Heavy flavor physics at RHIC

Open heavy flavor and quarkonium is powerful tool to investigate the properties of the hot and dense medium created in high energy heavy ion collisions.
They are produced via initial hard scattering, and thus are affected by the entire evolution of the medium.
 We observed a large suppression and significant azimuthal anisotropy in the measurement of single electron from heavy quark decays. To understand these effects in more detail, the systematic study of the heavy quark modification was performed with the various collision energies and collision species. 
 Recently, the RHIC experiments upgraded the detectors; PHENIX installed a silicon vertex detector (VTX) at mid and forward rapidity, STAR installed the silicon heavy flavor tracker (HFT) and muon telescope detector (MTD) at mid rapidity. These new detectors enhance the capability of heavy flavor measurements. Especially, the silicon detector enables to separate the charm and bottom productions via the precise tracking. With these upgrades, PHENIX and STAR recorded a large amount of data. 
New interesting results are reported from both PHEINX and STAR: bottom and charm suppression 
in single electrons and $D_0$, heavy flavor flow, sequential suppression of Upsilons, and more.
 In this talk, the recent measurements of the heavy flavor production at RHIC are presented and their modifications in the medium are discussed.