Ginsburg, IdanWang, XiaweiLoeb, AbrahamCohen, Ofer2017-05-312015Ginsburg, Idan, Xiawei Wang, Abraham Loeb, and Ofer Cohen. 2015. “Detecting Stars at the Galactic Centre via Synchrotron Emission.” Monthly Notices of the Royal Astronomical Society: Letters 455 (1) (October 20): L21–L25. doi:10.1093/mnrasl/slv138.1745-3925http://nrs.harvard.edu/urn-3:HUL.InstRepos:32750899Stars orbiting within 1$\arcsec$ of the supermassive black hole in the Galactic Centre, Sgr A*, are notoriously difficult to detect due to obscuration by gas and dust. We show that some stars orbiting this region may be detectable via synchrotron emission. In such instances, a bow shock forms around the star and accelerates the electrons. We calculate that around the 10 GHz band (radio) and at 1014 Hz (infrared) the luminosity of a star orbiting the black hole is comparable to the luminosity of Sgr A*. The strength of the synchrotron emission depends on a number of factors including the star's orbital velocity. Thus, the ideal time to observe the synchrotron flux is when the star is at pericenter. The star S2 will be $\sim 0.015\arcsec$ from Sgr A* in 2018, and is an excellent target to test our predictions.en-USblack hole physicsradiation mechanisms: non-thermalGalaxy: centreGalaxy: kinematics and dynamicsJournal Article2017-02-1420152017-05-3110.1093/mnrasl/slv138