Water in the destroyed asteroid at GD 61?

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Water in the destroyed asteroid at GD 61?

Post by Lazarus on 4th January 2011, 6:55 pm

Possible Signs of Water and Differentiation in a Rocky Exoplanetary Body

Some interesting observations of the white dwarf GD 61. Perhaps an object analogous to Ceres or Vesta was destroyed by the star's tidal forces. Unusually high oxygen levels may indicate the presence of water in the object.
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Re: Water in the destroyed asteroid at GD 61?

Post by Lazarus on 12th October 2013, 5:53 am

Now with news release and pretty pictures.

SpaceRef: White Dwarf has Water-rich Planetary Building Blocks Around It

Some interesting statements in there...

"These water-rich building blocks, and the terrestrial planets they assemble, may in fact be common. A system cannot create things as big as asteroids and avoid building planets, and GD 61 had the ingredients to deliver lots of water to their surfaces," according to Jay Farihi of the University of Cambridge, United Kingdom.
(emphasis mine)
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Re: Water in the destroyed asteroid at GD 61?

Post by Sirius_Alpha on 12th October 2013, 6:00 am

That's quite a statement...
I wonder how he figures that...

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Re: Water in the destroyed asteroid at GD 61?

Post by Lazarus on 15th October 2013, 2:30 pm

The Science paper is available on arXiv.

Farihi, Gänsicke and Koester: "Evidence for Water in the Rocky Debris of a Disrupted Extrasolar Minor Planet"
http://arxiv.org/abs/1310.3269
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Re: Water in the destroyed asteroid at GD 61?

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