Magnetohydrodynamic simulations of A-type stars: Long-term evolution of core dynamo cycles

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Volume 691 (November 2024)

A&A, 691 (2024) A326

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Table 2.

Differential rotation parameters and the maximum meridional flow ${\bar{U}}_{mer}^{\max}$ $\overline{U}_{\mathrm{mer}}^{\mathrm{max}}$ from all the simulations.

Run	Δ_Ω^(r)	$Δ_{Ω}^{(\bar{θ})} (60 °)$ $\Delta_\Omega^{(\overline{\theta})}(60\circ)$	$Δ_{Ω}^{(\bar{θ})} (75 °)$ $\Delta_\Omega^{(\overline{\theta})}(75\circ)$	Δ_Ω^CZ(r)	$Δ_{Ω}^{CZ (\bar{θ})} (60 °)$ $\Delta_\Omega^{\mathrm{CZ}(\overline{\theta})}(60\circ)$	$Δ_{Ω}^{CZ (\bar{θ})} (75 °)$ $\Delta_\Omega^{\mathrm{CZ}(\overline{\theta})}(75\circ)$	${\bar{U}}_{mer}^{\max} [m / s]$ $\overline{U}_{\mathrm{mer}}^{\mathrm{max}}~\mathrm{[m/s]}$
MHDr1	0.1579	−0.0001	−0.0011	0.3801	0.2650	0.4073	7.7
MHDr2	0.0505	−0.0001	−0.0006	0.1131	0.0699	0.1142	6.0
MHDr2*I	0.0405	−0.0001	−0.0007	0.0941	0.0607	0.0937	3.2
MHDr2*II	0.0538	−0.0000	−0.0006	0.1209	0.0734	0.1265	3.3
MHDr3	0.0251	−0.0000	−0.0004	0.0538	0.0295	0.0484	3.2
MHDr3*	0.0224	−0.0001	−0.0006	0.0489	0.0283	0.0438	2.1
MHDr4	0.0197	−0.0000	−0.0003	0.0405	0.0213	0.0350	2.5
MHDr4*	0.0169	−0.0001	−0.0006	0.0387	0.0208	0.0333	2.3

zMHDr1	–	–	–	0.3742	0.2442	0.3729	7.8
zMHDr2	–	–	–	0.1290	0.0739	0.1294	6.4
zMHDr3	–	–	–	0.0511	0.0282	0.0440	4.4
zMHDr4	–	–	–	0.0434	0.0214	0.0377	2.7

Notes. Run MHDr2* includes the parameters before (I) and after (II) the dynamo migration. The differential rotation parameters follow Eqs. (32) and (33).

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