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Ceres Geology
ngunn
post Mar 17 2016, 12:06 PM
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From Science Daily website:
https://www.sciencedaily.com/releases/2016/...60316082727.htm
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TheAnt
post Dec 17 2016, 02:47 PM
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Polar ice found on Ceres, if this ice is trapped there after outgassing of Ceres itself is not clearly stated on this page from Max Planck institute, though I have a hunch it might be the case.
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antipode
post Jan 23 2017, 02:57 AM
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Haze at Occator crater
on dwarf planet Ceres

https://arxiv.org/ftp/arxiv/papers/1701/1701.05812.pdf

p
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Stefan
post Jan 31 2017, 04:33 PM
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I examined the original haze claim and found it to be complete nonsense:

https://arxiv.org/abs/1701.08550
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ngunn
post Feb 1 2017, 10:37 AM
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Thanks for posting that here. Figure 15 on page 40 of the PDF version you linked to gives the clearest picture I've seen of the central white spot in Occator crater. (For anyone tempted to stop at the abstract or just skim the less technical parts of the conclusions I would say: don't miss the illustrations in that paper!)
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Habukaz
post Mar 7 2017, 09:57 PM
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Some Dawn scientists think that the dome in the centre of Occator is a cryovolcanic feature about 4 million years old (Occator itself is stated as being 34 million years old), and that at this point, it cannot be ruled out that cryovolcanic activity is still present at a lower level. The haze interpretation is also doubled down on, and it is mentioned that it could be possible evidence for ongoing activity.

QUOTE
"The age and appearance of the material surrounding the bright dome indicate that Cerealia Facula was formed by a recurring, eruptive process, which also hurled material into more outward regions of the central pit”, says Nathues. "A single eruptive event is rather unlikely," he adds. A look into the Jupiter system supports this theory. The moons Callisto and Ganymede show similar domes. Researchers interpret them as volcanic deposits and thus as signs of cryovolcanism.

The MPS scientists assume that a similar process is active on Ceres. "The large impact that tore the giant Occator crater into the surface of the dwarf planet must have originally started everything and triggered the later cryovolcanic activity," says Nathues. Following the disruption of the impact, the brine researchers suspect either as a complete layer or as scattered patches under the rocky mantel was able to move closer to the surface. The lower pressure allowed water and dissolved gases, such as methane and carbon dioxide, to escape forming a system of vents. At the surface, fractures appeared through which the saturated solution erupted from the depth. The deposited salts gradually formed the present dome.


http://www.mps.mpg.de/Cryovolcanism-on-Dwarf-Planet-Ceres


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TheAnt
post Mar 8 2017, 01:11 AM
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By studying the domes and bright areas at Occator scientists at Max Planck Institute, Institut für Endlagerforschung & University of Winnipeg have found signs hinting of an subsurface ocean or reservoir containing brine water with dissolved CO2 and methane.
Evolution of Occator crater on Ceres.

Edit: This is the actual paper, I did only see Danieles post above but when double check on my post now noted that Habukaz have posted the pressrelease.
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marsbug
post Mar 10 2017, 02:46 AM
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QUOTE (Habukaz @ Mar 7 2017, 09:57 PM) *
Some Dawn scientists think that the dome in the centre of Occator is a cryovolcanic feature about 4 million years old (Occator itself is stated as being 34 million years old), and that at this point, it cannot be ruled out that cryovolcanic activity is still present at a lower level. The haze interpretation is also doubled down on, and it is mentioned that it could be possibly be evidence for ongoing activity.



http://www.mps.mpg.de/Cryovolcanism-on-Dwarf-Planet-Ceres


4 million years is geologically recent, but would it be recent nough to imply suburface cryolava present today?


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Daniele_bianchin...
post Mar 10 2017, 12:31 PM
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QUOTE (TheAnt @ Mar 8 2017, 02:11 AM) *
By studying the domes and bright areas at Occator scientists at Max Planck Institute, Institut für Endlagerforschung & University of Winnipeg have found signs hinting of an subsurface ocean or reservoir containing brine water with dissolved CO2 and methane.
Evolution of Occator crater on Ceres.

Edit: This is the actual paper, I did only see Danieles post above but when double check on my post now noted that Habukaz have posted the pressrelease.


Glad to see that my hypothesis of June 5, 2015 was the same or like to recent work :-)
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TheAnt
post Apr 8 2017, 01:18 PM
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Transient exosphere found at Ceres.
And the solar wind turned out to be the explanation for it being there at times and then not.
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