دورية أكاديمية
Planck 2018 results: IX. Constraints on primordial non-Gaussianity
| العنوان: | Planck 2018 results: IX. Constraints on primordial non-Gaussianity |
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| المؤلفون: | Akrami, Y., Arroja, F., Ashdown, M., Aumont, J., Baccigalupi, C., Ballardini, M., Banday, A. J., Barreiro, R. B., Bartolo, N., Basak, S., Benabed, K., Bernard, J. -p., Bersanelli, M., Bielewicz, P., Bond, J. R., Borrill, J., Bouchet, F. R., Bucher, M., Burigana, C., Butler, R. C., Calabrese, E., Cardoso, J. -f., Casaponsa, B., Challinor, A., Chiang, H. C., Colombo, L. P. L., Combet, C., Crill, B. P., Cuttaia, F., De Bernardis, P., De Rosa, A., De Zotti, G., Delabrouille, J., Delouis, Jean Marc, Di Valentino, E., Diego, J. M., Dore, O., Douspis, M., Ducout, A., Dupac, X., Dusini, S., Efstathiou, G., Elsner, F., Ensslin, T. A., Eriksen, H. K., Fantaye, Y., Fergusson, J., Fernandez-cobos, R., Finelli, F., Frailis, M., Fraisse, A. A., Franceschi, E., Frolov, A., Galeotta, S., Galli, S., Ganga, K., Genova-santos, R. T., Gerbino, M., Gonzalez-nuevo, J., Gorski, K. M., Gratton, S., Gruppuso, A., Gudmundsson, J. E., Hamann, J., Handley, W., Hansen, F. K., Herranz, D., Hivon, E., Huang, Z., Jaffe, A. H., Jones, W. C., Jung, G., Keihanen, E., Keskitalo, R., Kiiveri, K., Kim, J., Krachmalnicoff, N., Kunz, M., Kurki-suonio, H., Lamarre, J. -m., Lasenby, A., Lattanzi, M., Lawrence, C. R., Le Jeune, M., Levrier, F., Lewis, A., Liguori, M., Lilje, P. B., Lindholm, V., Lopez-caniego, M., Ma, Y. -z., Macias-perez, J. F., Maggio, G., Maino, D., Mandolesi, N., Marcos-caballero, A., Maris, M., Martin, Pg, Martinez-gonzalez, E., Matarrese, S., Mauri, N., Mcewen, J. D., Meerburg, P. D., Meinhold, P. R., Melchiorri, A., Mennella, A., Migliaccio, M., Miville-deschenes, M. -a., Molinari, D., Moneti, A., Montier, L., Morgante, G., Moss, A., Munchmeyer, M., Natoli, P., Oppizzi, F., Pagano, L., Paoletti, D., Partridge, B., Patanchon, G., Perrotta, F., Pettorino, V., Piacentini, F., Polenta, G., Puget, J. -l., Rachen, J. P., Racine, B., Reinecke, M., Remazeilles, M., Renzi, A., Rocha, G., Rubino-martin, J. A., Ruiz-granados, B., Salvati, L., Savelainen, M., Scott, D., Shellard, E. P. S., Shiraishi, M., Sirignano, C., Sirri, G., Smith, K., Spencer, L. D., Stanco, L., Sunyaev, R., Suur-uski, A. -s., Tauber, J. A., Tavagnacco, D., Tenti, M., Toffolatti, L., Tomasi, M., Trombetti, T., Valiviita, J., Van Tent, B., Vielva, P., Villa, F., Vittorio, N., Wandelt, B. D., Wehus, I. K., Zacchei, A., Zonca, A. |
| المصدر: | Astronomy & Astrophysics (0004-6361) (Edp Sciences S A), 2020-09 , Vol. 641 , N. A9 , P. 47p. |
| بيانات النشر: | Edp Sciences S A |
| سنة النشر: | 2020 |
| المجموعة: | Ifremer (French Research Institute for Exploitation of the Sea): Archimer |
| مصطلحات موضوعية: | cosmic background radiation, cosmology: observations, cosmology: theory, early Universe, inflation, methods: data analysis |
| الوصف: | We analyse the Planck full-mission cosmic microwave background (CMB) temperature and E-mode polarization maps to obtain constraints on primordial non-Gaussianity (NG). We compare estimates obtained from separable template-fitting, binned, and optimal modal bispectrum estimators, finding consistent values for the local, equilateral, and orthogonal bispectrum amplitudes. Our combined temperature and polarization analysis produces the following final results: (local)(NL) = -0.9 +/- 5.1 f NL local = - 0.9 +/- 5.1 ; f(NL)(equil) = -26 +/- 47 f NL equil = - 26 +/- 47 ; and f(NL)(ortho) = -38 +/- 24 f NL ortho = - 38 +/- 24 (68% CL, statistical). These results include low-multipole (4 <= l< 40) polarization data that are not included in our previous analysis. The results also pass an extensive battery of tests (with additional tests regarding foreground residuals compared to 2015), and they are stable with respect to our 2015 measurements (with small fluctuations, at the level of a fraction of a standard deviation, which is consistent with changes in data processing). Polarization-only bispectra display a significant improvement in robustness; they can now be used independently to set primordial NG constraints with a sensitivity comparable to WMAP temperature-based results and they give excellent agreement. In addition to the analysis of the standard local, equilateral, and orthogonal bispectrum shapes, we consider a large number of additional cases, such as scale-dependent feature and resonance bispectra, isocurvature primordial NG, and parity-breaking models, where we also place tight constraints but do not detect any signal. The non-primordial lensing bispectrum is, however, detected with an improved significance compared to 2015, excluding the null hypothesis at 3.5. Beyond estimates of individual shape amplitudes, we also present model-independent reconstructions and analyses of the Planck CMB bispectrum. Our final constraint on the local primordial trispectrum shape is g(NL)(local) = (-5.8 +/- 6.5) x 10(4) ... |
| نوع الوثيقة: | article in journal/newspaper |
| وصف الملف: | application/pdf |
| اللغة: | English |
| العلاقة: | https://archimer.ifremer.fr/doc/00654/76635/77783.pdfTest; https://archimer.ifremer.fr/doc/00654/76635Test/ |
| DOI: | 10.1051/0004-6361/201935891 |
| الإتاحة: | https://doi.org/10.1051/0004-6361/201935891Test https://archimer.ifremer.fr/doc/00654/76635/77783.pdfTest https://archimer.ifremer.fr/doc/00654/76635Test/ |
| حقوق: | info:eu-repo/semantics/openAccess ; restricted use |
| رقم الانضمام: | edsbas.BF2EC850 |
| قاعدة البيانات: | BASE |
| DOI: | 10.1051/0004-6361/201935891 |
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