The frequency of occurrence of stars, particles, or other celestial objects, per specified volume of space.
〔天文〕空间密度
Example sentencesExamples
If these are massive early-type galaxies their space density exceeds the expectations based on hierarchical clustering models.
Our study helps address the space density at low redshift, thus allowing us to get a more definitive measure of the evolution in number of these systems.
Spherical harmonics were fit to the pitch and phase distributions in order to obtain fluxes from which phase space densities could be computed.
Independent of one's redshift model, substantial changes in the luminosity function or space density of quasars and radio galaxies have occurred.
For a Gaussian model, the effects of multi-particles Bose-Einstein correlations on the mean phase space density are studied.
Definition of space density in US English:
space density
noun
Astronomy
The frequency of occurrence of stars, particles, or other heavenly bodies, per specified volume of space.
〔天文〕空间密度
Example sentencesExamples
For a Gaussian model, the effects of multi-particles Bose-Einstein correlations on the mean phase space density are studied.
Our study helps address the space density at low redshift, thus allowing us to get a more definitive measure of the evolution in number of these systems.
Spherical harmonics were fit to the pitch and phase distributions in order to obtain fluxes from which phase space densities could be computed.
Independent of one's redshift model, substantial changes in the luminosity function or space density of quasars and radio galaxies have occurred.
If these are massive early-type galaxies their space density exceeds the expectations based on hierarchical clustering models.