Coronal Heating & Solar Wind III
This is an edited copy of
post #3953 on
page 99 of the unmoderated thread "
Lambda-CDM Theory - Woo or not?", which has been marching along now since 10 February 2009. Obviously, the material below has nothing at all to do with that thread, a not unusual derail these days. I submit it to this thread as it is relevant and a reminder of points not yet effectively answered by those of an "alternative" frame of mind.
Zeuzz says: The coronal heating anomaly where the inverse square law of radiation is explicity violated is dually thermodynamically impossible if using the standard solar model. Still no theory has been backed up by adequate data to explain coronal heating, and coronal acceleration for that matter.
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The coronal heating anomaly where the inverse square law of radiation is explicity violated is dually thermodynamically impossible if using the standard solar model." That statement is factually false, there is no inverse square law violation of radiation. Evidently Zeuzzz does not understand the difference between radiant energy and particle kinetic energy, which is a pretty severe mistake for somebody who claims some expertise in physics. The kinetic temperature of the particles that make up the solar corona is on the order of 1,000,000 Kelvins, whereas the kinetic temperature of the particles that make up the solar photosphere, which lies below the corona, is roughly 5800 Kelvins. Since the
spontaneous flow of heat energy is in all cases from higher temperature to lower temperature, and never the other way around (
second law of thermodynamics), one might naively assume that this is an example a well established law of physics being violated. This is the "anomaly" to which Zeuzzz refers, and it has nothing at all to do with the inverse square law for radiation. It is also not an "anomaly" of any kind, although some who style themselves as alternative thinkers, but are actually rather careless thinkers, would like you to believe it is.
A moment of non-careless thinking will quickly reveal that a refrigerator prominently displays the transfer of heat from lower temperature regions inside the refrigerator to the higher temperature regions outside the refrigerator, in obvious violation of the fabled second law. Yet nobody seems upset about that, so what's the deal with these physics violating refrigerator things? The deal is that in a refrigerator, the transfer of heat is
not spontaneous. I draw your attention to the critical presence of the word "
not". Left to its own devices, water will always flow downhill, but we all know that it can be
pumped uphill. Likewise, heat energy can be
pumped "uphill", in the direction cold -> hot, as opposed to the natural direction hot -> cold. A refrigerator is simply a heat pump, which does work and expends energy and results in the pumping of heat "uphill". All one needs is a pumping mechanism and the "anomaly" of the corona becomes an interesting problem in physics, but violates no law of physics. So Zeuzzz is wrong on both counts: There is no "anomaly" at all, unless Zeuzzz is prepared to prove from first principles that any and all pumping mechanisms are impossible in this physical context, and since radiation is not involved, there is clearly no violation of the inverse square law for the decrease in radiation intensity.
And this leads us into the next topic ...
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Still no theory has been backed up by adequate data to explain coronal heating, and coronal acceleration for that matter." Not only is that statement factually incorrect, it is the exact opposite of the truth. There are in fact so many viable pumping mechanisms to choose from that the real scientific debate centers on which mechanisms are responsible for what fraction of the pumping, and whether or not there are still more pumping mechanisms that we have yet to elucidate. This is easy to determine with a cursory glance at the scientific literature. We should expect someone who claims knowledge & expertise in any field of science to at least have a minimal grasp of the published literature in that field.
These are all points I have made before:
Coronal Heating & Solar Wind I (17 April 2010). This matter of the alleged impossibility of the solar corona temperature compared to the photospheric temperature has never yet been properly addressed by those who have alternative models for solar physics. I just thought I would drop by and remind you all of this fact.