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- W4220794809 abstract "Abstract Observations of protoplanetary disks have revealed them to be complex and dynamic, with vertical and radial transport of gas and dust occurring simultaneously with chemistry and planet formation. Previous models of protoplanetary disks focused primarily on chemical evolution of gas and dust in a static disk, or dynamical evolution of solids in a chemically passive disk. In this paper, we present a new 1D method for modeling pebble growth and chemistry simultaneously. Gas and small dust particles are allowed to diffuse vertically, connecting chemistry at all elevations of the disk. Pebbles are assumed to form from the dust present around the midplane, inheriting the composition of ices at this location. We present the results of this model after 1 Myr of disk evolution around a 1 M ⊙ star at various locations both inside and outside the CO snowline. We find that for a turbulent disk ( α = 10 −3 ), CO is depleted from the surface layers of the disk by roughly 1–2 orders of magnitude, consistent with observations of protoplanetary disks. This is achieved by a combination of ice sequestration and decreasing UV opacity, both driven by pebble growth. Further, we find the selective removal of ice species via pebble growth and sequestration can increase gas phase C/O ratios to values of approximately unity. However, our model is unable to produce C/O values of ∼1.5–2.0 inferred from protoplanetary disk observations, implying selective sequestration of ice is not sufficient to explain C/O ratios >1." @default.
- W4220794809 created "2022-04-03" @default.
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- W4220794809 date "2022-03-01" @default.
- W4220794809 modified "2023-10-09" @default.
- W4220794809 title "Chemical Feedback of Pebble Growth: Impacts on CO depletion and C/O ratios" @default.
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- W4220794809 doi "https://doi.org/10.3847/1538-4357/ac511b" @default.
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