I have a question about the dimension of the data, how can we define/determine it and what does it depend?
For example, Parent Halo ID: 1596, in the Gas section, there are 110,203 data. So according to the Data Specifications, it is the dimension N; I wonder that if the N here is randomly for each ID because I cannot find any relation with the number 110,203. As far as I know, TNG simulation is a cube, so I think N here should be a perfect cube number (volume) or maybe a perfect square number (area of a snapshot); however, it turns out neither of them.
Thank you in advance,
Thang Huynh
Dylan Nelson
9 Aug '23
In the Data Specifications for the snapshot data, N refers to the total number of particles/cells of that type.
If instead you are considering a cutout of a single (sub)halo, then N would be the total number of particles/cells of that type in that (sub)halo.
The spatial domain of each simulation is a (periodic) cube.
The total number of dark matter particles is constant, and is also an integer cubed, e.g. 1820^3 in the case of TNG100-1. However, the number of e.g. gas cells is not constant, changes with time, and is not exactly 1820^3.
Dear all,
I have a question about the dimension of the data, how can we define/determine it and what does it depend?
For example, Parent Halo ID: 1596, in the Gas section, there are 110,203 data. So according to the Data Specifications, it is the dimension N; I wonder that if the N here is randomly for each ID because I cannot find any relation with the number 110,203. As far as I know, TNG simulation is a cube, so I think N here should be a perfect cube number (volume) or maybe a perfect square number (area of a snapshot); however, it turns out neither of them.
Thank you in advance,
Thang Huynh
In the Data Specifications for the snapshot data,
Nrefers to the total number of particles/cells of that type.If instead you are considering a cutout of a single (sub)halo, then
Nwould be the total number of particles/cells of that type in that (sub)halo.The spatial domain of each simulation is a (periodic) cube.
The total number of dark matter particles is constant, and is also an integer cubed, e.g.
1820^3in the case of TNG100-1. However, the number of e.g. gas cells is not constant, changes with time, and is not exactly 1820^3.