Enceladus Jet Sources |
Enceladus Jet Sources |
Oct 10 2007, 05:20 PM
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Senior Member Group: Members Posts: 3648 Joined: 1-October 05 From: Croatia Member No.: 523 |
New press release by the imaging team:
Cassini Pinpoints Hot Sources of Jets on Enceladus October 10, 2007 (Source: Space Science Institute) CICLOPS link to the release here. One thing I was curious about tiger stripe naming - why didn't they switch "Baghdad" and "Cairo" so we have a nice A,B,C,D progression? I can only imagine it was done on purpose, but why? -------------------- |
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Dec 19 2007, 12:44 AM
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Member Group: Members Posts: 813 Joined: 29-December 05 From: NE Oh, USA Member No.: 627 |
Dfortes... Clathrate Faithful? (Although Frigid Faithful also depends on clathrates, I believe)
Very interesting, sir. I have to assume you are the autthor of this paper? The paper mentions hydrothermal processing ..... as these xenoliths migrate upwards, would they drag "salts" up with them as well? As much as I want that ocean to be there, the sodium issue makes me pause. What is really going on here, and what is the plume source? And what powers it? Craig |
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Dec 19 2007, 07:17 AM
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Junior Member Group: Members Posts: 41 Joined: 11-April 07 From: London, U.K. Member No.: 1957 |
Dfortes... Clathrate Faithful? (Although Frigid Faithful also depends on clathrates, I believe) Very interesting, sir. I have to assume you are the autthor of this paper? The paper mentions hydrothermal processing ..... as these xenoliths migrate upwards, would they drag "salts" up with them as well? As much as I want that ocean to be there, the sodium issue makes me pause. What is really going on here, and what is the plume source? And what powers it? Craig Thanks, yeah it's mine. I originally (in a moment of wholly uncharacteristic cynicism) called it tepid faithful. Settled on frothy faithful in the end. The difference with the existing clathrate model is that dissociation occurs in warm rising cryomagma whereas the Kieffer model is entirely dry. As for the sodium - it is not obvious to me that this rules out the presence of an ocean. I would expect any salts to be carried in aqueous solution and be partitioned into hydrated crystalline phase on eruption, so you would not see the expected spectral signature. In the near IR these hydrated salts will appear similar to ice. Whether or not these salts would become coloured after radiation processing I do not know. Sputtering might yield a small flux of cations - depends on the salt; might be Na, Mg, NH4 etc... Dom |
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