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Gravitational Waves: A New Astronomy
Published on Sep 20, 20164731 Views
Ripples in the curvature of space-time – "gravitational waves" – are produced by some of the most energetic and dramatic phenomena in our universe, including black holes, neutron stars and supernovae.
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Chapter list
Gravitational waves: A new astronomy00:00
Fundamentals02:36
Gravity05:58
Gravitation06:57
Gravitational waves - a prediction of General Relativity (1916)08:55
Matter curves space-time. Space-time guides motion of matter.10:47
‘Gravitational Waves – the experimentalist’s view’11:42
Gravity : the death of stars12:54
‘Gravitational Waves’- possible sources - 115:40
‘Gravitational Waves’- possible sources - 217:40
‘Gravitational Waves’- possible sources - 318:36
‘Gravitational Waves’- possible sources - 419:39
The gravitational Wave Spectrum20:19
Listening for Merging Binary Black Holes 21:41
With two ‘detectors’ the LIGO and Virgo collaborations found such a signal a year ago today! – reported in Feb 201623:11
What was it we saw ?24:30
The paper - published Thursday Feb 11th in Physical Review Letters26:35
Properties of the final black hole26:46
LIGO's first observing run28:02
Comparison of the three signals28:47
Black Holes of Known Mass29:27
Gravitational Waves : A Strain in Space31:02
The Effect of Gravitational Waves31:53
How can we detect them?32:54
Michelson Interferometer33:54
Addition of Light Waves (Interference)34:34
Main limitations to sensitivity35:44
LIGO Observatories - 137:25
LIGO Observatories - 238:05
Initial LIGO detectors38:19
Additional challenges…39:29
Advanced GW Detector Network41:35
Rapid Source sky-localisation42:38
Generating and Distributing Prompt Alerts43:48
GW150914 Sky Location estimate - 144:17
GW150914 Sky Location estimate - 244:40
Sky Locations of Gravitational-wave Events GW150914, GW151226 and Candidate LVT151012 (our signals so far)45:20
Simulated Sky Locations of O1 Events and Candidate Including the Virgo Interferometer 45:32
Next steps45:45
Science questions to be answered47:05
Science questions to be answered47:57
Gravitational wave detector network ~202048:06
The era of gravitational wave astronomy is here!48:11
Wave spectrum - 148:26
Wave spectrum - 248:43
Wave spectrum - 348:53
eLISA50:14
The Network of Gravitational Wave Facilities50:25
How much of the Universe is made of matter we understand?51:15
Gravitational Waves? - 152:08
Gravitational Waves? - 252:12