Inference on gravitational waves from coalescences of stellar-mass compact objects and intermediate-mass black holes

Carl Johan Haster*, Zhilu Wang, Christopher Philip Luke Berry, Simon Stevenson, John Veitch, Ilya Mandel

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

28 Scopus citations

Abstract

Gravitational waves from coalescences of neutron stars or stellar-mass black holes into intermediate-mass black holes (IMBHs) of ≳100 solar masses represent one of the exciting possible sources for advanced gravitational-wave detectors. These sources can provide definitive evidence for the existence of IMBHs, probe globular-cluster dynamics, and potentially serve as tests of general relativity. We analyse the accuracy with which we can measure the masses and spins of the IMBH and its companion in intermediate-mass-ratio coalescences. We find that we can identify an IMBH with a mass above 100M with 95 per cent confidence provided the massive body exceeds 130M. For source masses above ~200M, the best measured parameter is the frequency of the quasi-normal ringdown. Consequently, the total mass is measured better than the chirp mass for massive binaries, but the total mass is still partly degenerate with spin, which cannot be accurately measured. Low-frequency detector sensitivity is particularly important for massive sources, since sensitivity to the inspiral phase is critical for measuring the mass of the stellar-mass companion. We show that we can accurately infer source parameters for cosmologically redshifted signals by applying appropriate corrections. We investigate the impact of uncertainty in the model gravitational waveforms and conclude that our main results are likely robust to systematics.

Original languageEnglish (US)
Pages (from-to)4499-4506
Number of pages8
JournalMonthly Notices of the Royal Astronomical Society
Volume457
Issue number4
DOIs
StatePublished - Feb 10 2016

Keywords

  • Black hole physics
  • Gravitational waves
  • Methods: data analysis

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Fingerprint

Dive into the research topics of 'Inference on gravitational waves from coalescences of stellar-mass compact objects and intermediate-mass black holes'. Together they form a unique fingerprint.

Cite this