future events

Galaxy Groups I

TYPEAstrophysics Seminar
Speaker:Prof. Brent Tully
Affiliation:Institute for Astronomy, Hawaii
Organizer:Adi Nusser
Parent Event:The Near Field Cosmology
Abstract: Groups contain tens of galaxies bound by the mean gravitational field of their individual dark matter halos. They are generally relaxed (in viral equilibrium) and are typically free from the complications of gas dynamics and radiative processes.  Properties of groups over 4 decades of mass will be reviewed: scaling relations, luminosity functions, halo mass function, and the construction of group catalogs.