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Planetary Nebula Library: Hydro Runs

Reason for Library

Here we explore a variety possible parameters and environments that can shape planetary nebulae, presented in various forms. This library will record a number of combinations of different density backgrounds and types of flows and also any parameter changes within those different combinations. The environments and flow structures are listed below. Environments:

• Constant Ambient: The surrounding density is initially constant.
• Stratified Ambient: The surrounding density falls off as 1/r².
• Toroidal Ambient: The surrounding density decays from the equator to the pole as defined in ​Frank & Mellema, 1994 Apj by the variables \alpha_{t} and \beta_{t}.
  • \alpha_{t} describes the contrast in density of the torus from the pole to the equator.
  • \beta_{t} describes how elliptical or spherical the torus is. Small values coincide with a more elliptical torus while values closer to 1 indicate a more spherical torus.

Flow Structures:

• Clump: A spherical cloud of gas.
• Jet: A constant stream of gas.
• Diverging Wind: A constant stream of gas that sweeps an arc in the surrounding medium.

The tables below will be updated periodically with movies of new runs and their parameters with the newest runs appearing first.

Please see ​Ruka's PN Page for more movies and additional information.

Update 9/09: The layout was changed today in order to make the page more readable. All of the density movies and images were updated to show the density in particles/cc. Thermal pressure images and movies are currently being updated.

Go ​here to find a list of changes that were made today.

Toroidal + Stratified Ambient

Jet

	Standard Run	Changes to Jet Parameters			Changes to Ambient Parameters
Date	8/27/2013	8/30/2013	9/02/2013	9/04/2013	9/05/2013	9/09/2013	9/09/2013
Jet Radius [AU]	500	500	500	500	500	500	500
Jet Density [particles/cm3]	40,000	40,000	40,000	40,000	40,000	40,000	40,000
Jet Velocity [km/s]	100	200	300	100	100	100	100
Jet Temperature [K]	10	10	10	10,000	10	10	10
Ambient Density [particles/cm3]	400	400	400	400	400	400	400
Ambient Temperature [K]	1	1	1	1	1	1	1
\alpha_{t}	.7	.7	.7	.7	.3	.5	.9
\beta_{t}	.8	.8	.8	.8	.8	.8	.8
Density	​movie	This one has a shorter time period due to the run reaching it's time limit. ​movie	​movie	​movie	​movie	​movie
Thermal Pressure	​movie	​movie	​movie	​movie	​movie	​movie	​movie
Other	Ram Pressure ​movie			The above images for both the density and thermal pressure imply that the mesh didn't refine in the middle of the jet so below is an image showing the mesh plotted over the thermal pressure and it appears to not have refined an ~10,000 x 10,000 AU box in the center of the jet. (The same is evident when the mesh is laid over the density plot).