Segregation Effects According to the Evolutionary Stage of Galaxy Groups
  We study segregation phenomena in 57 groups selected from the 2PIGG catalog
of galaxy groups. The sample corresponds to those systems located in areas of
at least 80% redshift coverage out to 10 times the radius of the groups. The
dynamical state of the galaxy systems was determined after studying their
velocity distributions. We have used the Anderson-Darling test to distinguish
relaxed and non-relaxed systems. This analysis indicates that 84% of groups
have galaxy velocities consistent with the normal distribution, while 16% of
them have more complex underlying distributions. Properties of the member
galaxies are investigated taking into account this classification. Our results
indicate that galaxies in Gaussian groups are significantly more evolved than
galaxies in non-relaxed systems out to distances of about 4R200, presenting
signficantly redder (B-R) color. We also find evidence that galaxies with M_R <
-21.5 in Gaussian groups are closer to the condition of energy equipartition.
