$\phi$ meson production in Au-Au collisions at $\sqrt{s_{N}}$ = 200 GeV

$phi$ meson is s significant probe to study the deconfined matter produced 
by relativistic heavy ion collisions. The line shape measurement of the phi
mesons is a powerful tool in the search for in-medium
modifications of vector meson properties (mass and/or width) as chiral
symmetry restoration is approached. Consisting of ss-bar the phi meson
is also a sensitive probe of strangeness production. The PHENIX experiment
at RHIC, with its excellent phi mass resolution (comparable or better
than the natural width of the phi meson), has measured the phi meson line 
shape and yield at different centralities in the Au-Au collisions at
$\sqrt{s_{NN}}$ = 200 GeV. The results on phi meson production in PHENIX will 
be presented and discussed.