tag:blogger.com,1999:blog-6976071487922527618.post8105816071491243609..comments2024-03-27T05:38:30.610+01:00Comments on Blank On The Map: BICEP2: reasons to be sceptical, part 2Sesh Nadathurhttp://www.blogger.com/profile/07155102110438904961noreply@blogger.comBlogger8125tag:blogger.com,1999:blog-6976071487922527618.post-45667813502147472142014-04-30T11:26:44.600+02:002014-04-30T11:26:44.600+02:00Hi Mario, thanks for the comment and I'm glad ...Hi Mario, thanks for the comment and I'm glad you liked these two installments. I haven't quite forgotten about the third one - but I have a series of four seminars in the next few days which I have been preparing my talks for, so blog writing has been on the back burner. But there will be a couple of evenings free in the next week so I'll put it out soon!Sesh Nadathurhttps://www.blogger.com/profile/07155102110438904961noreply@blogger.comtag:blogger.com,1999:blog-6976071487922527618.post-21177197554314933532014-04-21T22:59:05.810+02:002014-04-21T22:59:05.810+02:00Hey! Thanks for these two great answeres, I enjoye...Hey! Thanks for these two great answeres, I enjoyed it alot to read. I wonder whether you plan to write about the 3rd question, namely "how certain can we be that these gravitational waves were caused by inflation?". You said you wanted to create three blog-entries. Hope you will :-) Best regards, MarioAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-6976071487922527618.post-70146455316570170262014-04-09T18:37:08.191+02:002014-04-09T18:37:08.191+02:00thanks to the info from my father added insight th...thanks to the info from my father added insight thank you so much, may be useful for us all<br />sewa bus semaranghttp://www.sateran.com/sewa-bus-di-semarang-hub-089-668-668-000/noreply@blogger.comtag:blogger.com,1999:blog-6976071487922527618.post-30967228313771438542014-04-01T07:26:33.123+02:002014-04-01T07:26:33.123+02:00Excellent article.
"The chances are much high...Excellent article.<br />"The chances are much higher – I'd be tempted to say perhaps even as much as better than even money – that foregrounds contribute a part of the observed signal, and that therefore the actual value of the tensor-to-scalar ratio will come down from r=0.2, perhaps to as low as r=0.1, when Planck checks this result using their better dust mapping."<br />Good conclusion. Yet, there is a strong argument (at Scientia salon, http://scientiasalon.wordpress.com/2014/03/30/the-strange-phenomenon-of-the-cult-of-facts-three-case-studies/comment-page-1/#comment-300 ) which support the BICEP2 data as genuine.<br />Tienzenhttps://www.blogger.com/profile/05842156512465678309noreply@blogger.comtag:blogger.com,1999:blog-6976071487922527618.post-46425463621497015762014-03-28T15:54:58.381+01:002014-03-28T15:54:58.381+01:00A good read, Sesh.
I've read just about ever...A good read, Sesh. <br /><br />I've read just about everything going, and for myself, I'm now feeling doubtful. Not about the CMB polarization or the gravitational waves, but about the inflation. I've always accepted it, but now I'm saying WHY? Sean Carroll said "Faced with theories that fit all the data but seem unnatural, one can certainly shrug and say, 'Maybe that’s just the way it is'”. I'm now thinking yes, it’s the way it is, because of the way black holes have to be. Try to imagine a “frozen star” early universe. Everything starts out uniform and homogeneous and flat. Inflation is... superfluous. You can still have rapid initial expansion, and gravity waves. Indeed something akin to gravitational time dilation would mean the initial expansion would look very fast to any observers. But it isn't inflation as we know it. It doesn't solve the flatness problem or the horizon problem if there wasn't any problem to begin with. Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-6976071487922527618.post-29019755200159600432014-03-26T19:30:04.413+01:002014-03-26T19:30:04.413+01:00Einstein never said you needed inflation to confir...Einstein never said you needed inflation to confirm the existence of gravitational waves or the associated radiation. If gravitational radiation exist then gravitational waves exist. And gravitational radiation impact on the orbit of PSR 1913+16 was already confirmed. So gravitational waves are present now and highly detectable in other binary star systems.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-6976071487922527618.post-62543881377632507172014-03-25T13:33:16.061+01:002014-03-25T13:33:16.061+01:00Really?! I thought he was already completely sure ...Really?! I thought he was already completely sure that inflation did happen, I wonder why BICEP should have made him revise his number downwards? ;-)Sesh Nadathurhttps://www.blogger.com/profile/07155102110438904961noreply@blogger.comtag:blogger.com,1999:blog-6976071487922527618.post-64188069002265574492014-03-25T12:38:20.701+01:002014-03-25T12:38:20.701+01:00Tegmark now estimates the probability that some fo...Tegmark now estimates the probability that some form of inflation happened as 99%.<br />http://www.scottaaronson.com/blog/?p=1753#comment-102695 Max Tegmark, Comment #52, 23 March 2014David Brownhttps://www.blogger.com/profile/10537922851243581921noreply@blogger.com