei and J. P. Zibin and A. Zonca},
journal= {arXiv preprint arXiv:1303.5090},
year = {2015}
}
备注
23 pages (including affiliations), 14 figures, minor changes, matches accepted version in A&A