All Questions
5
questions
0
votes
0
answers
46
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Consistent values for density of galaxies between degree squared and steradian
I have a table of densities of galaxies :
Expected number density of galaxies for photometric survey per unit area and redshift intervals, $\mathrm{d} N / \mathrm{d} \Omega \mathrm{d} z\left[\mathrm{...
1
vote
0
answers
46
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How do I create a comoving quantity using YT?
I can assign a unit to a scalar using:
x = YTQuantity(scalar, 'kpc')
but how would I specify that the unit should be kpccm? Perhaps it doesn't even make sense to do so? Something as simple as this is ...
- 11
4
votes
2
answers
739
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'Little h' usage in cosmological simulations
I am running a cosmological simulation and am having some trouble putting things into code units. The physical distance units in my simulation are in terms of $\text{Mpc/h}$, where $h$ is the ...
- 141
2
votes
1
answer
318
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Neutrino Modelling in Friedmann Equation
I'm trying to model neutrinos in the Friedmann Equation. I've covered the case of the Benchmark Model where we have matter, radiation, curvature, and the cosmological constant, Lambda. I know my ...
9
votes
1
answer
4k
views
How to convert density from physical unit to comoving unit?
I am learning co-moving units and I am interested to see how the conversion works. If Hubble constant is assumed to be 0.7, then I want to convert $1gm/cm^3$ into comoving unit. If I want to express ...
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