Program: GN-2021B-Q-118

We wish to confirm that the stellar black hole in the high mass binary M33 X-7 is a source of relativistic jets, namely, a confirmed extragalactic microquasar. Our recent study with the upgraded VLA of NRAO reveals extended radio emission from M33 X-7 that ends at a distance of 53 pc in a knot of non-thermal radio emission associated with red emission, which resembles the lobes and bow-shocks usually observed in Galactic microquasars as SS433. From a deep Halpha image with Gemini we will determine the whole extension of a Halpha emission nebula, and will estimate the total time of jet injection, the jet power, and the total injected energy. From the spectroscopy we will confirm that the compact knot is in fact in M33, and will discriminate between bremsstrahlung emission of bow shocks and possible emission from HII regions. In summary, we will conclude that M33 X-7 is a confirmed extragalactic microquasar, and that the large bipolar Halpha emission usually observed around extragalactic ULXs are blown laterally by collimated microquasar jets.