Dead zones in Protoplanetary Disk and its effect on the Ice Line

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Dead zones in Protoplanetary Disk and its effect on the Ice Line

Post by Sirius_Alpha on 25th July 2012, 4:26 am

On the Evolution of the Snow Line in Protoplanetary Discs
http://arxiv.org/abs/1207.4284

Apparently taking into account turbulence "dead zones", you can get water-poor terrestrial planets to form. Regions of ice-rich planetesimals < 1 AU from the star can permit the formation of giant planets. I wonder if this provides a key to explaining some of the systems Kepler has been observing, with multiple low-density planets.

Nice astrobites article that breaks it down a bit
http://astrobites.com/2012/07/25/snow-lines-and-protoplanetary-disks-or-whered-all-the-water-go/

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Re: Dead zones in Protoplanetary Disk and its effect on the Ice Line

Post by PlutonianEmpire on 25th July 2012, 2:28 pm

Hmmm. Given this study, might it have been possible for Venus to have formed without any water at all?

Of course, more studies may be needed to either confirm or refute.

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Re: Dead zones in Protoplanetary Disk and its effect on the Ice Line

Post by Lazarus on 25th July 2012, 2:56 pm

So it may be possible to have terrestrial type planets forming outside volatile-rich, Neptune-like ones. I wonder what's in the gap between planets f and d in the 55 Cancri A system...
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Re: Dead zones in Protoplanetary Disk and its effect on the Ice Line

Post by Sirius_Alpha on 25th July 2012, 3:07 pm

It just dawned on me that this might have implications for explaining Kepler-20's architecture as well. Do you think that is feasible?

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Re: Dead zones in Protoplanetary Disk and its effect on the Ice Line

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