Carbon-to-oxygen ratios of white dwarf planetesimals

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Carbon-to-oxygen ratios of white dwarf planetesimals

Post by Lazarus on 13th April 2016, 5:10 pm

Still no evidence for the existence of carbon planets...

Wilson et al. "Carbon to oxygen ratios in extrasolar planetesimals"
http://arxiv.org/abs/1604.03104

The range of C/O of the planetesimals is consistent with that found in the Solar System, and appears to follow a bimodal distribution: a group similar to the CI chondrites, with log(<C/O>)=-0.92, and oxygen-rich objects with C/O less than or equal to that of the bulk Earth. The latter group may have a higher mass fraction of water than the Earth, increasing their relative oxygen abundance.
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Re: Carbon-to-oxygen ratios of white dwarf planetesimals

Post by tommi59 on 14th April 2016, 4:15 am

55 Cancri e we can not count for example? Question
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Re: Carbon-to-oxygen ratios of white dwarf planetesimals

Post by Lazarus on 14th April 2016, 4:33 pm

God only knows what's going on with 55 Cnc e. It seems that every subsequent result adds something to contradict the previous one, I really don't yet feel there is a consistent picture of what the planet is like that takes into account all the various lines of evidence.
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Re: Carbon-to-oxygen ratios of white dwarf planetesimals

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