Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Accretion in Common Envelope Evolution   Common envelope evolution (CEE) occurs in some binary systems involving
asymptotic giant branch (AGB) or red giant branch (RGB) stars, and
understanding this process is crucial for understanding the origins of various
transient phenomena. CEE has been shown to be highly asymmetrical and global 3D
simulations are needed to help understand the dynamics. We perform and analyze
hydrodynamic CEE simulations with the adaptive mesh refinement (AMR) code
AstroBEAR, and focus on the role of accretion onto the companion star. We
bracket the range of accretion rates by comparing a model that removes mass and
pressure using a subgrid accretion prescription with one that does not.
Provided a pressure-release valve, such as a bipolar jet, is available,
super-Eddington accretion could be common. Finally, we summarize new results
pertaining to the energy budget, and discuss the overall implications relating
to the feasibility of unbinding the envelope in CEE simulations.

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The categories of this paper are: patt-sol
32
The categories of this paper are: atom-ph
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The categories of this paper are: funct-an
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The categories of this paper are: quant-ph
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The categories of this paper are: hep-ex
5
The categories of this paper are: gr-qc
19
The categories of this paper are: eess
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The categories of this paper are: q-fin
33
The categories of this paper are: plasm-ph
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The categories of this paper are: dg-ga
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The categories of this paper are: q-bio
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The categories of this paper are: hep-lat
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The categories of this paper are: hep-th
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The categories of this paper are: nucl-th
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The categories of this paper are: comp-gas
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The categories of this paper are: math