Pulsar Timing and the Detection of Black Hole Binary Systems in Globular Clusters
Open Access
- 20 June 2005
- journal article
- Published by American Astronomical Society in The Astrophysical Journal
- Vol. 627 (2), L125-L128
- https://doi.org/10.1086/431949
Abstract
The possible existence of intermediate mass binary black holes (IMBBHs) in globular clusters (GCs) offers a unique geometry in which to detect space-time oscillations. For certain pulsar-IMBBH configurations possible within a GC, the usual far-field plane wave approximation for the IMBBH metric perturbation severely underestimates the magnitude of the induced pulsar pulse time-of-arrival (TOA) fluctuations. In this letter, the expected TOA fluctuations induced by an IMBBH lying close to the line-of-sight between a pulsar and the Earth are calculated for the first time. For an IMBBH consisting of 10 Msolar and 10^3 Msolar components, a 10 year orbital period, and located 0.1 lyr from the Earth-Pulsar line of sight, the induced pulsar timing residual amplitude will be of order 5 to 500 ns.Comment: Accepted into ApJ Letters. This is a slightly augmented version containing one extra figurKeywords
This publication has 15 references indexed in Scilit:
- Pulsars as tools for fundamental physics & astrophysicsNew Astronomy Reviews, 2004
- Strong-field tests of gravity using pulsars and black holesNew Astronomy Reviews, 2004
- INTERMEDIATE-MASS BLACK HOLESInternational Journal of Modern Physics D, 2004
- Three Binary Millisecond Pulsars in NGC 6266The Astrophysical Journal, 2003
- Further results from the timing of the millisecond pulsars in 47 TucanaeMonthly Notices of the Royal Astronomical Society, 2003
- Gravitational Radiation from Intermediate‐Mass Black HolesThe Astrophysical Journal, 2002
- Timing of Millisecond Pulsars in NGC 6752: Evidence for a High Mass-to-Light Ratio in the Cluster CoreThe Astrophysical Journal, 2002
- Observations of 20 Millisecond Pulsars in 47 Tucanae at 20 CentimetersThe Astrophysical Journal, 2000
- Two radio pulsars in the globular cluster NGC 6624Monthly Notices of the Royal Astronomical Society, 1994
- Pulsar timing measurements and the search for gravitational wavesThe Astrophysical Journal, 1979