Common Envelope Wind Tunnel: Range of Applicability and Self-similarity in Realistic Stellar Envelopes
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Common envelope evolution, the key orbital tightening phase of the traditional formation channel for close binaries, is a multistage process that presents many challenges to the establishment of a fully descriptive, predictive theoretical framework. In an approach complementary to global 3D hydrodynamical modeling, we explore the range of applicability for a simplified drag formalism that incorporates the results of local hydrodynamic "wind tunnel" simulations into a semi-analytical framework in the treatment of the common envelope dynamical inspiral phase using a library of realistic giant branch stellar models across the low, intermediate, and high-mass regimes. In terms of a small number of key dimensionless parameters, we characterize a wide range of common envelope events, revealing the broad range of applicability of the drag formalism as well its self-similar nature across mass regimes and ages. Limitations arising from global binary properties and local structural quantities are discussed together with the opportunity for a general prescriptive application for this formalism.
Originalsprog | Engelsk |
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Artikelnummer | 77 |
Tidsskrift | Astrophysical Journal |
Vol/bind | 899 |
Udgave nummer | 1 |
Antal sider | 13 |
ISSN | 0004-637X |
DOI | |
Status | Udgivet - 14 aug. 2020 |
ID: 248185885