Comments on: 376. A GRB detected at z=8.3 http://www.nonequilibrium.net/grb-detected-z83/ Cosmology, turbulence, markets, non-equilibrium QFT and much more. No nonsense, just science Sat, 24 Jul 2010 18:49:02 +0000 http://wordpress.org/?v=2.9.1 hourly 1 By: Into dark ages or again about GRB090423 | NEQNET: Non-equilibrium Phenomena http://www.nonequilibrium.net/grb-detected-z83/comment-page-1/#comment-9110 Into dark ages or again about GRB090423 | NEQNET: Non-equilibrium Phenomena Wed, 10 Jun 2009 08:11:36 +0000 http://www.nonequilibrium.net/?p=3460#comment-9110 [...] Back in April, I already wrote about GRB090423 - currently the most distant detected object in the Universe. Yesterday, the paper with details of [...] [...] Back in April, I already wrote about GRB090423 – currently the most distant detected object in the Universe. Yesterday, the paper with details of [...]

]]> By: NEQNET: Last two weeks of April | NEQNET: Non-equilibrium Phenomena http://www.nonequilibrium.net/grb-detected-z83/comment-page-1/#comment-8263 NEQNET: Last two weeks of April | NEQNET: Non-equilibrium Phenomena Sat, 02 May 2009 19:41:47 +0000 http://www.nonequilibrium.net/?p=3460#comment-8263 [...] A GRB detected at z=8.3 - the most distant object in the Universe so [...] [...] A GRB detected at z=8.3 – the most distant object in the Universe so [...]

]]> By: Dmitry http://www.nonequilibrium.net/grb-detected-z83/comment-page-1/#comment-8168 Dmitry Tue, 28 Apr 2009 18:37:40 +0000 http://www.nonequilibrium.net/?p=3460#comment-8168 Hi Lubos, Sure, that's what general lore says. Though, structure formation starts from random initial conditions - there were rare large fluctuations of [tex]\delta\rho[/tex] in our huge universe, so I am sure that we will find more GRBs at larger redshifts with better instruments :-) Still, that sounds too boring. <blockquote>And there would be no reason to think that the CMB remained so uniform etc.</blockquote> That's not really an argument since all the LSS (with [tex]\delta\rho{}/\rho{}>1[/tex]) formed during last 13 billion years does not really influence uniformity of CMB, does it? :-) But you are right suggesting that I don't have anything in my pocket to show except my severe disappointment by how life actually works :-) Another boring thing in physics: take an interval of energies before 1 TeV and GUT scale, that's quite a long interval, isn't it? The suggestion that there is no really interesting physics in this interval (compared to, say, the interval between [tex]10^{-3}[/tex] eV and 1 TeV :-) ) seems extremely boring to me :-) Cheers, Dmitry. Hi Lubos,

Sure, that’s what general lore says. Though, structure formation starts from random initial conditions – there were rare large fluctuations of \delta\rho in our huge universe, so I am sure that we will find more GRBs at larger redshifts with better instruments :-) Still, that sounds too boring.

And there would be no reason to think that the CMB remained so uniform etc.

That’s not really an argument since all the LSS (with \delta\rho{}/\rho{}&gt;1) formed during last 13 billion years does not really influence uniformity of CMB, does it? :-) But you are right suggesting that I don’t have anything in my pocket to show except my severe disappointment by how life actually works :-)

Another boring thing in physics: take an interval of energies before 1 TeV and GUT scale, that’s quite a long interval, isn’t it? The suggestion that there is no really interesting physics in this interval (compared to, say, the interval between 10^{-3} eV and 1 TeV :-) ) seems extremely boring to me :-)

Cheers,
Dmitry.

]]> By: Lubos Motl http://www.nonequilibrium.net/grb-detected-z83/comment-page-1/#comment-8166 Lubos Motl Tue, 28 Apr 2009 14:25:09 +0000 http://www.nonequilibrium.net/?p=3460#comment-8166 Don't you think that it is, on the contrary, very reasonable to "generously" give the Universe those 600 million years to relax before first structure formation took place? I am afraid that Universe took this vacation time even if someone doesn't wish so. ;-) If the Universe had to do many other things during all those years, it would really be incorrect to assume that it was ever uniform and free of structures. And there would be no reason to think that the CMB remained so uniform etc. Don’t you think that it is, on the contrary, very reasonable to “generously” give the Universe those 600 million years to relax before first structure formation took place? I am afraid that Universe took this vacation time even if someone doesn’t wish so. ;-)

If the Universe had to do many other things during all those years, it would really be incorrect to assume that it was ever uniform and free of structures. And there would be no reason to think that the CMB remained so uniform etc.

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