SIMBAD references

2003A&A...408..905C - Astronomy and Astrophysics, volume 408, 905-913 (2003/9-4)

Nature and environment of Very Luminous Galaxies.


Abstract (from CDS):

The most luminous galaxies in the blue passband have a larger correlation amplitude than L* galaxies. They do not appear to be preferentially located in rich clusters or groups, but a significant fraction of them seem to be in systems which include fainter members. We present an analysis of fields centered on 18 Very Luminous Galaxies (MB≤-21) selected from the Southern Sky Redshift Survey 2, based on new observations and public data of the 2dF Galaxy Redshift Survey; we present also additional data on a CfA VLG and on Arp 127. We find that all the selected VLGs are physically associated with fainter companions. Moreover, there is a relation between the VLG morphology (early or late) and the dynamical properties of the system, which reflects the morphology-density relation. 6 out of the 18 SSRS2 VLGs are early type galaxies: 2 are in the center of rich Abell clusters with velocity dispersion σ∼600km/s, and the other 4 are in poor clusters or groups with σ∼300. The VLG extracted from the CfA catalog is also an elliptical in a Zwicky cluster. The remaining 2/3 of the sample are late-type VLGs, generally found in poorer systems with a larger spread in velocity dispersion, from ∼100 up to ∼750km/s. The low velocity dispersion, late-type VLG dominated systems appear to be analogous to our own Local Group. The possibile association of VLG systems with dark matter halos with mass comparable to rich groups or clusters, as suggested by the comparable correlation amplitude, would imply significant differences in the galaxy formation process. This work also shows that observing fields around VLGs represents an effective way of identifying galaxy systems which are not selected through other traditional techniques.

Abstract Copyright:

Journal keyword(s): cosmology: observations - galaxies: distances and redshifts - galaxies: kinematics and dynamics

VizieR on-line data: <Available at CDS (J/A+A/408/905): table1.dat table2.dat tableb.dat>

Nomenclature: Tables 1, B1-B15: [CBD2003] VLG NNN NNN N=802, [CBD2003] VLG 0716+5323 N (Nos 1-9).

Status at CDS : All or part of tables of objects will not be ingested in SIMBAD.

CDS comments: Table 1 : VLG 0716+5323 field = LEDA 20561 field, Z1261 = RXC J0716.7+5324.

Simbad objects: 35

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