I am studying the formation of peculiar galaxies using the TNG50-1 simulation. I have identified some galaxies, but I would like to follow their evolution with a higher time resolution. Unfortunately these galaxies do not fall in the subboxes, then I can not use that resource. So I am doing some tests to re-simulate them independently. I am tracking all particles within 10 stellar half mass radii form z=0 to snap_78 and extracting a box that contain these particles, and using this box as initial condition in Arepo. From this I have many questions some of them are:
When I extract the box, how should I apply cosmological correction to use it as IC?
Which parameters should I use for the GFM module and Star Formation model? I have reviewed the papers of Pillepich +2017 and Vogelsberger +2013 but I understand that parameters like WindEfficiency, WindEnergyIn1e51erg, and ThermalWindFraction may need adjustments depending the type of simulation.
I would appreciate your advice on these points or any additional recommendations you might have regarding the re-simulation process.
I noticed this recent paper in fact did this. It is the first time I have ever seen an extraction of particles used as a new IC. Perhaps there are some details of interest in that paper.
In general, however, this is not especially well posed. There will be all kinds of boundary effects, and long-range (gravity) effects. I would trust the results only for a short period of time.
Josue Lopez
25 Jan
Thank you so much for your quick reply and for directing me to that recent paper that did a similar particle extraction for new initial conditions. I'll definitely take a look to see what I can learn from their approach.
Do you think there might be another way to get a higher temporal resolution for the evolution of certain galaxies? Any advice or resources would be really helpful.
You could interpolate in time - it really depends on what you need to do.
The "true" way would be to create zoom ICs corresponding to that galaxy, and then re-run it, perhaps multiple times. But this is not currently easy to do.
Hello,
I am studying the formation of peculiar galaxies using the TNG50-1 simulation. I have identified some galaxies, but I would like to follow their evolution with a higher time resolution. Unfortunately these galaxies do not fall in the subboxes, then I can not use that resource. So I am doing some tests to re-simulate them independently. I am tracking all particles within 10 stellar half mass radii form z=0 to snap_78 and extracting a box that contain these particles, and using this box as initial condition in Arepo. From this I have many questions some of them are:
I would appreciate your advice on these points or any additional recommendations you might have regarding the re-simulation process.
Thank you very much.
Best
Josué Gerardo
I noticed this recent paper in fact did this. It is the first time I have ever seen an extraction of particles used as a new IC. Perhaps there are some details of interest in that paper.
In general, however, this is not especially well posed. There will be all kinds of boundary effects, and long-range (gravity) effects. I would trust the results only for a short period of time.
Thank you so much for your quick reply and for directing me to that recent paper that did a similar particle extraction for new initial conditions. I'll definitely take a look to see what I can learn from their approach.
Do you think there might be another way to get a higher temporal resolution for the evolution of certain galaxies? Any advice or resources would be really helpful.
Thanks again for your help,
Best,
Josué Gerardo
You could interpolate in time - it really depends on what you need to do.
The "true" way would be to create zoom ICs corresponding to that galaxy, and then re-run it, perhaps multiple times. But this is not currently easy to do.