Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Iceline Variations Driven by Protoplanetary Disc Gaps   The composition of forming planets is strongly affected by the protoplanetary
disc's thermal structure. This thermal structure is predominantly set by dust
radiative transfer and viscous (accretional) heating and can be impacted by
gaps - regions of low dust and gas density that can occur when planets form.
The effect of variations in dust surface density on disc temperature has been
poorly understood until now. In this work, we use the radiative transfer code
MCMax to model the 2D dust thermal structure with individual gaps corresponding
to planets with masses of 0.1 M$_J$ - 5 M$_J$ and orbital radii of 3, 5, and 10
AU. Low dust opacity in the gap allows radiation to penetrate deeper into the
disc and warm the midplane by up to 16 K, but only for gaps located in the
region of the disc where stellar irradiation is the dominant source of heat
(here, a$\gtrsim$4 AU). In viscously-heated regions (a$\lesssim$4 AU), the
midplane of the gap is relatively cooler by up to 100 K. Outside of the gap,
broad radial oscillations in heating and cooling are present due to changes in
disc flaring. These thermal features affect local segregation of volatile
elements (H$_2$O, CH$_4$, CO2, CO) between the dust and gas. We find that
icelines experience dramatic shifts relative to gapless models: up to 6.5 AU
towards the star and 4.3 AU towards the midplane. While quantitative
predictions of iceline deviations will require more sophisticated models which
include transport and sublimation/condensation kinetics, our results provide
evidence that planet-induced iceline variations represent a potential feedback
from the planet onto the composition of material it is accreting.

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The categories of this paper are: cmp-lg
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The categories of this paper are: hep-th
29
The categories of this paper are: funct-an
5
The categories of this paper are: gr-qc
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The categories of this paper are: mtrl-th
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The categories of this paper are: nucl-ex
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The categories of this paper are: atom-ph
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The categories of this paper are: comp-gas
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The categories of this paper are: cs
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The categories of this paper are: hep-ex
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The categories of this paper are: econ
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The categories of this paper are: q-bio
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The categories of this paper are: quant-ph
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The categories of this paper are: stat
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The categories of this paper are: alg-geom
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The categories of this paper are: eess