The majestic discovery of the first source of high frequency gravitational waves, GW150914, and of four companion sources by the LIGO and Virgo Collaboration herald the birth of a new era of exploration of the Universe. In this context, I review on our current understanding on the formation of stellar black holes, and their impact on fondamental physics.
I then move into the low frequency...
3C 186 is a powerful radio-loud QSO at z~1. Recently we found that its spectrum shows evidence for significant velocity offsets between the broad and narrow emission line systems. This, as well as the presence of a spatial offset between the QSO and the center of its host galaxy, led us to propose this object as one of the rare examples of gravitational wave recoiling black hole candidates...
