SIMBAD references

2012ApJ...752...67K - Astrophys. J., 752, 67 (2012/June-2)

Mapping the galactic center with gravitational wave measurements using pulsar timing.


Abstract (from CDS):

We examine the nHz gravitational wave (GW) foreground of stars and black holes (BHs) orbiting SgrA* in the Galactic center. A cusp of stars and BHs generates a continuous GW spectrum below 40 nHz; individual BHs within 1 mpc to SgrA* stick out in the spectrum at higher GW frequencies. The GWs and gravitational near-field effects can be resolved by timing pulsars within a few pc of this region. Observations with the Square Kilometer Array may be especially sensitive to intermediate-mass BHs in this region, if present. A 100 ns-10 µs timing accuracy is sufficient to detect BHs of mass 1000 M with pulsars at distance 0.1-1 pc in a 3 yr observation baseline. Unlike electromagnetic imaging techniques, the prospects for resolving individual objects through GW measurements improve closer to SgrA*, even if the number density of objects steeply increases inward. Scattering by the interstellar medium will pose the biggest challenge for such observations.

Abstract Copyright:

Journal keyword(s): galaxies: nuclei - gravitational waves - pulsars: general

Simbad objects: 6

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