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Title
Search for sub-solar mass ultracompact binaries in Advanced LIGO's first observing run
Author(s)
B.P. Abbott et al.강궁원배상욱
Publication Year
2018-12-07
Abstract
We present the first Advanced LIGO and Advanced Virgo search for ultracompact binary systems with
component masses between 0.2 M⊙–1.0 M⊙ using data taken between September 12, 2015 and January
19, 2016.We find no viable gravitational wave candidates. Our null result constrains the coalescence rate of
monochromatic (delta function) distributions of nonspinning (0.2 M⊙, 0.2 M⊙) ultracompact binaries to be
less than 1.0 × 106 Gpc−3 yr−1 and the coalescence rate of a similar distribution of (1.0 M⊙, 1.0 M⊙)
ultracompact binaries to be less than 1.9 × 104 Gpc−3 yr−1 (at 90% confidence). Neither black holes nor
neutron stars are expected to form below ∼1 M⊙ through conventional stellar evolution, though it has been
proposed that similarly low mass black holes could be formed primordially through density fluctuations in
the early Universe and contribute to the dark matter density. The interpretation of our constraints in the
primordial black hole dark matter paradigm is highly model dependent; however, under a particular
primordial black hole binary formation scenario we constrain monochromatic primordial black hole
populations of 0.2 M⊙ to be less than 33% of the total dark matter density and monochromatic populations
of 1.0 M⊙ to be less than 5% of the dark matter density. The latter strengthens the presently placed bounds
from microlensing surveys of massive compact halo objects (MACHOs) provided by the MACHO and
EROS Collaborations.
Keyword
Ultracompact Binaries; LIGO’s O1
Journal Title
PHYSICAL REVIEW LETTERS
Citation Volume
121
ISSN
0031-9007
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Appears in Collections:
7. KISTI 연구성과 > 학술지 발표논문
URI
https://repository.kisti.re.kr/handle/10580/14781
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