Gas disk rotational speed in unit of circular speed
Kunyang Li
14 Apr '21
Hi, Dylan,
Hope everything is going well!
I need the gas disk or stellar disk rotational velocity of galaxies in unit of the circular velocity. I wonder is there anyway to find this information in TNG50 and TNG300?
Thank you very much for your help!!
Best regards,
Lily
Dylan Nelson
14 Apr '21
Hello,
The only catalog value related to rotation velocity is SubhaloVmax described as "Maximum value of the spherically-averaged rotation curve".
If you want an actual rotation velocity of gas or stars, you would need to compute this yourself from the particle data. You could follow a procedure similar to that in Pillepich+2019 (page 8) for example.
Hi, Dylan,
Hope everything is going well!
I need the gas disk or stellar disk rotational velocity of galaxies in unit of the circular velocity. I wonder is there anyway to find this information in TNG50 and TNG300?
Thank you very much for your help!!
Best regards,
Lily
Hello,
The only catalog value related to rotation velocity is
SubhaloVmaxdescribed as "Maximum value of the spherically-averaged rotation curve".If you want an actual rotation velocity of gas or stars, you would need to compute this yourself from the particle data. You could follow a procedure similar to that in Pillepich+2019 (page 8) for example.