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Using the VIMOS Integral Field Unit (IFU) spectrograph on the Very Large Telescope (VLT), we have spatially mapped the kinematic properties of 10 nearby Brightest Cluster Galaxies (BCGs) and 4 BCG companion galaxies located within a redshift of z = 0:1. In the hierarchical formation model, these massive galaxies (10 10:5 M < Mdyn < 10 11:9 M ) are expected to undergo more mergers than lower mass galaxies, and simulations show that dry minor mergers can remove angular momentum. We test whether BCGs have low angular momenta by using the lRe parameter developed by the SAURON and ATLAS 3D teams and combine our kinematics with Sloan Digital Sky Survey (SDSS) photometry to analyze the BCGs’ merger status. We find that 30% (3/10) of the BCGs and 100% of the companion galaxies (4/4) are fast rotators as defined by the ATLAS 3D criteria. We find that above Mdyn 11:5M , virtually all galaxies regardless of environment are slow rotators. To search for signs of recent merging, we analyze the photometry of each system and use the G M20 selection criteria to identify mergers. We find that 40 20% of our BCGs are currently undergoing or have recently undergone a merger (within 0.2 Gyrs). Surprisingly, we find no correlation between galaxies with high angular momentum and morphological signatures of merging.

IFU Spectroscopy of BCGs and Their Companions: Angular Momentum and Dynamical Mass