with_H0¶
- astropy.cosmology.units.with_H0(H0=None)[source]¶
Convert between quantities with little-h and the equivalent physical units.
- Parameters:
- H0
None
orQuantity
[:ref: ‘frequency’] The value of the Hubble constant to assume. If a
Quantity
, will assume the quantity isH0
. IfNone
(default), use theH0
attribute fromdefault_cosmology
.
- H0
References
For an illuminating discussion on why you may or may not want to use little-h at all, see https://arxiv.org/pdf/1308.4150.pdf