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Thermalization and collective flow of charm (c) and bottom (b) quarks inultra-relativistic heavy-ion collisions are evaluated based on elastic partonrescattering in an expanding quark-gluon plasma (QGP). We show that resonantinteractions in a strongly interacting QGP (sQGP), as well as the effects ofparton coalescence, can play an essential role in the interpretation of recentdata from the Relativistic Heavy-Ion Collider (RHIC), and thus illuminate thenature of the sQGP and its hadronization. Our main assumption, motivated byrecent findings in lattice computations of Quantum Chromodynamics, is theexistence of D- and B-meson states in the sQGP, providing resonant crosssections for heavy quarks up to temperatures of sim 2 T_c. Pertinent drag anddiffusion coefficients are implemented into a relativistic Langevin simulationto compute transverse-momentum spectra and azimuthal asymmetries (v_2) of b-and c-quarks in Au-Au collisions at RHIC. Hadronization into D- and B-mesons iscalculated from a combination of coalescence with light quarks andfragmentation, and associated electron-decay spectra and v_2 are compared torecent RHIC data. We also comment on the relative importance of radiative andelastic energy loss of heavy quarks in the QGP.Comment: 4 pages, 3 figures, v2: 1 reference updated, v3: replaced comparison  to data to more recent data, references added, contents unchange

Heavy-quark probes of the quark-gluon plasma and interpretation of recent data taken at the BNL Relativistic Heavy Ion Collider