I noticed there is an EnergyDissipation field for gascell. Its unit is listed as '$(1/a)10^{10}M_\odot/ckpc(km/s)^3$', but the notes state that converting it to physical units only requires multiplying by (1/a). I'm confused because there is already a (1/a) in the unit, and converting from ckpc to pkpc also requires a (1/a) factor, so if the final converting factor is (1/a)^2?
Looking forward to your reply. Thanks!
Zhang
Dylan Nelson
29 Apr
You are right, the units are not clear here.
It should be (1/a) UnitEnergy/UnitTime i.e. (1/a) UnitMass/UnitLength*UnitVelocity^3 where the unit system is 1e10 Msun, 1 kpc, and 1 km/s.
So, only scale factor. I will update the documentation.
Dear Prof.Nelson,
I noticed there is an EnergyDissipation field for gascell. Its unit is listed as '$(1/a)10^{10}M_\odot/ckpc(km/s)^3$', but the notes state that converting it to physical units only requires multiplying by (1/a). I'm confused because there is already a (1/a) in the unit, and converting from ckpc to pkpc also requires a (1/a) factor, so if the final converting factor is (1/a)^2?
Looking forward to your reply. Thanks!
Zhang
You are right, the units are not clear here.
It should be
(1/a) UnitEnergy/UnitTimei.e.(1/a) UnitMass/UnitLength*UnitVelocity^3where the unit system is 1e10 Msun, 1 kpc, and 1 km/s.So, only scale factor. I will update the documentation.