伽玛暴(Gamma-Ray Burst)笔记。记录有关伽玛暴的新文章,另外也包括看的老文章、自己的想法、以及跟天文相关的一些东西。 Feel free to leave me a message by comments or by email.

星期六, 三月 23, 2013

Ade 2013 Planck 2013年的结果

主要内容:
Planck卫星的观测放出了一大批结果,20多篇的系列文章,可能没有别的这么大的手笔了吧。都投到了A&A。这是它们的Overview。

总体上来说就像Planck发射的目标一样,得到了更加精细的结果。偏振数据还没放出来。

宇宙学参数有所改动(WMAP每次出新结果也改动了的):宇宙年龄比137长了点儿 138.2亿年,哈伯常数小了点儿H0 = (67+- 1.2) km s^-1Mpc^-1,暗能量的比例少了些,Omega_lambda:
 0.67+0.027-0.023 (68 % CL).

精彩摘抄:

所有文章的概述,那些文章干了啥。本文就主要是概述,列举了主要结果:frequency map, component map, power spectra, parameters


全天图,包括银河系等所有的源。
各波段的全天图
仅有微波背景辐射的全天图,可见比COBE和WMAP都更精细。

角向功率谱


功率密度谱

功率密度谱,和别的结果放在一张图上



宇宙学参数的结果






文章信息:

· Find Similar Abstracts (with default settings below)
· arXiv e-print (arXiv:1303.5062)
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Title:
Planck 2013 results. I. Overview of products and scientific results
Authors:
Planck CollaborationAde, P. A. R.Aghanim, N.Armitage-Caplan, C.Arnaud, M.Ashdown, M.Atrio-Barandela, F.Aumont, J.Baccigalupi, C.Banday, A. J.Barreiro, R. B.Bartelmann, M.Bartlett, J. G.Battaner, E.Benabed, K.Benoît, A.Benoit-Lévy, A.Bernard, J.-P.Bersanelli, M.Bielewicz, P.Bobin, J.Bock, J. J.Bonaldi, A.Bond, J. R.Borrill, J.Bouchet, F. R.Boulanger, F.Bowyer, J. W.Bridges, M.Bucher, M.Burigana, C.Butler, R. C.Cappellini, B.Cardoso, J.-F.Carr, R.Casale, M.;Catalano, A.Challinor, A.Chamballu, A.Chary, R.-R.Chen, X.Chiang, L.-YChiang, H. C.Christensen, P. R.Church, S.Clements, D. L.Colombi, S.Colombo, L. P. L.Couchot, F.Coulais, A.Crill, B. P.Curto, A.Cuttaia, F.Danese, L.;Davies, R. D.Davis, R. J.de Bernardis, P.de Rosa, A.de Zotti, G.Delabrouille, J.Delouis, J.-M.Désert, F.-X.Dickinson, C.Diego, J. M.Dole, H.Donzelli, S.Doré, O.Douspis, M.Dunkley, J.Dupac, X.Efstathiou, G.Enßlin, T. A.Eriksen, H. K.;Falgarone, E.Finelli, F.Foley, S.Forni, O.Frailis, M.Franceschi, E.Freschi, M.Fromenteau, S.Gaier, T. C.Galeotta, S.Gallegos, J.Gandolfo, B.Ganga, K.Giard, M.Giardino, G.Giraud-Héraud, Y.González-Nuevo, J.Górski, K. M.Gratton, S.;Gregorio, A.Gruppuso, A.Haissinski, J.Hansen, F. K.Hanson, D.Harrison, D.Helou, G.Henrot-Versillé, S.Hernández-Monteagudo, C.Herranz, D.Hildebrandt, S. R.Hivon, E.Hobson, M.Holmes, W. A.Hornstrup, A.Hovest, W.;Huffenberger, K. M.Jaffe, T. R.Jaffe, A. H.Jewell, J.Jones, W. C.Juvela, M.Kangaslahti, P.Keihänen, E.Keskitalo, R.Kisner, T. S.Kneissl, R.Knoche, J.Knox, L.Kunz, M.Kurki-Suonio, H.Lagache, G.Lähteenmäki, A.Lamarre, J.-M.;Lasenby, A.Laureijs, R. J.Lawrence, C. R.Le Jeune, M.Leach, S.Leahy, J. P.Leonardi, R.León-Tavares, J.Leroy, C.Lesgourgues, J.Liguori, M.Lilje, P. B.Linden-Vørnle, M.López-Caniego, M.Lowe, S.Lubin, P. M.Macías-Pérez, J. F.;Maffei, B.Maino, D.Mandolesi, N.Maris, M.Marshall, D. J.Martin, P. G.Martínez-González, E.Masi, S.Matarrese, S.Matthai, F.Mazzotta, P.McDonald, A.McGehee, P.Meinhold, P. R.Melchiorri, A.Melin, J.-B.Mendes, L.Mennella, A.;Migliaccio, M.Miniscalco, R.Mitra, S.Miville-Deschênes, M.-A.Moneti, A.Montier, L.Morgante, G.Mortlock, D.Moss, A.Munshi, D.Murphy, J. A.Naselsky, P.Nati, F.Natoli, P.Netterfield, C. B.Nørgaard-Nielsen, H. U.North, C.Noviello, F.;Novikov, D.Novikov, I.O'Dwyer, I. J.Osborne, S.Oxborrow, C. A.Paci, F.Pagano, L.Pajot, F.Paladini, R.Paoletti, D.Partridge, B.Pasian, F.Patanchon, G.Pearson, D.Pearson, T. J.Perdereau, O.Perotto, L.Perrotta, F.Piacentini, F.Piat, M.;Pierpaoli, E.Pietrobon, D.Plaszczynski, S.Platania, P.Pointecouteau, E.Polenta, G.Ponthieu, N.Popa, L.Poutanen, T.Pratt, G. W.Prézeau, G.Prunet, S.Puget, J.-L.Rachen, J. P.Reach, W. T.Rebolo, R.Reinecke, M.Remazeilles, M.Renault, C.;Ricciardi, S.Riller, T.Ristorcelli, I.Rocha, G.Rosset, C.Rossetti, M.Roudier, G.Rowan-Robinson, M.Rubiño-Martín, J. A.Rusholme, B.Salerno, E.Sandri, M.Santos, D.Savini, G.Scott, D.Seiffert, M. D.Shellard, E. P. S.Smoot, G. F.;Spencer, L. D.Starck, J.-L.Stolyarov, V.Stompor, R.Sudiwala, R.Sunyaev, R.Sureau, F.Sutton, D.Suur-Uski, A.-S.Sygnet, J.-F.Tauber, J. A.Tavagnacco, D.Taylor, D.Terenzi, L.Texier, D.Toffolatti, L.Tomasi, M.Tristram, M.Tucci, M.;Tuovinen, J.Türler, M.Tuttlebee, M.Umana, G.Valenziano, L.Valiviita, J.Van Tent, B.Varis, J.Vibert, L.Vielva, P.Villa, F.Vittorio, N.Wade, L. A.Wandelt, B. D.Watson, R.Watson, C.White, M.White, S. D. M.Wilkinson, A.Yvon, D.;Zacchei, A.Zonca, A.
Publication:
eprint arXiv:1303.5062
Publication Date:
03/2013
Origin:
ARXIV
Keywords:
Astrophysics - Cosmology and Extragalactic Astrophysics
Bibliographic Code:
2013arXiv1303.5062P

Abstract

The ESA's Planck satellite, dedicated to studying the early universe, was launched on May 2009 and has been surveying the microwave and submillimetre sky since August 2009. In March 2013, ESA and the Planck Collaboration publicly released the initial cosmology products based on the first 15.5 months of Planck operations, along with a set of scientific and technical papers and a web-based explanatory supplement. This paper describes the mission and its performance, and gives an overview of the processing and analysis of the data, the characteristics of the data, the main scientific results, and the science data products and papers in the release. Scientific results include robust support for the standard, six parameter LCDM model of cosmology and improved measurements for the parameters that define this model, including a highly significant deviation from scale invariance of the primordial power spectrum. The Planck values for some of these parameters and others derived from them are significantly different from those previously determined. Several large scale anomalies in the CMB temperature distribution detected earlier by WMAP are confirmed with higher confidence. Planck sets new limits on the number and mass of neutrinos, and has measured gravitational lensing of CMB anisotropies at 25 sigma. Planck finds no evidence for non-Gaussian statistics of the CMB anisotropies. There is some tension between Planck and WMAP results; this is evident in the power spectrum and results for some of the cosmology parameters. In general, Planck results agree well with results from the measurements of baryon acoustic oscillations. Because the analysis of Planck polarization data is not yet as mature as the analysis of temperature data, polarization results are not released. We do, however, illustrate the robust detection of the E-mode polarization signal around CMB hot- and cold-spots.


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在宇宙学方面的结果(还在别的领域也有结果的)

With the Planck data, we: (a) firmly establish a deviation from scale invariance for primordial matter perturbations, a key indicator of cosmic inflation; (b) detect with high significance lensing of the CMB by intervening matter, providing evidence for dark energy from the CMB alone; (c) find no evidence for significant deviations from Gaussianity in the statistics of CMB anisotropies; (d) find a low value of the Hubble constant, in tension with the value derived from the standard distance ladder; (e) find a deficit of power at low-`s with respect to our best-fit model; (f) confirm the anomalies at large angular scales first detected by WMAP; and (g) establish the number of neutrino species at three.

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