Abstract Lutovinov

The precise timing of millisecond pulsars in radio and X-ray bands as a tool for the search of intermediate mass black holes in globular clusters

We consider the possibility of the detection of intermediate mass black holes (IMBH, 10³ - 10⁴ M_Sun ), whose presence in centers of some globular clusters is assumed from optical and infrared observations, using the precise timing of pulse arrival times of known millisecond pulsars in globular clusters. For several of them, located mostly close to centers of clusters, the expected time delays of their radiation in the gravitational filed of the central black hole are calculated. It is shown that the detection of such a delay by current instruments can be possible only for the mass of central object >=10⁴ M_Sun and only for 1 or 2 globular clusters. We also considered the influence of the delay on changes of pulse period and its first derivative and shown that it will be negligible in a comparison with the current accuracy of their measurements. Nevertheless, in a future, with the progress in the observational instruments and technique, this method can become one of a few direct observations of IMBHs.