A question about the effective spatial range of the MWPotential2014

[Jacob2718]

Dear prof. Bovy and community
I wanna know if there is a spatial limit of MWPotential2014. When I was simulating the trajectories in the galaxy of an object that is more than ten kpc far away, I found out that there were some truncation (or leaps) in its trajectories not changing regularly as expected.

[jobovy]

There is no spatial limit and it should be a good model out to many tens of kpc (or even hundreds of kpc). There definitely should not be strange features in the orbits. Maybe you could send an example? Note that you can drag figures into GitHub comment boxes to make them appear.

[Jacob2718]

Thank you for responding, sir. This is the figure and I was calculating the minimum distance between points on the trajectories and the center of the Galaxy (the min_radius in the figure). But when the distance is up to about 14 kpc, as you can see in the figure, some leap happens. I tried to improve the precision of the parameter values such as keep distance value tree decimals or sampling precision (0.5 million points per trajectory) but neither they did work.(Potential is MWPotential2014+KeplerPotential(amp=3.70*10**6./conversion.mass_in_msol(220.,8.)) for exactly)

[jobovy]

That does look strange! Without seeing the full code, I have no idea why this could happen. So if you could share the code, that might be helpful.

[Jacob2718]

Sorry for my belated reply, prof. Bovy. I appreciated it very much that you were willing to check my code but considering this is not my work alone so could I discuss with you about it by email?

[jobovy]

Sure!