Optical spectroscopy of 76 galaxies, 48 of which are projected in the direction of the Virgo cluster and 28 onto the Coma-A1367 supercluster, is reported. Adding these new measurements to those found in the literature, the redshift completeness in the Virgo region becomes 92% at B-T less than or equal to 16.0 and 68% at B-T less than or equal to 18.0. The one of CGCG galaxies in the direction of the Coma-A1367 supercluster becomes 98%. The Virgo cluster membership estimates obtained on morphological grounds by Binggeli et al. (1985) are confirmed in all cases. However, several "possible members" classified as BCD (if in the cluster) are found instead to be giant emission-line galaxies in the background of the Virgo cluster.
Gavazzi, G., Bonfanti, C., Pedotti, P., Boselli, A., Carrasco, L. (2000). Optical spectroscopy of galaxies in the direction of the Virgo cluster. ASTRONOMY & ASTROPHYSICS SUPPLEMENT SERIES, 146(2), 259-265 [10.1051/aas:2000270].
Optical spectroscopy of galaxies in the direction of the Virgo cluster
GAVAZZI, GIUSEPPE
;
2000
Abstract
Optical spectroscopy of 76 galaxies, 48 of which are projected in the direction of the Virgo cluster and 28 onto the Coma-A1367 supercluster, is reported. Adding these new measurements to those found in the literature, the redshift completeness in the Virgo region becomes 92% at B-T less than or equal to 16.0 and 68% at B-T less than or equal to 18.0. The one of CGCG galaxies in the direction of the Coma-A1367 supercluster becomes 98%. The Virgo cluster membership estimates obtained on morphological grounds by Binggeli et al. (1985) are confirmed in all cases. However, several "possible members" classified as BCD (if in the cluster) are found instead to be giant emission-line galaxies in the background of the Virgo cluster.
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