Views
3 years ago

The Birth of Giants – Bottom Up or Top Down?

The Birth of Giants – Bottom Up or Top Down?

Gravitational

Gravitational Instability Gravitational Instability (GI) Dispersion relation for density waves in disk Get and instability when Toomre Q parameter Objects with size and mass form, with roughly equal thermal, gravitational and rotational energy contributions. Collapse further if thermal and rotational support can be removed.

Gravitational Instability Mayer et al. 2002 TreeSPH, isothermal EOS, Pros: • allows planets to form quickly ( • explains potentially coreless extrasolar planets • explains distant planetary companions Cons: • does not naturally explain cores (and high-Z element enhancements) of Jupiter and Saturn yr) • does extremely poor job accounting for the cores of Neptune and Uranus • requires extremely massive protoplanetary disks : between 4 and 20 AU (typical observed disk masses are within 100 AU)

Top Down or Bottom up? - BaltCICA
Top Down + Bottom Up = Comprehensive Community Change
Bottom-up and top-down approaches in Computational Neuroscience
Top-down and Bottom-up Approaches to Nanoscale Fabrication
“Top-Down” “Middle-Out” “Bottom-Up” - mcisb
Harmonizing the Bottom-up TIMES and the Top-down GEMINI-E3 ...
Top-Down vs. Bottom Up: Working Towards Consensus ... - CASIOPA
Top-down versus bottom-up D´aithı Stone (stoned@csag ... - IMAGe
Perception • Why is perception important for cognition? • Top-down ...
Bottom-up and Top-down Perception • Bottom-up perception • Top ...
Blending Top-Down and Bottom-Up Approaches in Conceptual ...
Top-down - Bottom-up? - intrac
IV. Processes: Top-down and Bottom-up
A Comparative Study of Bottom-Up and Top-Down ... - Eurecom
Top-Down Versus Bottom-Up Control of Attention in
Bottom Up & Top Down Anchor - Pandrol USA
Dissociating Bottom-Up and Top-Down Processes in a Manual ...
Combining Top-Down and Bottom-Up Approaches To Energy ...
Multi-feature Bottom-up Processing and Top-down Selection for an ...
Investigation of neural correlates of bottom-up and top-down ...
Top-Down vs. Bottom Up - Fgamedia.org
Top-Down and Bottom-Up Approaches - CAADP
ILIAS at Vienna University: Bottom Up and Top Down
Top-down and bottom-up approach of malnutrition leads to a ...
Bottom-up or Top-down: Campbell's Rationalist Account of ...