Bibcode
Cava, A.; Bettoni, D.; Poggianti, B. M.; Couch, W. J.; Moles, M.; Varela, J.; Biviano, A.; D'Onofrio, M.; Dressler, A.; Fasano, G.; Fritz, J.; Kjærgaard, P.; Ramella, M.; Valentinuzzi, T.
Referencia bibliográfica
Astronomy and Astrophysics, Volume 495, Issue 3, 2009, pp.707-719
Fecha de publicación:
3
2009
Revista
Número de citas
140
Número de citas referidas
139
Descripción
Aims: We present the results from a comprehensive spectroscopic survey
of the WINGS (WIde-field Nearby Galaxy-cluster Survey) clusters, a
program called WINGS-SPE. The WINGS-SPE sample consists of 48 clusters,
22 of which are in the southern sky and 26 in the north. The main goals
of this spectroscopic survey are: (1) to study the dynamics and
kinematics of the WINGS clusters and their constituent galaxies, (2) to
explore the link between the spectral properties and the morphological
evolution in different density environments and across a wide range of
cluster X-ray luminosities and optical properties. Methods: Using
multi-object fiber-fed spectrographs, we observed our sample of WINGS
cluster galaxies at an intermediate resolution of 6-9 Å and, using
a cross-correlation technique, we measured redshifts with a mean
accuracy of ~45 km s-1. Results: We present redshift
measurements for 6137 galaxies and their first analyses. Details of the
spectroscopic observations are reported. The WINGS-SPE has ~30% overlap
with previously published data sets, allowing us both to perform a
complete comparison with the literature and to extend the catalogs. Conclusions: Using our redshifts, we calculate the velocity dispersion
for all the clusters in the WINGS-SPE sample. We almost triple the
number of member galaxies known in each cluster with respect to previous
works. We also investigate the X-ray luminosity vs. velocity dispersion
relation for our WINGS-SPE clusters, and find it to be consistent with
the form Lx ∝ σ_v^4.
Table 4, containing the complete redshift catalog, is only available in
electronic form at the CDS via anonymous ftp to cdsarc.u-strasbg.fr
(130.79.128.5) or via
http://cdsweb.u-strasbg.fr/cgi-bin/qcat?J/A+A/495/707
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Ismael
Pérez Fournon