DAY 4
Lecture Notes
Day 4 Intro Slides
Reminder of what we have done/some intro to what we are doing today.
Code/Adventures
Choose Your Own Adventure #1
Make a fake planetary system in 3D! With some hints about stability.
Python code for solving for a multiplanet system IN THE THIRD DIMENSION.
Questions: (1) Once you have a stable system, how easy is it to disrupt? (2) What sorts of properties of the disrupting body effect how efficient the disruption is?
Choose Your Own Adventure #2
Make a planetary system based on Kepler data AND THEN DESTROY IT!
Read in some Kepler data from a confirmed planet system and plot its orbits. Also, throw something at it from the z-axis. See if you can distrupt it.
Questions: (1) What sorts of properties of the disrupting body effect how efficient the disruption is? (2) Can you disrupt this system with more than 1 body? How do the parameters of each body effect the disruption?
Choose Your Own Adventure #3
A Shorty Adventure: Plot Solar System Orbits with Rebound
Install the python N-body package "Rebound" and play with the Solar System examples.
Questions: (1) What do the different integrators do? (2) How many extra bodies can you add to your calculation before it slows down too much? How did this compare to the Hermite solver? Why do you think this is?
Choose Your Own Adventure #4
Simulate Merging Galaxies with Rebound
Do calculations and plots with the python N-body solver "Rebound" following the merger of two galaxies.
Questions: (1) How different does the final galaxy look depending on how many particles you use? (2) How does the dynamics change with different integrators?
Resources
Indepth Discussion of Several Integrators
Goes over some pros/cons of different sorts of integrators. Hermite integrators are discussed in section 2.3.2.
Super Planet Crash!
Can you make a stable system?
Bonus: Orbits Game
Can you please your alien overlords by building them awesome planetary systems?
A bit about stability of planetary systems
The intro and its equations are the specific points about stability in this paper.
A bit more about stability of planetary systems
Figure 1 is just pretty cool in general, and Figure 2 shows the distribution of spacing between planets.
Even more about stability of planetary systems
A BUNCH of figures looking at how different parameters of the system effect the stability.