THE CIRCULAR VELOCITY FUNCTION OF GROUP GALAXIES

THE CIRCULAR VELOCITY FUNCTION OF GROUP GALAXIES

A robust prediction of ACDM cosmology is the halo circular velocity function (CVF), a dynamical cousin of the halo mass function. The correspondence between theoretical and observed CVFs is uncertain, however: cluster galaxies are reported to exhibit a power-law CVF consistent with N-body simulation...

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Veröffentlicht in:The Astrophysical journal 2014-09, Vol.793 (1), p.1-15
Hauptverfasser: Abramson, Louis E, Williams, Rik J, Benson, Andrew J, Kollmeier, Juna A, MULCHAEY, JOHN S
Format: Artikel
Sprache:eng
Schlagworte:
ASTROPHYSICS, COSMOLOGY AND ASTRONOMY
BENCHMARKS
Circularity
Clusters
COMPARATIVE EVALUATIONS
COSMOLOGY
Dynamical systems
Flattening
FORECASTING
GALAXIES
GALAXY CLUSTERS
Halos
LUMINOSITY
MASS
MULTIPLICITY
Photometry
SIMULATION
Slopes
VELOCITY
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Zusammenfassung:A robust prediction of ACDM cosmology is the halo circular velocity function (CVF), a dynamical cousin of the halo mass function. The correspondence between theoretical and observed CVFs is uncertain, however: cluster galaxies are reported to exhibit a power-law CVF consistent with N-body simulations, but that of the field is distinctly Schechter-like, flattened compared to ACDM expectations at circular velocities [upsilon] sub(c) [
ISSN:1538-4357
0004-637X
1538-4357
DOI:10.1088/0004-637X/793/1/49