Multiband gravitational-wave astronomy: Observing binary inspirals with a decihertz detector, B-DECIGO
By Soichiro Isoyama, H. Nakano, Takashi Nakamura. Progress of Theoretical and Experimental Physics, 2018
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An evolving Japanese gravitational-wave (GW) mission at deci-Hz band: B-DECIGO (DECihertz laser Interferometer Gravitational wave Observatory) will enable us to detect GW150914-like binary black-holes, GW170817-like binary neutron-stars, and the intermediate mass binary black-holes out to cosmological distances. The B-DECIGO band slots in between the aLIGO-Virgo-KAGRA-IndIGO (hecto-Hz) and LISA (milli-Hz) bands to broader bandwidth, and these sources emit GWs for weeks to years across the multiband to accumulate high signal-to-noise ratios. This suggests the possibility that the joint detection would greatly improve the parameter estimation of the binaries. We examine the B-DECIGO's ability to measure binary parameters and assess what extent multiband analysis could improve such measurement, thanks to the broader bandwidth. Using non-precessing post-Newtonian waveforms with Fisher matrix approach, we find for systems like GW150914 and GW170817 that B-DECIGO can measure the mass ratio to within $< 0.1\%$, the individual black-hole spins to within $< 10\%$, and the coalescence time to within $< 2\,$s about a week before to alert aLIGO and electromagnetic facilities. aLIGO having prior information from B-DECIGO can further reduce the uncertainty in the measurement of, e.g., certain neutron-star tidal deformability by factor of $\sim 4$. Joint LISA and B-DECIGO measurement will also be able to recover masses and spins of intermediate mass binary black-holes at percent-level precision. However, there will be large systematic bias in these results due to post-Newtonian approximation to exact GW signals.
Subfields: Astronomy and Astrophysics, Geophysics, Ocean Engineering
View Paper: https://www.semanticscholar.org/paper/caed7513c884b4183c82e4a83dc788c400afed67
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Citations in the corpus
- Black Hole Mergers From Globular Clusters Observable by LISA I: Eccentric Sources Originating From Relativistic N-body Dynamics (2018, background): “…higher initial fGW with a peak between 10 0 − 101 Hz, and will therefore elude the LISA band and form directly in the proposed DECIGO (Kawamura et al. 2011; Isoyama et al. 2018)/Tian Qin (Luo et al. 2016) band before entering the LIGO band (e.g., Chen & Amaro-Seoane 2017; Samsing et al. 2018a).”
- Modeling Dense Star Clusters in the Milky Way and Beyond with the CMC Cluster Catalog (2019, background): “…and potentially distinguishable properties that should, in principle, be detectable as GW sources by LIGO/Virgo, as well as lower-frequency third-generation GW detectors such as LISA (Amaro-Seoane et al. 2017), DECIGO (Kawamura et al. 2011; Isoyama et al. 2018), and Tian Qin (Luo et al. 2016).”