SIMBAD references

2017ApJ...843...16K - Astrophys. J., 843, 16-16 (2017/July-1)

Galaxy groups within 3500 km s–1.


Abstract (from CDS):

A study of the group properties of galaxies in our immediate neighborhood provides a singular opportunity to observationally constrain the halo mass function, a fundamental characterization of galaxy formation. Detailed studies of individual groups have provided the coefficients of scaling relations between a proxy for the virial radius, velocity dispersion, and mass that usefully allow groups to be defined over the range 1010–1015M. At a second hierarchical level, associations are defined as regions around collapsed halos extending to the zero-velocity surface at the decoupling from cosmic expansion. The most remarkable result of the study emerges from the construction of the halo mass function from the sample. At ∼1012 M, there is a jog from the expectation Sheth-Tormen function, such that halo counts drop by a factor ∼3 in all lower mass bins.

Abstract Copyright: © 2017. The American Astronomical Society. All rights reserved.

Journal keyword(s): dark matter - galaxies: groups: general - galaxies: luminosity function, mass function - galaxies: luminosity function, mass function

VizieR on-line data: <Available at CDS (J/ApJ/843/16): table2.dat table3.dat table4.dat>

Simbad objects: 12390

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