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1996•The Astronomical JournalRequires access

Large-Scale Structure in the Direction of the Virgo Cluster

K. Flint, Chris Impey

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Abstract

We explore the distribution of galaxies behind the Virgo cluster out to z < 0.1, using the CfA redshift catalog, ZCAT, in conjunction with Abell clusters and pencil beam surveys as other tracers of large-scale structure. The field galaxies of ZCAT are found to trace the same overdensity as indicated by a supercluster defined by Abell clusters in the catalog of Einasto et al. [MNRAS, 269,351(1994)]. On even larger scales, galaxy peaks in three different pencil beam lines of sight toward the Virgo cluster are all found to fall at z ~ 0.08. We show this similarity in redshift to have a small probability of being caused by a random alignment, suggesting a sheet-like structure at that redshift, spanning >~ 150h_75_^-1^ Mpc.

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What this paper is about

We explore the distribution of galaxies behind the Virgo cluster out to z < 0.1, using the CfA redshift catalog, ZCAT, in conjunction with Abell clusters and pencil beam surveys as other tracers of large-scale structure. The field galaxies of ZCAT are found to trace the same overdensity as indicated by a supercluster defined by Abell clusters in the catalog of Einasto et al. [MNRAS, 269,351(1994)]. On even larger scales, galaxy peaks in three different pencil beam lines of sight toward the Virgo cluster are all found to fall at z ~ 0.08. We show this similarity in redshift to have a small probability of being caused by a random alignment, suggesting a sheet-like structure at that redshift, spanning >~ 150h_75_^-1^ Mpc.

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Available abstract

We explore the distribution of galaxies behind the Virgo cluster out to z < 0.1, using the CfA redshift catalog, ZCAT, in conjunction with Abell clusters and pencil beam surveys as other tracers of large-scale structure. The field galaxies of ZCAT are found to trace the same overdensity as indicated by a supercluster defined by Abell clusters in the catalog of Einasto et al. [MNRAS, 269,351(1994)]. On even larger scales, galaxy peaks in three different pencil beam lines of sight toward the Virgo cluster are all found to fall at z ~ 0.08. We show this similarity in redshift to have a small probability of being caused by a random alignment, suggesting a sheet-like structure at that redshift, spanning >~ 150h_75_^-1^ Mpc.

Key concepts: Physics, Virgo Cluster, Cluster (spacecraft), Scale (ratio), Astronomy, Astrophysics, Galaxy cluster, Galaxy

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