Can the masses of the gas particles be considered random variables?

Yun Wang

14 Feb '23

Hi there,
For the gas, stars, and black holes, their masses are not constant for individual particle. Can their masses be considered random variables?

Dylan Nelson

14 Feb '23

I'm not sure exactly what you mean by random variables, or why this would be useful?

But, no. The Masses field is important, and it is not random. It tells you the mass of each particle or cell.

Yun Wang

15 Feb '23

By random variables, I mean whether the mass of each cell fits some kind of probability density distribution, like Poisson distribution.

Dylan Nelson

15 Feb '23

Yes you can look at Pillepich+2018 (Appendix A). The gas mass distribution is somewhat Gaussian, though not exactly, and is roughly constrained to within a factor of +/- 2 of the mean value. This occurs because of the cell (de)refinement choices.

Hi there,

For the gas, stars, and black holes, their masses are not constant for individual particle. Can their masses be considered random variables?

I'm not sure exactly what you mean by random variables, or why this would be useful?

But, no. The

`Masses`

field is important, and it is not random. It tells you the mass of each particle or cell.By random variables, I mean whether the mass of each cell fits some kind of probability density distribution, like Poisson distribution.

Yes you can look at Pillepich+2018 (Appendix A). The gas mass distribution is somewhat Gaussian, though not exactly, and is roughly constrained to within a factor of +/- 2 of the mean value. This occurs because of the cell (de)refinement choices.

Thank you so much for your reply.