Catching Gravitational Waves - With Sheila Rowan

Explore the fascinating world of gravitational waves in this comprehensive lecture by Professor Sheila Rowan. Delve into Einstein's General Theory of Relativity and understand how these ripples in space-time are produced by some of the most energetic phenomena in the universe, including black holes, neutron stars, and supernovae. Learn about the groundbreaking detection of gravitational waves by the Laser Interferometer Gravitational-wave Observatory (LIGO) and its implications for the future of astronomy. Discover the nature of gravitational waves, their sources, detection methods, and the potential impact on our understanding of the universe. Gain insights into ultra-sensitive mechanical systems, materials with ultra-low mechanical loss, and the construction of mechanically-stable optical systems for interferometric applications. Examine the gravitational wave spectrum, properties of black holes, and the concept of strain in space. Explore the LIGO observatories, advanced detector networks, and the process of generating and distributing prompt alerts. Investigate the prospects for future observing runs, science questions to be answered, and the global network of gravitational wave facilities. Conclude with a discussion on the composition of the universe and the matter we understand.

Intro
Fundamentals
Gravity: the death of stars
Gravitational Waves' possible sources
THE GRAVITATIONAL WAVE SPECTRUM
Properties of the final black hole
Gravitational Waves : A Strain in Space
How can we detect them?
Michelson Interferometer
Addition of Light Waves (Interference)
Main limitations to sensitivity
LIGO Observatories
Initial LIGO detectors
Advanced GW Detector Network
Generating and Distributing Prompt Alerts
GW150914 Sky Location estimate
Prospects for next observing runs
Science questions to be answered
Sky localisation with 3 detector sites
LIGO Liftoff of Vega VV06 carrying LISA Pathfinder
The Network of Gravitational Wave Facilities
How much of the Universe is made of matter we understand