{"id":2180,"date":"2015-03-23T11:47:03","date_gmt":"2015-03-23T18:47:03","guid":{"rendered":"http:\/\/www.deepspace.ucsb.edu\/?p=2180"},"modified":"2015-03-23T14:13:59","modified_gmt":"2015-03-23T21:13:59","slug":"planck-bicep-joint-analysis-of-gravity-wave-claim","status":"publish","type":"post","link":"http:\/\/128.111.23.62\/wordpress\/planck-bicep-joint-analysis-of-gravity-wave-claim","title":{"rendered":"Planck-BiCEP Analysis of Inflation Claim"},"content":{"rendered":"

The joint Planck – BiCEP team analysis of the March 2015 \u00a0reported gravity wave detection from inflation have been published and shows no significant evidence of gravity waves in the BiCEP data contrary to the Harvard Press announcement of March 17 2015. The primary issue was the incomplete accounting of dust contamination in the BiCEP field which mimics an inflationary signature.<\/p>\n

http:\/\/news.harvard.edu\/gazette\/story\/2014\/03\/backing-the-big-bang\/<\/a><\/p>\n

http:\/\/www.cosmos.esa.int\/web\/planck\/publications<\/a><\/p>\n

http:\/\/xxx.lanl.gov\/abs\/1502.00612<\/a><\/p>\n

A Joint Analysis of BICEP2\/Keck Array and Planck Data<\/p>\n

Authors: BICEP2\/Keck<\/a>, Planck Collaborations<\/a>: P. A. R. Ade<\/a>, N. Aghanim<\/a>, Z. Ahmed<\/a>, R. W. Aikin<\/a>, K. D. Alexander<\/a>, M. Arnaud<\/a>, J. Aumont<\/a>, C. Baccigalupi<\/a>, A. J. Banday<\/a>, D. Barkats<\/a>, R. B. Barreiro<\/a>, J. G. Bartlett<\/a>, N. Bartolo<\/a>, E. Battaner<\/a>, K. Benabed<\/a>, A. Benoit-L\u00e9vy<\/a>, S. J. Benton<\/a>, J.-P. Bernard<\/a>, M. Bersanelli<\/a>, P. Bielewicz<\/a>, C. A. Bischoff<\/a>, J. J. Bock<\/a>, A. Bonaldi<\/a>, L. Bonavera<\/a>, J. R. Bond<\/a>, J. Borrill<\/a>, F. R. Bouchet<\/a>, F. Boulanger<\/a>, J. A. Brevik<\/a>, M. Bucher<\/a>, I. Buder<\/a>, E. Bullock<\/a>, C. Burigana<\/a>, R. C. Butler<\/a>, V. Buza<\/a>, E. Calabrese<\/a>, J.-F. Cardoso<\/a>, A. Catalano<\/a>, A. Challinor<\/a>, R.-R. Chary<\/a>, H. C. Chiang<\/a>, P. R. Christensen<\/a>, L. P. L. Colombo<\/a>, C. Combet<\/a>, J. Connors<\/a>, F. Couchot<\/a>, A. Coulais<\/a>, B. P. Crill<\/a>, A. Curto<\/a>, F. Cuttaia<\/a>, L. Danese<\/a>, R. D. Davies<\/a>, R. J. Davis<\/a>, P. de Bernardis<\/a>, A. de Rosa<\/a>, G. de Zotti<\/a>, J. Delabrouille<\/a>,<\/p>\n

J.-M. Delouis<\/a>, F.-X. D\u00e9sert<\/a>, C. Dickinson<\/a>, J. M. Diego<\/a>, H. Dole<\/a>, S. Donzelli<\/a>, O. Dor\u00e9<\/a>, M. Douspis<\/a>, C. D. Dowell<\/a>, L. Duband<\/a>, A. Ducout<\/a>, J. Dunkley<\/a>, X. Dupac<\/a>, C. Dvorkin<\/a>, G. Efstathiou<\/a>, F. Elsner<\/a>, T. A. En\u00dflin<\/a>, H. K. Eriksen<\/a>, J. P. Filippini<\/a>, F. Finelli<\/a>, S. Fliescher<\/a>, O. Forni<\/a>, M. Frailis<\/a>, A. A. Fraisse<\/a>, E. Franceschi<\/a>, A. Frejsel<\/a>, S. Galeotta<\/a>, S. Galli<\/a>, K. Ganga<\/a>, T. Ghosh<\/a>, M. Giard<\/a>, E. Gjerl\u00f8w<\/a>, S. R. Golwala<\/a>, J. Gonz\u00e1lez-Nuevo<\/a>, K. M. G\u00f3rski<\/a>, S. Gratton<\/a>, A. Gregorio<\/a>, A. Gruppuso<\/a>, J. E. Gudmundsson<\/a>, M. Halpern<\/a>, F. K. Hansen<\/a>, D. Hanson<\/a>, D. L. Harrison<\/a>, M. Hasselfield<\/a>, G. Helou<\/a>, S. Henrot-Versill\u00e9<\/a>, D. Herranz<\/a>, S. R. Hildebrandt<\/a>, G. C. Hilton<\/a>, E. Hivon<\/a>, M. Hobson<\/a>, W. A. Holmes<\/a>, W. Hovest<\/a>, V. V. Hristov<\/a>, K. M. Huffenberger<\/a>, H. Hui<\/a>, G. Hurier<\/a>, K. D. Irwin<\/a>, A. H. Jaffe<\/a>, T. R. Jaffe<\/a>, J. Jewell<\/a>, W. C. Jones<\/a>, M. Juvela<\/a>, K. S. Karkare<\/a>, J. P. Kaufman<\/a>, B. G. Keating<\/a>, S. Kefeli<\/a>, E. Keih\u00e4nen<\/a>, S. A. Kernasovskiy<\/a>, R. Keskitalo<\/a>, T. S. Kisner<\/a>, R. Kneissl<\/a>, J. Knoche<\/a>, L. Knox<\/a>, J. M. Kovac<\/a>, N. Krachmalnicoff<\/a>, M. Kunz<\/a>, C. L. Kuo<\/a>, H. Kurki-Suonio<\/a>, G. Lagache<\/a>, A. L\u00e4hteenm\u00e4ki<\/a>, J.-M. Lamarre<\/a>, A. Lasenby<\/a>, M. Lattanzi<\/a>, C. R. Lawrence<\/a>, E. M. Leitch<\/a>, R. Leonardi<\/a>, F. Levrier<\/a>, A. Lewis<\/a>, M. Liguori<\/a>, P. B. Lilje<\/a>, M. Linden-V\u00f8rnle<\/a>, M. L\u00f3pez-Caniego<\/a>, P. M. Lubin<\/a>, M. Lueker<\/a>, J. F. Mac\u00edas-P\u00e9rez<\/a>, B. Maffei<\/a>, D. Maino<\/a>, N. Mandolesi<\/a>, A. Mangilli<\/a>, M. Maris<\/a>, P. G. Martin<\/a>, E. Mart\u00ednez-Gonz\u00e1lez<\/a>, S. Masi<\/a>, P. Mason<\/a>, S. Matarrese<\/a>, K. G. Megerian<\/a>, P. R. Meinhold<\/a>, A. Melchiorri<\/a>, L. Mendes<\/a>, A. Mennella<\/a>, M. Migliaccio<\/a>, S. Mitra<\/a>, M.-A. Miville-Desch\u00eanes<\/a>, A. Moneti<\/a>, L. Montier<\/a>, G. Morgante<\/a>, D. Mortlock<\/a>, A. Moss<\/a>, D. Munshi<\/a>, J. A. Murphy<\/a>, P. Naselsky<\/a>, F. Nati<\/a>, P. Natoli<\/a>, C. B. Netterfield<\/a>, H. T. Nguyen<\/a>, H. U. N\u00f8rgaard-Nielsen<\/a>, F. Noviello<\/a>, D. Novikov<\/a>, I. Novikov<\/a>, R. O’Brient<\/a>, R. W. Ogburn IV<\/a>, A. Orlando<\/a>, L. Pagano<\/a>, F. Pajot<\/a>, R. Paladini<\/a>, D. Paoletti<\/a>, B. Partridge<\/a>, F. Pasian<\/a>, G. Patanchon<\/a>, T. J. Pearson<\/a>, O. Perdereau<\/a>, L. Perotto<\/a>, V. Pettorino<\/a>, F. Piacentini<\/a>, M. Piat<\/a>, D. Pietrobon<\/a>, S. Plaszczynski<\/a>, E. Pointecouteau<\/a>, G. Polenta<\/a>, N. Ponthieu<\/a>, G. W. Pratt<\/a>, S. Prunet<\/a>, C. Pryke<\/a>, J.-L. Puget<\/a>, J. P. Rachen<\/a>, W. T. Reach<\/a>, R. Rebolo<\/a>, M. Reinecke<\/a>, M. Remazeilles<\/a>, C. Renault<\/a>, A. Renzi<\/a>, S. Richter<\/a>, I. Ristorcelli<\/a>, G. Rocha<\/a>, M. Rossetti<\/a>, G. Roudier<\/a>, M. Rowan-Robinson<\/a>, J. A. Rubi\u00f1o-Mart\u00edn<\/a>, B. Rusholme<\/a>, M. Sandri<\/a>, D. Santos<\/a>, M. Savelainen<\/a>, G. Savini<\/a>, R. Schwarz<\/a>, D. Scott<\/a>, M. D. Seiffert<\/a>, C. D. Sheehy<\/a>, L. D. Spencer<\/a>, Z. K. Staniszewski<\/a>, V. Stolyarov<\/a>, R. Sudiwala<\/a>, R. Sunyaev<\/a>, D. Sutton<\/a>, A.-S. Suur-Uski<\/a>, J.-F. Sygnet<\/a>, J. A. Tauber<\/a>, G. P. Teply<\/a>, L. Terenzi<\/a>, K. L. Thompson<\/a>, L. Toffolatti<\/a>, J. E. Tolan<\/a>, M. Tomasi<\/a>, M. Tristram<\/a>, M. Tucci<\/a>, A. D. Turner<\/a>, L. Valenziano<\/a>, J. Valiviita<\/a>, B. Van Tent<\/a>, L. Vibert<\/a>, P. Vielva<\/a>, A. G. Vieregg<\/a>, F. Villa<\/a>, L. A. Wade<\/a>, B. D. Wandelt<\/a>, R. Watson<\/a>, A. C. Weber<\/a>, I. K. Wehus<\/a>, M. White<\/a>, S. D. M. White<\/a>, J. Willmert<\/a>, C. L. Wong<\/a>, K. W. Yoon<\/a>, D. Yvon<\/a>, A. Zacchei<\/a>, A. Zonca<\/a><\/p>\n

et al. (216 additional authors not shown)<\/p>\n

(Submitted on 2 Feb 2015)<\/p>\n

Abstract: We report the results of a joint analysis of data from BICEP2\/Keck Array and Planck. BICEP2 and Keck Array have observed the same approximately 400 deg\u00a02\u00a0\u00a0 patch of sky centered on RA 0h, Dec. \u221257.5deg\u00a0 . The combined maps reach a depth of 57 nK deg in Stokes Q\u00a0 and U\u00a0 in a band centered at 150 GHz. Planck has observed the full sky in polarization at seven frequencies from 30 to 353 GHz, but much less deeply in any given region (1.2 \u03bc\u00a0 K deg in Q\u00a0 and U\u00a0 at 143 GHz). We detect 150\u00d7\u00a0 353 cross-correlation in B\u00a0 -modes at high significance. We fit the single- and cross-frequency power spectra at frequencies above 150 GHz to a lensed-\u039b\u00a0 CDM model that includes dust and a possible contribution from inflationary gravitational waves (as parameterized by the tensor-to-scalar ratio r\u00a0 ). We probe various model variations and extensions, including adding a synchrotron component in combination with lower frequency data, and find that these make little difference to the r\u00a0 constraint. Finally we present an alternative analysis which is similar to a map-based cleaning of the dust contribution, and show that this gives similar constraints. The final result is expressed as a likelihood curve for r\u00a0 , and yields an upper limit r\u00a00.05\u00a0<0.12\u00a0 at 95% confidence. Marginalizing over dust and r\u00a0 , lensing B\u00a0 -modes are detected at 7.0\u03c3\u00a0 significance.<\/p>\n

 <\/p>\n","protected":false},"excerpt":{"rendered":"

The joint Planck – BiCEP team analysis of the March 2015 \u00a0reported gravity wave detection from inflation have been published and shows no significant evidence of gravity waves in the BiCEP data contrary to the Harvard Press announcement of March 17 2015. The primary issue was the incomplete accounting of dust contamination in the BiCEP…<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[1],"tags":[],"_links":{"self":[{"href":"http:\/\/128.111.23.62\/wordpress\/wp-json\/wp\/v2\/posts\/2180"}],"collection":[{"href":"http:\/\/128.111.23.62\/wordpress\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/128.111.23.62\/wordpress\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/128.111.23.62\/wordpress\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"http:\/\/128.111.23.62\/wordpress\/wp-json\/wp\/v2\/comments?post=2180"}],"version-history":[{"count":0,"href":"http:\/\/128.111.23.62\/wordpress\/wp-json\/wp\/v2\/posts\/2180\/revisions"}],"wp:attachment":[{"href":"http:\/\/128.111.23.62\/wordpress\/wp-json\/wp\/v2\/media?parent=2180"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/128.111.23.62\/wordpress\/wp-json\/wp\/v2\/categories?post=2180"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/128.111.23.62\/wordpress\/wp-json\/wp\/v2\/tags?post=2180"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}