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4:45 AM
OT: Anybody care to enlighten me on what 'ionized convecting molten ice mantle' means? Apparently it is responsible for the magnetic field exhibited by the ice giants
 
@Everyone a mouthful term for metallic hydrogen?
Metallic hydrogen is a phase of hydrogen in which it behaves as an electrical conductor. This phase was predicted theoretically in 1935, but has not been reliably produced in laboratory experiments due to the requirement of high pressures, on the order of hundreds of gigapascals. At these pressures, hydrogen might exist as a liquid rather than solid. Liquid metallic hydrogen is thought to be present in large amounts in the gravitationally compressed interiors of Jupiter, Saturn, and in some of the newly discovered extrasolar planets. History Theoretical predictions Metallization of hyd...
 
Yep
Said article states the IG may not have metallic H down there
 
@Everyone why not?
 
Anyway, what I would imagine by "ionized convecting molten ice mantle" would be some precipitation process
 
4:59 AM
Down in the core??
 
no, in the mantle
ice to liquid precipitates that for some reason ionize in the process
 
atm. pressure perhaps... but ionized enough to generate a field that vast?
 
I can't really imagine it now, too sleepy ... I'm having hard time thinking of molecules of something that would ionize through change in density
 
high pressure -> heat equivalent
 
unless you also cool it down to near absolute zero so it becomes BEC
 
5:03 AM
Anyway (+: I'm keeping you awake
 
but we're talking of mantle here, not cores
BEC = Bose - Einstein Condensate
 
Yep.. it feels unusual. Plus the IG exhibit highly inclined field
They say it's because of the source
 
dunno, inclination reads to me as "can't be connected to processes in the mantle" then
 
Unusual (+: Eccentric
 
well if you have this transitional state of some ice to liquid in the mantle, my (current) logic suggests you'd see that uniformly all around it, not inclined at some plane ... but as you compress the source towards the core into a smaller area, inclination of the field is more likely (i.e. mag. reconnection point is smaller)
 
5:12 AM
I'm out of my depth but what you say sounds reasonable
 
BTW that's not off-topic on the site, we had similar questions before.
falls within planetary science
 
I'll poke you for it when you're awake (+:
Rather tenuous a link
 
IMO hydrogen is most likely candidate, but that's just my opinion on something that's far from being a settled matter. Ask on the site, just make sure it's not speculative.
 
Coming from me, it would be speculative. All I have is a vapour of nuance
Go to bed (+: We'll talk alter
 
;) night
 
5:24 AM
(+:
 
 
10 hours later…
3:31 PM
posted on July 15, 2014

This colorized image of Jupiter's moon Europa is a product of clear-filter grayscale data from one orbit of NASA's Galileo spacecraft, combined with lower-resolution color data taken on a different orbit. The blue-white terrains indicate relatively pure water ice, whereas the reddish areas contain water ice mixed with hydrated salts, potentially magnesium sulfate or sulfuric acid. The reddish m

 
 
5 hours later…
8:36 PM
Some of you might find this interesting:
> This summer, Brian Greene, Professor of Physics and Mathematics at Columbia University, leads a free guided summer session focused on Einstein’s Special Relativity. The course is a six-week version of our math-based University offering — enhanced by new features that will ensure you’re not going at it alone. Professor Greene will be hosting an online session every week to walk you through some of the trickier material and answer your questions directly.
 

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