Tidal Evolution of the Earth–Moon System with a High Initial Obliquity
نویسندگان
چکیده
Abstract A giant-impact origin for the Moon is generally accepted, but many aspects of lunar formation remain poorly understood and debated. Ćuk et al. proposed that an impact left Earth–Moon system with high obliquity angular momentum could explain Moon’s orbital inclination isotopic similarity to Earth. In this scenario, instability during Laplace Plane transition, when orbit transitions from gravitational influence Earth’s figure Sun, would both lower system’s its present-day value generate inclination. Recently, Tian & Wisdom discovered new dynamical constraints on transition concluded not have evolved initial state obliquity. Here we demonstrate initially can evolve into present state, identify a spin–orbit secular resonance as key mechanism in later stages transition. Some simulations by did encounter late resonance, their model suppressed tides resulting damping. Our results giant Earth ( θ > 61°) promising scenario explaining properties system, including obliquity, geochemistry Moon,
منابع مشابه
a study on construction of iranian life tables: the case study of modified brass logit system
چکیده ندارد.
15 صفحه اولTidal dissipation at arbitrary eccentricity and obliquity
Expressions for tidal dissipation in a body in synchronous rotation at arbitrary orbital eccentricity and obliquity are derived. The rate of tidal dissipation for a synchronously rotating body is compared to that in a body in asymptotic nonsynchronous rotation. © 2007 Elsevier Inc. All rights reserved.
متن کاملA high stellar obliquity in the WASP-7 exoplanetary system
We measure a tilt of 86± 6◦ between the sky projections of the rotation axis of the WASP-7 star, and the orbital axis of its close-in giant planet. This measurement is based on observations of the Rossiter-McLaughlin (RM) effect with the Planet Finder Spectrograph on the Magellan II telescope. The result conforms with the previously noted pattern among hot-Jupiter hosts, namely, that the hosts ...
متن کاملEvolution of Mercury’s obliquity
Mercury has a near-zero obliquity, i.e. its spin axis is nearly perpendicular to its orbital plane. The value of the obliquity must be known precisely in order to constrain the size of the planet’s core within the framework suggested by Peale [Peale, S.J., 1976. Nature 262, 765–766]. Rambaux and Bois [Rambaux, N., Bois, E., 2004. Astron. Astrophys. 413, 381–393] have suggested that Mercury’s ob...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: The planetary science journal
سال: 2021
ISSN: ['2632-3338']
DOI: https://doi.org/10.3847/psj/ac12d1