Astro & cosmo-chemical consequences of accretion bursts I: the D/H ratio of water

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James E. Owen, Emmanuel Jacquet

(Submitted on 24 Oct 2014), accepted for publication in MNRAS

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 We find that the accretion bursts result in a significantly lower (D/H) water ratio and a more extended region (radius up to ∼ 1 − 3 AU) where water is equilibrated with hydrogen gas (D/H=2 × 10−5 ), when compared to burst-free
models. Solar system constraints suggest that our solar nebula either experienced no accretion bursts and had a Schmidt number . 0.2 or had a Schmidt number closer to “nominal” values (∼ 1) and experienced several accretion bursts.

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