Black hole mergers from globular clusters observable by LISA II. Resolved eccentric sources and the gravitational wave background
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Black hole mergers from globular clusters observable by LISA II. Resolved eccentric sources and the gravitational wave background. / D'Orazio, Daniel J.; Samsing, Johan.
In: Monthly Notices of the Royal Astronomical Society, Vol. 481, No. 4, 01.12.2018, p. 4775-4785.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - Black hole mergers from globular clusters observable by LISA II. Resolved eccentric sources and the gravitational wave background
AU - D'Orazio, Daniel J.
AU - Samsing, Johan
PY - 2018/12/1
Y1 - 2018/12/1
N2 - In Paper I of this series we showed that a large per centage of the binary black hole (BBH) mergers that form through dynamical interactions in globular clusters will have significant eccentricity in the ~10-3 to 10-1 Hz LISA band. In this work we quantify the evolution of these highly eccentric binaries through the LISA and LIGO bands, and compute the stochastic gravitational wave background from the merging, eccentric population.We find that the population of BBHs that merge in-between three-body encounters inside their cluster (~50 per cent of all cluster-formed BBH mergers) will have measurable eccentricity for their entire lifetime in the LISA band. The population of BBHs that merge during three-body encounters (~5 per cent of all cluster-formed BBH mergers) will be detectable by LIGO with eccentricities of e ~ 0.1. The gravitational wave background from dynamically assembled BBHs encodes a characteristic bump due to the high initial eccentricities of these systems. The location and amplitude of this bump depend on globular cluster properties.
AB - In Paper I of this series we showed that a large per centage of the binary black hole (BBH) mergers that form through dynamical interactions in globular clusters will have significant eccentricity in the ~10-3 to 10-1 Hz LISA band. In this work we quantify the evolution of these highly eccentric binaries through the LISA and LIGO bands, and compute the stochastic gravitational wave background from the merging, eccentric population.We find that the population of BBHs that merge in-between three-body encounters inside their cluster (~50 per cent of all cluster-formed BBH mergers) will have measurable eccentricity for their entire lifetime in the LISA band. The population of BBHs that merge during three-body encounters (~5 per cent of all cluster-formed BBH mergers) will be detectable by LIGO with eccentricities of e ~ 0.1. The gravitational wave background from dynamically assembled BBHs encodes a characteristic bump due to the high initial eccentricities of these systems. The location and amplitude of this bump depend on globular cluster properties.
KW - Galaxies: star clusters: general
KW - Gravitational waves
UR - http://www.scopus.com/inward/record.url?scp=85056830736&partnerID=8YFLogxK
U2 - 10.1093/MNRAS/STY2568
DO - 10.1093/MNRAS/STY2568
M3 - Journal article
AN - SCOPUS:85056830736
VL - 481
SP - 4775
EP - 4785
JO - Royal Astronomical Society. Monthly Notices
JF - Royal Astronomical Society. Monthly Notices
SN - 0035-8711
IS - 4
ER -
ID: 236271393