Elliptical instability in terrestrial planets and moons
نویسندگان
چکیده
منابع مشابه
Elliptical instability in terrestrial planets and moons
Context. The presence of celestial companions means that any planet may be subject to three kinds of harmonic mechanical forcing: tides, precession/nutation, and libration. These forcings can generate flows in internal fluid layers, such as fluid cores and subsurface oceans, whose dynamics then significantly differ from solid body rotation. In particular, tides in non-synchronized bodies and li...
متن کاملNo Pseudosynchronous Rotation for Terrestrial Planets and Moons
We re-examine the popular belief that a telluric planet or a satellite on an eccentric orbit can, outside a spin–orbit resonance, be captured in a quasi-static tidal equilibrium called pseudosynchronous rotation. The existence of such configurations was deduced from oversimplified tidal models assuming either a constant tidal torque or a torque linear in the tidal frequency. A more accurate tre...
متن کاملElliptical Craters and Basins on the Terrestrial Planets 1 2
The four largest well-preserved impact basins in the solar system, Borealis, Hellas 16 and Utopia on Mars, and South Pole-Aitken on the Moon, are all significantly elongated, with 17 aspect ratios >1.2. This population stands in contrast to experimental studies of impact cratering 18 that predict <1% of craters should be elliptical, and the observation that ~5% of the small crater 19 population...
متن کاملElliptical craters and basins on the terrestrial planets
The four largest well-preserved impact basins in the solar system, Borealis, Hellas, and Utopia on Mars, and South Pole–Aitken on the Moon, are all signifi cantly elongated, with aspect ratios >1.2. This population stands in contrast to experimental studies of impact cratering that predict <1% of craters should be elliptical, and the observation that ~5% of the small crater population on the te...
متن کاملStanton J. Peale: Deciphering the motions of planets and moons.
Planetary science lost one of its most highly respected members with the recent passing of Prof. Stanton (Stan) Peale. At last December’s American Geophysical Union meeting, Stan presented a talk on effects of the ellipsoidal shape of Mercury’s solid inner core on the tilt of the planet’s spin axis, but he was not feeling well. He was later diagnosed with a rare form of leukemia that proved res...
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: Astronomy & Astrophysics
سال: 2012
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361/201117741