paper

Stellar binary black holes in the LISA band: a new class of standard sirens

arXiv:1703.01300 · doi:10.1093/mnras/sty057

Abstract

The recent Advanced LIGO detections of coalescing black hole binaries (BHBs) imply a large population of such systems emitting at milli-Hz frequencies, accessible to the Laser Interferometer Space Antenna (LISA). We show that these systems provide a new class of cosmological standard sirens. Direct LISA luminosity distance -- measurements, combined with the inhomogeneous redshift -- distribution of possible host galaxies provide an effective way to populate the diagram at , thus allowing a precise local measurement of the Hubble expansion rate. To be effective, the method requires a sufficiently precise LISA distance determination and sky localization of a sizeable number of BHBs, which is best achieved for a 6-link detector configuration. We find that, for a BHB population consistent with current fiducial LIGO rates, the Hubble constant can be determined at the 5% and 2% level (68% confidence) assuming two and five million Km arm-length respectively.

9 pages 4 figures, to be submitted to MNRAS

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