Characterising WASP-43b’s interior structure: Unveiling tidal decay and apsidal motion

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Volume 694 (February 2025)

A&A, 694 (2025) A233

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Table 5

Contributions to the periastron precession rate.

k_2,p	0.01	1.5
${\dot{ω}}_{G R}$ ${\dot \omega _{GR}}$	2.22″ d⁻¹	2.22″ d⁻¹
${\dot{ω}}_{t i d, ⋆}$ ${\dot \omega _{tid, \star }}$	0.23″ d⁻¹	0.23″ d⁻¹
${\dot{ω}}_{r o t, ⋆}$ ${\dot \omega _{rot, \star }}$	0.02″ d⁻¹	0.02″ d⁻¹
${\dot{ω}}_{t i d, p}$ ${\dot \omega _{tid,p}}$ ⁻	0.90″ d⁻¹	134.28″ d⁻¹
${\dot{ω}}_{r o t, p}$ ${\dot \omega _{rot,p}}$	0.06″ d⁻¹	8.98″ d⁻¹
Total $\dot{ω}$ $\dot \omega$	3.42″ d^{− 1}	145.72″ d⁻¹
Period	1037.4 yr	24.35 yr

Measured $\dot{ω}$ $\dot \omega$	(602.98±29.79)″ d⁻¹

Notes. Expected gravitational, rotational, and tidal contribution to the periastron precession in the extreme Love number cases (mass-point and homogeneous planet) and the corresponding apsidal motion period, assuming synchronous rotation for the planet. The value of $\dot{ω}$ $\dot \omega$ measured in this section is reported for comparison.

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