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LHC: "WIMPs" Not Observed (6/4/12)
On 6/25/2012 9:08 AM, Eric Gisse wrote:
On Jun 24, 12:10 pm, Jos Bergervoet wrote: ... Zero. The only black holes that have been detected are ones that are stellar mass or higher. Same question. How are we sure they are *not* primordial? Basically the size of the accretion disk is a rough indicator, and a more quantitative notion is that iron gets ionized as it gets sucked down and emits some lines in the ~5-6KeV range that allow you to get a pretty good bead on the strength of the gravitational field there. There's nothing out there that is known to be consistent with being less than a solar mass. This still doesn't answer it.. Why can't those black holes of more than one solar mass be primordial? -- Jos |
#52
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LHC: "WIMPs" Not Observed (6/4/12)
On Jun 25, 2:01*pm, Jos Bergervoet wrote:
On 6/25/2012 9:08 AM, Eric Gisse wrote: On Jun 24, 12:10 pm, Jos Bergervoet wrote: * ... Zero. The only black holes that have been detected are ones that are stellar mass or higher. Same question. How are we sure they are *not* primordial? Basically the size of the accretion disk is a rough indicator, and a more quantitative notion is that iron gets ionized as it gets sucked down and emits some lines in the ~5-6KeV range that allow you to get a pretty good bead on the strength of the gravitational field there. There's nothing out there that is known to be consistent with being less than a solar mass. This still doesn't answer it.. Why can't those black holes of more than one solar mass be primordial? -- Jos In principle there's nothing but in practice black holes are only found by their accretion which tends to happen in bound systems of somesort which preclude being here from day one. OTOH the line blurs a bit when you think about supermassive black holes but my notion is "if it doesn't predate decoupling, it isn't primordial." |
#53
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LHC: "WIMPs" Not Observed (6/4/12)
On Jun 24, 3:37*am, "Robert L. Oldershaw"
wrote: Today, 6/28, NuSTAR should see its "first light". BTW, does anyone know why the Spektra-R research team has yet to announce any significant results from this new ground/satellite radio telescope that was supposed to generate exciting results. Their website does not give much information. RLO DSR |
#54
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LHC: "WIMPs" Not Observed (6/4/12)
On Jun 28, 10:50*am, "Robert L. Oldershaw"
wrote: On Jun 24, 3:37*am, "Robert L. Oldershaw" wrote: Today, 6/28, NuSTAR should see its "first light". BTW, does anyone know why the Spektra-R research team has yet to announce any significant results from this new ground/satellite radio telescope that was supposed to generate exciting results. *Their website does not give much information. RLO DSR Did you even look? http://www.asc.rssi.ru/radioastron/ -- Newsletter. From there you can see they are doing active science right now. If you are hoping for publications, don't hold your breath. The telescope hasn't even been in the sky a full year yet. In case you have not noticed, there is a substantial turnaround time when it comes to telescope data analysis. I'm still waiting for an analysis of the Planck data, for example. Besides it isn't as if your numerology will be vindicated, as neutron stars are an order of magnitude larger than what your 'definitive prediction' claims. This has been explained to you befo http://groups.google.com/group/sci.a...47e1ae48e860e0 Why do you continue to post to this newsgroup, Robert? Ignoring me doesn't mean that my posts are invisible, it just means you don't respond to them which looks pretty bad. |
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