The Equilibrium Tide: An Updated Prescription for Population Synthesis Codes
Publication Date
2022-07-01Journal Title
Astrophysical Journal
ISSN
0004-637X
Publisher
American Astronomical Society
Volume
933
Issue
1
Language
en
Type
Article
This Version
VoR
Metadata
Show full item recordCitation
Preece, H., Hamers, A., Neunteufel, P., Schaefer, A., & Tout, C. (2022). The Equilibrium Tide: An Updated Prescription for Population Synthesis Codes. Astrophysical Journal, 933 (1) https://doi.org/10.3847/1538-4357/ac6fe3
Abstract
We present an updated prescription for the equilibrium tides suitable for
population synthesis codes. A grid of 1D evolutionary models was created and
the viscous time-scale was calculated for each detailed model. A metallicity
dependent power-law relation was fitted to both the convective cores and
convective envelopes of the models. The prescription was implemented into the
population synthesis code BSE and predicts an 16.5% reduction in the overall
number of merges, with those involving main-sequence stars most affected. The
new prescription also reduces the overall supernova rate by 3.6% with
individual channels being differently affected. The single degenerate Ia
supernova occurrence is reduced by 12.8%. The merging of two Carbon Oxygen
white dwarfs to cause a Ia supernova occurs 16% less frequently. The number of
sub-synchronously rotating stars in close binaries is substantially increased
with our prescription, as is the number of non-circularized systems at the
start of common-envelope evolution.
Keywords
340, Stars and Stellar Physics
Identifiers
apjac6fe3, ac6fe3, aas36690
External DOI: https://doi.org/10.3847/1538-4357/ac6fe3
This record's URL: https://www.repository.cam.ac.uk/handle/1810/338614
Rights
Licence:
http://creativecommons.org/licenses/by/4.0/
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