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Markus J. Aschwanden Submitted: 2007-03-20 15:39
we look back over the last 6 decades in solar physics and contemplate about 10 outstanding problems (or research focii) in solar physics:
(1) The solar neutrino problem,
(2) Structure of the solar interior (helioseismoloy),
(3) The solar magnetic field (dynamo, solar cycle, corona),
(4) Hydrodynamics of coronal loops, -
(5) MHD oscillations and waves (coronal seismology),
(6) The coronal heating problem,
(7) Self-organized criticality (from nanoflares to giant flares,
(8) Magnetic reconnection processes,
(9) Particle acceleration processes,
(10) Coronal mass ejections and coronal dimming.
The first two problems have been largely solved, recently, while the other 8 selected problems are still pending a final solution, and thus remain persistent Challenges for the next Solar Cycle 24, the theme of this jubilee conference.
During the past 50 years there have been many attempts to solve this outstanding problem in astrophysics, and there are more than 20 different models and mechanisms for coronal heating proposed in the literature; see reviews [6–8]
In the page on Electric Plasma the three characteristic static modes in which a plasma can operate are discussed. Here is a more detailed description. The volt-ampere characteristic of a typical plasma discharge has the general shape shown below.
The volt-ampere plot of a plasma discharge.
This plot is easily measured for a laboratory plasma contained in a column - a cylindrical glass tube with the anode at one end and the cathode at the other. These two terminals are connected into an electrical circuit whereby the current through the tube can be controlled. In such an experiment, the plasma has a constant cross-sectional area from one end of the tube to the other. The vertical axis of the volt-ampere plot is the voltage rise from the cathode up to the anode (across the entire plasma) as a function of the current passing through the plasma. The horizontal axis shows the Current Density. Current density is the measurement of how many Amps per square meter are flowing through a cross-section of the tube. In a cylindrical tube the cross-section is the same size at all points along the tube and so, the current density at every cross-section is just proportional to the total current passing through the plasma.
When we consider the Sun, however, a spherical geometry exists - with the sun at the center. The cross-section becomes an imaginary sphere. Assume a constant total electron drift moving from all directions toward the Sun and a constant total radial flow of +ions outward. Imagine a spherical surface of large radius through which this total current passes. As we approach the Sun from deep space, this spherical surface has an ever decreasing area. Therefore, for a fixed total current, the current density (A/m^2) increases as we move inward toward the Sun.
* In deep space the current density there is extremely low even though the total current may be huge; we are in the dark current region; there are no glowing gases, nothing to tell us we are in a plasma discharge - except possibly some radio frequency emissions.
* As we get closer to the Sun, the spherical boundary has a smaller surface area; the current density increases; we enter the normal glow region; this is what we call the Sun's "corona". The intensity of the radiated light is much like a neon sign.
* As we approach still closer to the Sun, the spherical boundary gets to be only slightly larger than the Sun itself; the current density becomes extremely large; we enter the arc region of the discharge. This is the anode tuft. This is the photosphere. The intensity of the radiated light is much like an arc welding machine or continuous lightning. A high intensity ultraviolet light is emitted.
Backstreaming Electrons Associated With Solar Electron Bursts - American Geophysical Union, Fall Meeting 2007. Publication Date: 12/2007.
Quote:
Solar electron bursts are frequently observed in the ACE/SWEPAM suprathermal electron measurements at energies below 1.4 keV. A significant fraction of such events show backscattered electrons, beginning after the burst onset and traveling back towards the Sun along the magnetic field direction. Such backscattered particles imply a scattering mechanism beyond the spacecraft location. Some bursts also show backstreaming conic distributions, implying mirroring at magnetic field enhancements beyond the spacecraft. Here we present a study of these backstreaming particles during solar electron events.
Originally posted by buddhasystem
Zeuzz, it's about the third thread on the "electric cosmology", "plasma universe" and other such topics that you publish in recent memory. I wonder what your motivations are in proliferating same material.
The "electric star" model does not contain any math to speak of. As such, it's free of internal contraints test or any other real test, because such, you see, always happen in quantitative realm, that is in real science.
Until you can calculate neutrino yields within the "electric star" model, you have no moral right to claim that it is somehow superior to the "standard model". Same applies to most of your bullet points.
Originally posted by ZeuZZ
Buddha, i am getting tired of your relentless pseudoskeptisism of this concept.
If you actually have any valid reasons to dismiss it (so far i have heard none from you) please post them, otherwise you words are nothing more than hot air.
Originally posted by Nohup
It's always somewhat interesting to run across one of these obsessional theories that somebody cooks up. The proponent(s) continue to ring the bell, hoping I suppose for some kind of recognition of their genius, but generally only annoying the hell out of people.
You be sure to let us know when you win the Nobel Prize.
Originally posted by buddhasystem
The "electric star" model does not contain any math to speak of. As such, it's free of internal contraints test or any other real test, because such, you see, always happen in quantitative realm, that is in real science.
Originally posted by buddhasystem
Until you can calculate neutrino yields within the "electric star" model, you have no moral right to claim that it is somehow superior to the "standard model". Same applies to most of your bullet points.
The fusion reaction hypothesized by the standard solar model to be occurring inside the Sun’s core must emit a flood of electron neutrinos. Although the total observed neutrino flux (of all types of neutrino) may approximate the required level for electron neutrinos, a sufficient flux of these crucial electron neutrinos can only be inferred if it is shown that they (e-neutrinos) can ‘oscillate’ into different types of neutrinos (types which were not measured). The announcement made by the Sudbury Neutrino Observatory (SNO) that “the SNO detector has the capability to determine whether solar neutrinos are changing their type en route to Earth” is false on its face. There is no way that measurements made at only one end (here on Earth) of a transmission channel (that stretches from the Sun’s center to Earth) can reveal changes that occur farther up the channel (say, within the Sun itself, or near Mercury or Venus).
Consider a freight train that runs from New York to Chicago. We live in Chicago and are only able to observe the train as it arrives in Chicago. It pulls in with 4 freight cars, 2 tank cars, and 1 flat car. How is it possible, no matter how sophisticated our method of observation, for us to make any conclusions whatever about whether freight cars, tank cars, or flat cars have been added to or subtracted from the train at, say, Cleveland? Moreover, how is it possible to say that freight cars have turned into tank cars or flat cars along the route somewhere? The results of another more recent neutrino experiment, Fermilab’s MiniBooNE experiment, can best be summarized by the lab’s own statement, “When the MiniBooNE collaboration opened the box and ‘unblinded’ its data less than three weeks ago, the telltale oscillation signature was absent.” It does not state that any kinds of neutrinos were seen to ‘oscillate’ into any different type. At this writing (April 2007), therefore, the ‘missing neutrino’ question still remains very open
(1) The solar neutrino problem,
(2) Structure of the solar interior (helioseismoloy),
(3) The solar magnetic field (dynamo, solar cycle, corona),
(4) Hydrodynamics of coronal loops, -
(5) MHD oscillations and waves (coronal seismology),
(6) The coronal heating problem,
(7) Self-organized criticality (from nanoflares to giant flares,
(8) Magnetic reconnection processes,
(9) Particle acceleration processes,
(10) Coronal mass ejections and coronal dimming
Originally posted by buddhasystem
reply to post by ZeuZZ
And, by the way, it would be more interesting to calculate the total current that is leaving the sun in the form of protons and incoming electrons.
Where do the electrons are coming from?
How can you explain one of the consequences of your "theory"which is the Sun must be continuously losing charge, hence running out of power?
I would also like a quantitative exposition of item (7), among others, in your list:
Originally posted by ZeuZZ
The sun is not losing charge, its charge stays relatively constant as the amount of positive ions and negative ion travelling into and out of it on average will be the same. The fact that it has a net charge does not mean it is building up or losing charge, it reaches a state of equilibrium when it is at a certain voltage.
Originally posted by buddhasystem
Originally posted by ZeuZZ
The sun is not losing charge, its charge stays relatively constant as the amount of positive ions and negative ion travelling into and out of it on average will be the same. The fact that it has a net charge does not mean it is building up or losing charge, it reaches a state of equilibrium when it is at a certain voltage.
Well, if it's not losing charge, than I don't see how the energy coming out of it can be of electrical nature. Charge a sphere, place it into a rarified plasma, and see what happens.
You can't have an equilibrium in which you have current flowing, without repleneshing the source.
Originally posted by Orwells Ghost
I'm no physicist so please forgive me if I'm way off base here. But according to the electrical theory would not the sun be recieving energy from extra-solar sources, i.e the galactic center? So the sun would not necessarily be the engine of the solar system, deriving it's own power from a fuel source, but a single component in a larger, galctic (mabye even beyond?) circuit.
Originally posted by Orwells Ghost
I'm no physicist so please forgive me if I'm way off base here. But according to the electrical theory would not the sun be recieving energy from extra-solar sources, i.e the galactic center? So the sun would not necessarily be the engine of the solar system, deriving it's own power from a fuel source, but a single component in a larger, galctic (mabye even beyond?) circuit.
Galaxy formation in the Plasma Universe is modeled as two adjacent interacting Birkeland filaments. The simulation produces a flat rotation curve (ie the galaxy appears to rotate as a solid disk), but no hypothetical invisible dark matter is needed, as required by the convention model of galaxy formation.
The simulations derive from the work of Winston H. Bostick who obtained similar results from interacting plasmoids.[1] [2]
In the early 1980s Anthony L. Peratt, a student of Alfvén's, used supercomputer facilities at Maxwell Laboratories and later at Los Alamos National Laboratory to simulate Alfvén and Fälthammar's concept of galaxies being formed by primordial clouds of plasma spinning in a magnetic filament.
Originally posted by koenw
I haven't read through all the replies posted here, so I don't know if this has been mentioned yet but coronal heating fits into the nuclear model now.
Alfvén waves are suspected to be at the origin of the heating, transporting vast amounts of energy to the sun's atmosphere.
The electromagnetic energy driven by convective flows can be transported along the magnetic field as Poynting flux of Alfve´n waves. However, Alfve´n waves are disinclined to dissipate in collisionless plasmas, and the main problem was to explain how this energy flux is deposited locally to heat particles in the solar corona [5]. During the past 50 years there have been many attempts to solve this outstanding problem in astrophysics, and there are more than 20 different models and mechanisms for coronal heating proposed in the literature; see reviews [6–8].