Observing Gravitational Waves(GW) by LIGO

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Presentation transcript:

Observing Gravitational Waves(GW) by LIGO by Park young-ho

Mass with acceleration Emit gravitational wave & loss energy https://sillurian.tistory.com/117 Types of GW Continuous GW Compact binary inspiral GW Stochastic GW Burst GW

catastrophic events Sloshing of space-time Deformation of length at Earth Measuring fine change of length http://news.mit.edu/2019/lisa-barsotti-improved-ligo-gravitational-waves-0401 LIGO: Laser Interferometer Gravitational-Wave Observatory

Echo of light Echo of sound AFM: atomic force microscopy https://www.jagranjosh.com/general-knowledge/sound-doppler-effect-and-echo-1457694165-1 https://www.witec.de/techniques/afm/

Measuring Interference of light https://en.wikipedia.org/wiki/Wave_interference Measuring Interference of light https://www.mpoweruk.com/figs/Michelson-Interferometer.htm

Michelson Interferometer ≈ LIGO https://www.ligo.caltech.edu/WA/page/ligo-gw-interferometer https://www.ligo.caltech.edu/page/ligos-ifo https://www.youtube.com/watch?v=I7mMxITwIGY

Passive Damping: holds mirrors through a “quad” Seismic Isolation Active damping: sensing ground movements and performing counter movements Passive Damping: holds mirrors through a “quad” https://www.ligo.caltech.edu/page/ligo-technology

Understanding cosmology, uranology and astronomy Observing GW GW telescope Signal: Intensity, Direction, and shape !!! Deducing and Interpret events in universe! http://scienceon.hani.co.kr/365375

https://www.ligo.caltech.edu/