  Currently there is intense interest in the properties of the Quark-Gluon
Plasma produced in peripheral collisions of heavy ions at various facilities,
such as the RHIC. In particular, it is essential to understand the difference
between such plasmas and their more readily understood counterparts produced in
nearly central collisions. The differences arise primarily from the intense
magnetic and vorticity fields generated in the QGP in the peripheral case. It
has been argued that the magnetic fields might have a profound effect on QGP
thermodynamics. Here we will argue, using a gauge-gravity model incorporating
the recently proposed holographic vorticity bound, that vorticity also has
important consequences for the plasma thermodynamics, in particular, for the
entropy density at a given impact energy. A crucial point in our analysis is
the need to determine the fate of bulk gravitational parameters when the
duality translates them to the boundary.
