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신창섭
순수물리이론 연구단
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Gravitational-Wave Fringes at LIGO: Detecting Compact Dark Matter by Gravitational Lensing

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Title
Gravitational-Wave Fringes at LIGO: Detecting Compact Dark Matter by Gravitational Lensing
Author(s)
Sunghoon Jung; Chang Sub Shin
Publication Date
2019-01
Journal
PHYSICAL REVIEW LETTERS, v.122, no.4, pp.041103 -
Publisher
AMER PHYSICAL SOC
Abstract
© 2019 American Physical Society. Utilizing gravitational-wave (GW) lensing opens a new way to understand the small-scale structure of the Universe. We show that, in spite of its coarse angular resolution and short duration of observation, LIGO can detect the GW lensing induced by small structures, in particular by compact dark matter (DM) or the primordial black hole of 10-10(5) M-circle dot, which remains an interesting DM candidate. The lensing is detected through GW frequency chirping, creating the natural and rapid change of lensing patterns: frequency-dependent amplification and modulation of GW waveforms. As a highest-frequency GW detector, LIGO is a unique GW lab to probe such light compact DM. With the design sensitivity of Advanced LIGO, one-year observation by three detectors can optimistically constrain the compact DM density fraction f(DM) to the level of a few percent.
URI
https://pr.ibs.re.kr/handle/8788114/5907
ISSN
0031-9007
Appears in Collections:
Center for Fundamental Theory(순수물리이론 연구단) > Journal Papers (저널논문)
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