[0902.4689] Can the Known Millisecond Pulsars Help in the Detection of Intermediate-Mass Black Holes at the Centers of Globular Clusters?

Authors: T.I. Larchenkova (1), A.A. Lutovinov (2) ((1) - Astro Space Center of the P.N.Lebedev Physical Institute, Moscow, Russia, (2) - Space Research Institute, Moscow, Russia)

Date: 26 Feb 2009

Abstract: We consider the possibility of detecting intermediate-mass ($10ˆ3-10ˆ4 M_{\odot}$) black holes, whose existence at the centers of globular clusters is expected from optical and infrared observations, using precise pulse arrival timing for the millisecond pulsars in globular clusters known to date. For some of these pulsars closest to the cluster centers, we have calculated the expected delay times of pulses as they pass in the gravitational field of the central black hole. The detection of such a time delay by currently available instruments for the known pulsars is shown to be impossible at a black hole mass of $10ˆ3 M_{\odot}$ and very problematic at a black hole mass of $10ˆ4 M_{\odot}$. In addition, the signal delay will have a negligible effect on the pulsar periods and their first derivatives compared to the current accuracy of their measurements.

abs pdf

Feb 27, 2009

0902.4689 (/preprints)
2009-02-27, 09:40 [edit]

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