https://briankoberlein.com/2016/12/29/evidence-of-absence/ Brian Koberlein Tue, 19 Feb 2019 13:26:59 +0000 hourly 1 https://wordpress.org/?v=5.0.3 https://briankoberlein.com/2016/12/29/evidence-of-absence/#comment-5029 Mon, 20 Feb 2017 15:51:34 +0000 https://briankoberlein.com/?p=6419#comment-5029 If dark matter detectors have yet to find anything, based on current theoretical models, how can the lower-energy, diffuse observations from Fermi be ruled out so easily? It seems a bit arbitrary to do so. Though, I do not understand the physics to the degree that you do, so the explanation may very well be valid.

]]> https://briankoberlein.com/2016/12/29/evidence-of-absence/#comment-4919 Tue, 10 Jan 2017 23:02:35 +0000 https://briankoberlein.com/?p=6419#comment-4919 Oh I see the difference now, thanks for explaning

]]> https://briankoberlein.com/2016/12/29/evidence-of-absence/#comment-4918 Tue, 10 Jan 2017 22:31:02 +0000 https://briankoberlein.com/?p=6419#comment-4918 No, gamma rays are just everything above x-rays. In practical terms there’s an upper limit, but there’s no category of light with shorter wavelengths than gamma rays.

]]> https://briankoberlein.com/2016/12/29/evidence-of-absence/#comment-4917 Tue, 10 Jan 2017 22:26:33 +0000 https://briankoberlein.com/?p=6419#comment-4917 So if “Gamma rays are the most energetic forms of light in the Universe” would any energy level above that induce the matter that made it into a black hole?

]]> https://briankoberlein.com/2016/12/29/evidence-of-absence/#comment-4881 Fri, 30 Dec 2016 15:23:29 +0000 https://briankoberlein.com/?p=6419#comment-4881 One is the energy range, but the other is the distribution. We would expect to see strong gamma rays specifically at the boundary regions between galaxies, which we don’t.

]]> https://briankoberlein.com/2016/12/29/evidence-of-absence/#comment-4880 Fri, 30 Dec 2016 14:55:07 +0000 https://briankoberlein.com/?p=6419#comment-4880 Would also like to get your thoughts on this decaying dark matter idea. http://www.dailygalaxy.com/my_weblog/2016/12/hidden-mass-of-the-universe-has-decreased-since-big-bang-may-still-be-disintegrating.html

]]> https://briankoberlein.com/2016/12/29/evidence-of-absence/#comment-4879 Fri, 30 Dec 2016 01:13:05 +0000 https://briankoberlein.com/?p=6419#comment-4879 In no way does work like this invalidate the Nobel Prize that Vera Rubin didn’t get.

]]> https://briankoberlein.com/2016/12/29/evidence-of-absence/#comment-4877 Thu, 29 Dec 2016 19:01:25 +0000 https://briankoberlein.com/?p=6419#comment-4877 Getting back to the antimatter post from a few days ago – what about the gamma ray background excludes the possibility that it is produced by antimatter – matter collisions? Could there be a grouping of antimatter eg individual stars, or groups of stars, or galaxies etc that matches?

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