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Yousuke Itoh, Tidal Mechanism as an Impossible Cause of the Observed Secular Increase of the Astronomical Unit, Publications of the Astronomical Society of Japan, Volume 61, Issue 6, 25 December 2009, Pages 1373–1374, https://doi.org/10.1093/pasj/61.6.1373
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Abstract
Krasinsky and Brumberg (2004, Celest. Mech. Dyn. Astron., 90, 267) reported a secular increase in the Astronomical Unit (AU) of 15 meters per century. Recently, Miura et al. (2009, PASJ, 61, 1247) proposed that angular-momentum transfer from the rotation of the Sun to the orbital motion of the solar-system planets may explain the observed increase of the AU. They assumed that the tidal effect between the planets and the Sun is the cause of this transfer. Here, we claim that a tidal effect cannot be a cause of this type of transfer to explain the increase of the AU.