Young close isolated compact objects
  We suggest that the seven radio-quiet isolated neutron stars observed with ROSAT are young cooling objects associated to recent near-by supernova explosions which formed runaway stars and the Local Bubble, affecting the topology of the interstellar medium in the vicinity of the Sun (within a few hundred parsecs). In the aftermath of these explosions, a few black holes might have been formed, according to the local initial mass function. We thus discuss the possibility of determining approximate positions of close-by isolated black holes using data on runaway stars and simple calculations of binary evolution and disruption. 
S.B. Popov (1), M.E. Prokhorov (1), M. Colpi (2), A. Treves (3), R.   Turolla (4) ((1) Sternberg Astronomical Institute, (2)...