The Equilibrium Tide: An Updated Prescription for Population Synthesis Codes. (arXiv:2206.06068v2 [astro-ph.SR] UPDATED)
<a href="http://arxiv.org/find/astro-ph/1/au:+Preece_H/0/1/0/all/0/1">Holly P. Preece</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Hamers_A/0/1/0/all/0/1">Adrian S. Hamers</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Neunteufel_P/0/1/0/all/0/1">Patrick G. Neunteufel</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Schafer_A/0/1/0/all/0/1">Adam L. Schafer</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Tout_C/0/1/0/all/0/1">Christopher A. Tout</a>
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.
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.
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