Black hole mergers from globular clusters observable by LISA I: Eccentric sources originating from relativistic n-body dynamics
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Black hole mergers from globular clusters observable by LISA I : Eccentric sources originating from relativistic n-body dynamics. / Samsing, Johan; D'Orazio, Daniel J.
I: Monthly Notices of the Royal Astronomical Society, Bind 481, Nr. 4, 01.12.2018, s. 5445-5450.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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TY - JOUR
T1 - Black hole mergers from globular clusters observable by LISA I
T2 - Eccentric sources originating from relativistic n-body dynamics
AU - Samsing, Johan
AU - D'Orazio, Daniel J.
PY - 2018/12/1
Y1 - 2018/12/1
N2 - We show that nearly half of all binary black hole (BBH) mergers dynamically assembled in globular clusters have measurable eccentricities (e > 0.01) in the LISA band (10-2 Hz), when General Relativistic corrections are properly included in the N-body evolution. If only Newtonian gravity is included, the derived fraction of eccentric LISA sources is significantly lower, which explains why recent studies all have greatly underestimated this fraction. Our findings have major implications for how to observationally distinguish between BBH formation channels using eccentricity with LISA, which is one of the key science goals of the mission. We illustrate that the relatively large population of eccentric LISA sources reported here originates from BBHs that merge between hardening binary-single interactions inside their globular cluster. These results indicate a bright future for using LISA to probe the origin of BBH mergers.
AB - We show that nearly half of all binary black hole (BBH) mergers dynamically assembled in globular clusters have measurable eccentricities (e > 0.01) in the LISA band (10-2 Hz), when General Relativistic corrections are properly included in the N-body evolution. If only Newtonian gravity is included, the derived fraction of eccentric LISA sources is significantly lower, which explains why recent studies all have greatly underestimated this fraction. Our findings have major implications for how to observationally distinguish between BBH formation channels using eccentricity with LISA, which is one of the key science goals of the mission. We illustrate that the relatively large population of eccentric LISA sources reported here originates from BBHs that merge between hardening binary-single interactions inside their globular cluster. These results indicate a bright future for using LISA to probe the origin of BBH mergers.
KW - Globular clusters: general
KW - Gravitation
KW - Gravitational waves
KW - Stars: kinematics and dynamics
UR - http://www.scopus.com/inward/record.url?scp=85056817437&partnerID=8YFLogxK
U2 - 10.1093/MNRAS/STY2334
DO - 10.1093/MNRAS/STY2334
M3 - Journal article
AN - SCOPUS:85056817437
VL - 481
SP - 5445
EP - 5450
JO - Royal Astronomical Society. Monthly Notices
JF - Royal Astronomical Society. Monthly Notices
SN - 0035-8711
IS - 4
ER -
ID: 236271455