{"id":7503,"date":"2015-01-29T18:37:48","date_gmt":"2015-01-29T23:37:48","guid":{"rendered":"http:\/\/www.math.columbia.edu\/~woit\/wordpress\/?p=7503"},"modified":"2015-03-12T14:40:55","modified_gmt":"2015-03-12T18:40:55","slug":"it-really-is-just-dust","status":"publish","type":"post","link":"https:\/\/www.math.columbia.edu\/~woit\/wordpress\/?p=7503","title":{"rendered":"It Really Is Just Dust"},"content":{"rendered":"<p>The Planck collaboration has an inimitable way of releasing important new results, they like to do it in French (see <a href=\"http:\/\/www.math.columbia.edu\/~woit\/wordpress\/?p=7394\">here<\/a> for instance).  Tonight a French Planck website contains the long-awaited <a href=\"http:\/\/public.planck.fr\/resultats\/253-la-reponse-de-bicep2-keck-planck\">news of the results from the BICEP2\/Keck\/Planck collaboration<\/a> to reanalyze the BICEP2 data on polarized B-modes, in a way that allows proper estimation of the contribution of dust.  The bottom line is that the BICEP2 claims of seeing a primordial r=.16-.20 that got a huge amount of media attention last year have been shot down.  The new analysis says that r is less than .13.   I don&#8217;t see a paper yet, rumor is that the paper will be on the arXiv Monday night.<\/p>\n<p>My understanding is that full polarization results from Planck&#8217;s own data are still not quite ready, as has been the case for quite a while now.<\/p>\n<p>Hat tip for this news to Steve (retired LLNL physicist).  Thanks Steve!<\/p>\n<p><strong>Update<\/strong>: The Planck collaboration now has <a href=\"http:\/\/www.esa.int\/Our_Activities\/Space_Science\/Planck\/Planck_gravitational_waves_remain_elusive\">information available<\/a> about this (in English!).  An NSF version is <a href=\"http:\/\/www.nsf.gov\/news\/news_summ.jsp?cntn_id=134013\">here<\/a>, NBC News <a href=\"http:\/\/www.nbcnews.com\/science\/space\/physicists-say-dust-over-big-bang-gravity-waves-has-fizzled-n296642\">here<\/a>.  It still looks like we&#8217;ll have to wait until next week for the paper, which has been submitted to PRL.<\/p>\n<p><strong>Update<\/strong>: The paper is now available <a href=\"http:\/\/new.bicepkeck.org\/\">here<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The Planck collaboration has an inimitable way of releasing important new results, they like to do it in French (see here for instance). Tonight a French Planck website contains the long-awaited news of the results from the BICEP2\/Keck\/Planck collaboration to &hellip; <a href=\"https:\/\/www.math.columbia.edu\/~woit\/wordpress\/?p=7503\">Continue reading <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-7503","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.math.columbia.edu\/~woit\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/7503","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.math.columbia.edu\/~woit\/wordpress\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.math.columbia.edu\/~woit\/wordpress\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.math.columbia.edu\/~woit\/wordpress\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.math.columbia.edu\/~woit\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=7503"}],"version-history":[{"count":5,"href":"https:\/\/www.math.columbia.edu\/~woit\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/7503\/revisions"}],"predecessor-version":[{"id":7520,"href":"https:\/\/www.math.columbia.edu\/~woit\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/7503\/revisions\/7520"}],"wp:attachment":[{"href":"https:\/\/www.math.columbia.edu\/~woit\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=7503"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.math.columbia.edu\/~woit\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=7503"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.math.columbia.edu\/~woit\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=7503"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}