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Gravitational WavesSupplement to Lecture XV
October 23, 2019
1
LIGO – Hanford Site (1 of 2)
2Caltech / MIT / LIGO Lab
3LIGO Scientific Collaboration (2014)
Advanced LIGOOptical Layout of the Interferometer
[Fabry-Perot Cavity]
4
5
6
GW 170817(LIGO + Virgo Collaborations 2017)
7
Sky localization
mT2/5µ3/5 =1.188
−0.002+0.004MSun
8
Gamma Ray BurstCoincident with GW Event
(LIGO, Virgo, Fermi-GBM, INTEGRAL Collaborations, 2017)
Multi-Wavelength Electromagnetic Observations of GW170817(Many Collaborations, 2017)
9Host galaxy is NGC 4993, z = 0.0097
H0 from 1 Gravitational Wave Source
10
Dire
ct m
easu
rem
ent
from
Cep
heid
s+ S
N Ia
Pred
ictio
n fr
om C
MB
+ L
CDM
Distance
–inclin
ation dege
neracy
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