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#41
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One final point on CMBR
In article , Chalky
writes: The objection is: show me the theoretical prediction of the spectrum from your theory. I think you will find that presenting answers "out of the hat" from privileged knowledge of an unpublished theory would violate the sci.astro.research charter. Simplest answer, therefore, is: EFE is a valid solution to the relativistic axioms, to a first approximation. [Mod. note: we'll be happy to publish a rigorous, complete derivation of the observed CMB power spectrum starting from that 'simplest answer' whenever you feel able to submit one -- mjh] I agree that that would be completely on-topic for the newsgroup. Bring it on! |
#42
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One final point on CMBR
On Jul 11, 6:29 pm, Chalky wrote:
On Jul 11, 8:36 am, (Phillip Helbig--- remove CLOTHES to reply) wrote: In article , Chalky writes: You are the one who raised this 5th objection. If you are not prepared to disclose what the objection actually is, I do not have the spare time to wade through 239 thousand references in order to divine what it might be. The objection is: show me the theoretical prediction of the spectrum from your theory. I think you will find that presenting answers "out of the hat" from privileged knowledge of an unpublished theory would violate the sci.astro.research charter. Simplest answer, therefore, is: EFE is a valid solution to the relativistic axioms, to a first approximation. C. [Mod. note: we'll be happy to publish a rigorous, complete derivation of the observed CMB power spectrum starting from that 'simplest answer' whenever you feel able to submit one -- mjh] Surely you jest :-) . THIS forum is restricted to ASCII. The background thesis is already too big for the size constrains for journal submission, without that additional encumberment. We will distribute the body of this research in the way we choose, when we are completely ready. CMB anisotropy is NOT the first plact to look in order to distinguish between superior and inferior field equations. There is more substantive evidence elsewhere. We have already published Chalky's Law for you. You can start by sucking the bones on that. Charles (Oh No) has already served us the aperitif. For the main course, I would recommend a chi^2 test of the entire supernova data set (i.e.Gold + Silver + ESSENCE). For the sweet, I suggest you study Schaefer's GRB data again. Since GRB data interpretation is cosmological model dependent, Schaefer computed two sets of inferred luminosity distances. One based on the (locally concordant) best fit cosmology that Riess obtained from the Gold supernova set, the other based on the currently debated CMB data at the opposite end of the electromagnetic spectrum. As far as I can tell, Wright chose to adopt the locally DIScordant model of EFE for his analysis. If you adopt the more logical and locally CONcordant model of EFE, the resultant difference in slope is about half a magnitude. That is ample to again confirm which is the more accurate field equation. Chalky C |
#43
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One final point on CMBR
On 11 Jul, 08:58, Chalky wrote:
On Jul 8, 9:01 pm, George Dishman wrote: "Chalky" wrote in message ... Ergo, a microwave dish capable of detecting black body radiation at 2.7 K, is also a 2.7 K black body radiator, You jumped a step. The electrons in the HEMT transistors reach equilibrium which means the heat being coupled to them as a result of being in a physical piece of silicon is balanced by their radiation to space. That is at an electron temperature of around 20K from memory, not 2.7K. I think you may have jumped, actually. We have already established, if I recall correctly, that the LNAs which contain the HEMTs, are typically mounted in the pedestel. They are, therefore, outside of the "black body" Where they are mounted is of no direct relevance. The electrons involved in conduction are inside a tiny piece of silicon which is at some temperature. There is some transfer of heat from the silicon to the transistors and they the radiate through the dish. The external signal takes the reverse path, from the distant universe off the dish and eventually to the electrons. There is no "black body" in that path. Think of the path from dish to transistors like a waveguide where the signal bounces off the walls at grazing incidence hence near perfect reflectivity. That means near zero radiation from the walls. The transistors only "see" the distant universe and a trickle of heat conducted in from their surroundings. The amp merely amplifies what the antenna tells it of the radiation within this "black body". Yes, and adds some thermal noise due to basic thermodynamics, but that is set by the temperature of the electrons, not radiation from the signal path components. whose own radiation is in thermal equilibrium with its own matter. Therefore, we cannot say with any certainty where, and, more importantly, when, the observed CMB came from. You cannot be serious. I am simply exploring possibilities, and logical consequences of claims made by others. It was your suggestion that the temperature of the dish might be mistaken for an external signal that I found bizarre. One final point for you. Your original point relates to opacity of the neutral hydrogen gas after recombination. You may already be aware but if not I think you would find it of interest to look the characteristics and cause of the Lyman Alpha "forest". Specifically, why are there gaps between the trees ;-) I am not sure of your point here. This confirms obscuration does occur, but not at what gas density (at least not in the ref I read http://www.astro.ucla.edu/~wright/Ly...ha-forest.html My point is nicely illustrated there, the gas isn't uniform with some average density but is in small, high density clouds with near vacuum between. An attempt to calculate the opacity of a uniform gas will not give an accurate figure for the overall effect. confirms that the intervening gas is not homogeneously distributed by the time we can mostly see through it. No surprises there then. The other key point to note is that the absorbtion is mainly by the Lyman Alpha line so is blue-ward of ultra-violet staring around 1200A. The CMBR is of course a microwave signal so not affected by that. George |
#44
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One final point on CMBR
Thus spake Phillip Helbig---remove CLOTHES to reply
LOTHESvax.de In article , Oh No writes: Thus spake Phillip Helbig---remove CLOTHES to reply LOTHESvax.de You appear to be suggesting that observations on the microwave background are entirely consistent with theory. This is not true. The theory is that the Earth is a sphere; you are pointing out that it is pear-shaped on average and has structure at small scales (though, relatively, it is smoother than a billiard ball, so a sphere is not a bad approximation); Chalky is claiming it is a disk balanced on the shell of an enormous tortoise. Science isn't a collection of facts, it is a way of thinking. Collections of facts are the result of science. The normal procedure is progressive refinement. So if the Earth is a sphere today, it might be slightly pear-shaped tomorrow. No problem. But that doesn't mean that since the spherical theory has been disproved that it might as well be a disk, be hollow or whatever. One must be careful to distinguish between normal and healthy debate about the fine points of a theory with questioning the theory itself. To be honest, I don't even think Chalky's proposals are worthy of discussion. I am, however, concerned with the attitude that, since the earth is a sphere, mountains do not exist and evidence for them should be ignored. It is true that the progress of science is more evolutionary than revolutionary. If one looks carefully at, for example, Einstein's theories of special and general relativity, then one should recognise that they came from lines thought which had been evolved and developed by mathematicians for a couple of hundred of years at least. Had that not been the case differential geometry would not even have existed. Mostly apparent revolutions are the replacement of ideas which are not scientific, in this case Newtonian space and time, with scientific theory. Likewise the replacement of phlogiston theory of burning with the theory of oxygen. Similarly I would not place much store in a cosmological theory which throws out general relativity. A unified theory should successfully give standard quantum theory and standard general relativity in appropriate limits. There is, however, a great deal of modern cosmology which is not, imv, scientific. CDM has no basis in particle physics, and is actually contradicted by it. It is also contradicted by evidence from lensing, and by rotation curves of globular clusters. Yet it remains established just as phlogiston was once established. Inflation is little more than a wild speculation about the behaviour of space and time at a point close to a singularity, where an understanding of the mathematical ideas in general relativity should lead us to think that our ideas of space and time break down completely. The only difference I see between CDM and inflation and Chalky's tortoise is that the former two have the approval of the establishment. Before one develops such theories, one should understand what our current theories of space time and matter really say. Regards -- Charles Francis moderator sci.physics.foundations. substitute charles for NotI to email |
#45
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One final point on CMBR
On Jul 12, 10:36 am, "
wrote: On 11 Jul, 08:58, Chalky wrote: On Jul 8, 9:01 pm, George Dishman wrote: "Chalky" wrote in message ... Ergo, a microwave dish capable of detecting black body radiation at 2.7 K, is also a 2.7 K black body radiator, You jumped a step. The electrons in the HEMT transistors reach equilibrium which means the heat being coupled to them as a result of being in a physical piece of silicon is balanced by their radiation to space. That is at an electron temperature of around 20K from memory, not 2.7K. I think you may have jumped, actually. We have already established, if I recall correctly, that the LNAs which contain the HEMTs, are typically mounted in the pedestel. They are, therefore, outside of the "black body" Where they are mounted is of no direct relevance. The electrons involved in conduction are inside a tiny piece of silicon which is at some temperature. And that temperature IS of direct relevance. There is some transfer of heat from the silicon to the transistors and they the radiate through the dish. No. If they are located in the pedestel they conduct, convect, and radiate, externally too. The external signal takes the reverse path, from the distant universe off the dish and eventually to the electrons. There is no "black body" in that path. So you dispute everything claime hitherto. You reject the assertion that a perfect black body detector (over a specified range) is also a perfect black body radiator? C |
#46
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One final point on CMBR
In article , Oh No
writes: To be honest, I don't even think Chalky's proposals are worthy of discussion. I am, however, concerned with the attitude that, since the earth is a sphere, mountains do not exist and evidence for them should be ignored. I don't think anyone here suggested that. Refinements, unexpected discoveries etc are exciting. I only think that if person a) says the Earth is a sphere and person b) says "wait, there are mountains" that, first, a sphere is still a good approximation in some contexts (in some applications, a point mass is a fine approximation for a galaxy cluster!) and, second, this doesn't mean that we have to seriously consider the hypothesis that the Earth is flat. CDM has no basis in particle physics, and is actually contradicted by it. This would only be a point against CDM if particle physics were a complete theory, but no-one claims it is. In fact, investigating well motivated extensions to the standard model of particle physics is a vigorous field of research. It is also contradicted by evidence from lensing, and by rotation curves of globular clusters. Yet it remains established just as phlogiston was once established. Inflation is little more than a wild speculation about the behaviour of space and time at a point close to a singularity, where an understanding of the mathematical ideas in general relativity should lead us to think that our ideas of space and time break down completely. Note that the astrophysical evidence for CDM is completely independent of inflation. (Back when people believed the cosmological constant was zero, those who also believed that the universe must be flat, either because of inflation or for some other reason, were forced to postulate much more dark matter than there was astrophysical evidence for. But that's not the case today.) |
#47
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One final point on CMBR
In article , Chalky
writes: [Mod. note: we'll be happy to publish a rigorous, complete derivation of the observed CMB power spectrum starting from that 'simplest answer' whenever you feel able to submit one -- mjh] Surely you jest :-) . THIS forum is restricted to ASCII. The background thesis is already too big for the size constrains for journal submission, without that additional encumberment. You could post a URL here where people could read the stuff. |
#48
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One final point on CMBR
On Jul 11, 6:29 pm, Chalky wrote:
[Mod. note: we'll be happy to publish a rigorous, complete derivation of the observed CMB power spectrum starting from that 'simplest answer' whenever you feel able to submit one -- mjh] And I will be delighted to read your rigorous, complete derivation of the observed CMB power spectrum starting, ideally, from your derivation of the concordance model. [Mod. note: *I* am not claiming to have one in order to support my position: therefore it doesn't undermine my position that I don't produce it -- mjh] Chalky. |
#49
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learning to read statements in science with understanding
Chalky wrote:
" wrote: The external signal takes the reverse path, from the distant universe off the dish and eventually to the electrons. There is no "black body" in that path. So you dispute everything claime hitherto. You reject the assertion that a perfect black body detector (over a specified range) is also a perfect black body radiator? Give me strength. He made no such claim, so your statement is a strawman. Please _try_ to read what is written, it can't _possibly_ be as hard to do that as you make it look, and meanwhile you waste everyones time. He said there _is no_ black body in that path. Read the statement _as he wrote it_, still quoted above. That statement says _nothing whatever_ about the behavior of black bodies, as your strawman attempts to claim, it says instead that black bodies have precisely _nothing to do_ with the situation under discussion, since they occur nowhere in it. Quantum valeat. xanthian. |
#50
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One final point on CMBR
On Jul 12, 9:37 pm, Chalky wrote:
On Jul 12, 10:36 am, " wrote: On 11 Jul, 08:58, Chalky wrote: On Jul 8, 9:01 pm, George Dishman wrote: "Chalky" wrote in message ... Ergo, a microwave dish capable of detecting black body radiation at 2.7 K, is also a 2.7 K black body radiator, You jumped a step. The electrons in the HEMT transistors reach equilibrium which means the heat being coupled to them as a result of being in a physical piece of silicon is balanced by their radiation to space. That is at an electron temperature of around 20K from memory, not 2.7K. I think you may have jumped, actually. We have already established, if I recall correctly, that the LNAs which contain the HEMTs, are typically mounted in the pedestel. They are, therefore, outside of the "black body" Where they are mounted is of no direct relevance. The electrons involved in conduction are inside a tiny piece of silicon which is at some temperature. And that temperature IS of direct relevance. There is some transfer of heat from the silicon to the transistors and they the radiate through the dish. No. If they are located in the pedestel they conduct, convect, and radiate, externally too. The external signal takes the reverse path, from the distant universe off the dish and eventually to the electrons. There is no "black body" in that path. So you dispute everything claime hitherto. You reject the assertion that a perfect black body detector (over a specified range) is also a perfect black body radiator? I must admit I am very tempted to agree with George here, but this places us in a bit of a quandry. Either emissivity and absorbtivity are equal, or they aren't. If they are equal, any CMB detector will be manufacturing at least as much CMBR as it detects, so we can't say, with certainty, when the CMB came from. If they are not equal, all matter could be contributing to the CMBR, so we can't say, with certainty, when the CMB came from. It thus seems to me that it is very much a case of "damned if you do, and damned if you don't" when it comes to rationalisation of any cosmological model based on the CMB. Chalky. |
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