The interiors of Uranus and Neptune: current understanding and open questions
نویسندگان
چکیده
منابع مشابه
Superionic to superionic phase change in water: consequences for the interiors of uranus and neptune.
Using density functional molecular dynamics free energy calculations, we show that the body centered cubic (bcc) phase of superionic ice previously believed to be the only phase is, in fact, thermodynamically unstable compared to a novel phase with oxygen positions in face centered cubic lattice sites. The novel phase has a lower proton mobility than the bcc phase and may exhibit a higher melti...
متن کاملClouds of Neptune and Uranus
We present results on the bases and concentrations of methane ice, ammonia ice, ammonium hydrosulfidesolid, water ice, and aqueous-ammonia solution (“droplet”) clouds of Neptune and Uranus, based on an equilibrium cloud condensation model. Due to their similar p-T structures, the model results for Neptune and Uranus are similar. Assuming 30–50× solar enhancement for the condensibles species, as...
متن کاملMID-INFRARED ETHANE EMISSION ON NEPTUNE AND URANUS Short Title: Ethane on Neptune and Uranus
We report 8to 13-μm spectral observations of Neptune and Uranus from the NASA Infrared Telescope Facility spanning more than a decade. The spectroscopic data indicate a steady increase in Neptune's mean atmospheric 12–μm ethane emission from 1985 to 2003, followed by a slight decrease in 2004. The simplest explanation for the intensity variation is an increase in stratospheric effective tempera...
متن کاملLimb polarization of Uranus and Neptune ⋆
Aims. We have detected a strong limb polarization for Uranus and Neptune. With spectropolarimetric observations we characterize the spectral dependence of this limb polarization and explore the diagnostic potential for investigating the distribution and properties of the scattering particles. Methods. We present disk resolved spectropolarimetry of Uranus and Neptune covering the wavelength rang...
متن کاملthe effects of cooperative versus individual directed reading thinking activities on students inferential and referential questions
two groups of students were assigned as experimental and control ones, and were given instruction on directed reading-thinking activities and after some treatment, they were post-tested. although the initial pre-test did not show any significant differences, the final post-test result revealed that the cooperative reading comprehension helped the experimental group. the cooperative students’...
15 صفحه اولذخیره 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: Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences
سال: 2020
ISSN: 1364-503X,1471-2962
DOI: 10.1098/rsta.2019.0474