Bibcode
Jeeson-Daniel, Akila; Dalla Vecchia, C.; Haas, Marcel R.; Schaye, Joop
Bibliographical reference
Monthly Notices of the Royal Astronomical Society: Letters, Volume 415, Issue 1, pp. L69-L73.
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7
2011
Citations
43
Refereed citations
40
Description
We investigate the correlation between nine different dark matter halo
properties using a rank correlation analysis and a Principal Component
Analysis for a sample of haloes spanning five orders of magnitude in
mass. We consider mass and dimensionless measures of concentration, age,
relaxedness, sphericity, triaxiality, substructure, spin and
environment, where the latter is defined in a way that makes it
insensitive to mass. We find that concentration is the most fundamental
property. Except for environment, all parameters are strongly correlated
with concentration. Concentration, age, substructure, mass, sphericity
and relaxedness can be considered a single family of parameters, albeit
with substantial scatter. In contrast, spin, environment and triaxiality
are more independent, although spin does correlate strongly with
substructure and both spin and triaxiality correlate substantially with
concentration. Although mass sets the scale of a halo, all other
properties are more sensitive to concentration.