Sadowski, A.Sironi, L.Abarca, D.Guo, X.Ozel, F.Narayan, Ramesh2016-08-042013Sadowski, A., L. Sironi, D. Abarca, X. Guo, F. Ozel, and R. Narayan. 2013. “Radio Light Curves During the Passage of Cloud G2 Near Sgr A*.” Monthly Notices of the Royal Astronomical Society 432 (1) (April 12): 478–491. doi:10.1093/mnras/stt495.0035-8711http://nrs.harvard.edu/urn-3:HUL.InstRepos:27804410We calculate radio light curves produced by the bow shock that is likely to form in front of the G2 cloud when it penetrates the accretion disk of Sgr A∗ . The shock acceleration of the radioemitting electrons is captured self-consistently by means of first-principles particle-in-cell simulations. We show that the radio luminosity is expected to reach maximum in early 2013, roughly a month after the bow shock crosses the orbit pericenter. We estimate the peak radio flux at 1.4 GHz to be 1.4 − 22 Jy depending on the assumed orbit orientation and parameters. We show that the most promising frequencies for radio observations are in the 0.1 < ν < 1 GHz range, for which the bow shock emission will be much stronger than the intrinsic radio flux for all the models considered.en-USaccretionaccretion disksblack hole physicsrelativityacceleration of particlesradiation mechanisms: non-thermalJournal Article2016-08-0410.1093/mnras/stt495