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Drain away the earth's oceans and a global pattern of great ridges appears. Adjacent to these continental and undersea mountain ranges are layers of silt and clay, so thick that they fill the gaps between ridges, creating extensive…

综合物理 · 物理学 2010-04-16 Milton Zysman , Frank Wallace

Erosion, entrainment and deposition are complex and dominant, but yet poorly understood, mechanical processes in geophysical mass flows. Here, we propose a novel, process-based, two-phase, erosion-deposition model capable of adequately…

流体动力学 · 物理学 2022-06-17 Shiva P. Pudasaini , Jan-Thomas Fischer

A giant impact is commonly thought to explain the dramatic contrast in elevation and crustal thickness between the two hemispheres of Mars known as the "Martian Dichotomy". Initially, this scenario referred to an impact in the northern…

地球与行星天体物理 · 物理学 2022-12-08 Harry A. Ballantyne , Martin Jutzi , Gregor J. Golabek , Lokesh Mishra , Kar Wai Cheng , Antoine B. Rozel , Paul Tackley

The tidal perturbation of embedded protoplanets on their natal disks has been widely attributed to be the cause of gap-ring structures in sub-mm images of protoplanetary disks around T Tauri stars. Numerical simulations of this process have…

地球与行星天体物理 · 物理学 2021-12-08 Yi-Xian Chen , Zhuoxiao Wang , Ya-Ping Li , Clément Baruteau , Douglas N. C. Lin

Recent observations of several protoplanetary discs have found evidence of departures from flat, circular motion in the inner regions of the disc. One possible explanation for these observations is a disc warp, which could be induced by a…

地球与行星天体物理 · 物理学 2018-08-29 Rebecca Nealon , Giovanni Dipierro , Richard Alexander , Rebecca Martin , Chris Nixon

Many triple-star systems have an inner pair with an orbital period of a few days only. A common mechanism to explain the short-period pile-up present in the observations is the migration through Lidov-Kozai cycles combined with tidal…

地球与行星天体物理 · 物理学 2018-08-01 Manon Bataille , Anne-Sophie Libert , Alexandre C. M. Correia

To explain Venus' young surface age and lack of plate tectonics, Venus' tectonic regime has often been proposed to be either an episodic-lid regime with global lithospheric overturns, or an equilibrium resurfacing regime with numerous…

地球与行星天体物理 · 物理学 2023-04-19 Jiacheng Tian , Paul J. Tackley , Diogo L. Lourenço

White dwarf (WD) pollution is thought to arise from the tidal disruption of planetary bodies. The initial fragment stream is extremely eccentric, while observational evidence suggest that discs are circular or nearly so. Here we propose a…

地球与行星天体物理 · 物理学 2021-01-19 Uri Malamud , Evgeni Grishin , Marc Brouwers

We present the new results of the two-dimensional numerical experiments on the cross-sectional evolution of a twisted magnetic flux tube rising from the deeper solar convection zone (-20,000 km) to the corona through the surface. The…

太阳与恒星天体物理 · 物理学 2015-05-28 Shin Toriumi , Takaaki Yokoyama

The radius valley (or gap) in the observed distribution of exoplanet radii, which separates smaller super-Earths from larger sub-Neptunes, is a key feature that theoretical models must explain. Conventionally, it is interpreted as the…

地球与行星天体物理 · 物理学 2024-01-10 Remo Burn , Christoph Mordasini , Lokesh Mishra , Jonas Haldemann , Julia Venturini , Alexandre Emsenhuber , Thomas Henning

Several white dwarfs with atmospheric metal pollution have been found to host small planetary bodies (planetesimals) orbiting near the tidal disruption radius. We study the physical properties and dynamical origin of these bodies under the…

地球与行星天体物理 · 物理学 2020-10-09 Christopher E. O'Connor , Dong Lai

The Padul Fault is located in the Central Betic Cordillera, formed in the framework of the NW-SE Eurasian-African plate convergence. In the Internal Zone, large E-W to NE-SW folds of western Sierra Nevada accommodated the greatest NW-SE…

Thermal, orbital, and rotational dynamics of tidally loaded exoplanets are interconnected by intricate feedback. The rheological structure of the planet determines its susceptibility to tidal deformation and, as a consequence, participates…

地球与行星天体物理 · 物理学 2020-09-02 Michaela Walterová , Marie Běhounková

Traditionally, the deformation of continuum is divided into elastic, plastic, and flow. For a large deformation with cracking, they are combined together. So, for complicated deformation, a formulation to express the evolution of…

经典物理 · 物理学 2007-05-23 Jianhua Xiao

We discover a remarkable correlation between the inter-tremor time interval and the slenderness ratio of the overriding plate in subduction zones all over the world. In order to understand this phenomenon better, we perform numerical…

地球物理 · 物理学 2020-10-05 Jyoti Behura , Shayan Mehrani , Farnoush Forghani

Accordling to the theory of Kozai resonance, the initial mutual inclination between a small body and a massive planet in an outer circular orbit is as high as $\sim39.2^{\circ}$ for pumping the eccentricity of the inner small body. Here we…

地球与行星天体物理 · 物理学 2015-06-15 Yuan-Yuan Chen , Hui-Gen Liu , Gang Zhao , Ji-Lin Zhou

We extend our previous work on the evolution of close binary systems with misaligned orbital and spin angular momenta resulting from non-dissipative tidal interaction to include all physical effects contributing to apsidal motion. In…

太阳与恒星天体物理 · 物理学 2023-09-13 P. B. Ivanov , J. C. B. Papaloizou

North Pacific subsurface temperature data from the Simple Ocean Data Assimilation model at 10m, 50m, 75m, 100m and 150m depths, are analyzed using a combination of state-space decomposition and subspace identification techniques to examine…

应用统计 · 统计学 2012-04-12 Cindy Bessey , Roy Mendelssohn

We investigate the dynamical evolution of particles in the $\beta$ Pic system to determine likely formation pathways to the present-day observed exocomet populations. We aim to relate these results to similar studies recently carried out…

地球与行星天体物理 · 物理学 2026-03-09 K. P. Jaworska , H. J. Hoeijmakers

We explore the origin and orbital evolution of the Kuiper belt in the framework of a recent model of the dynamical evolution of the giant planets, sometimes known as the Nice model. This model is characterized by a short, but violent,…