gw150914: ligo's first observation of gravitational waves ... · and merger of a pair of black...

Dipartimento di Fisica e Scienza della Terra SEMINARIO DI DIPARTIMENTO GW150914: LIGO's First Observation of Gravitational Waves from a Binary Black Hole Merger Michele Vallisneri Jet Propulsion Lab, California Institute of Technology, Pasadena Abstract: On September 14, 2015, the two LIGO detectors simultaneously observed a transient gravitational-wave signal, which was named GW150914. The signal matched the waveform predicted by general relativity for the inspiral and merger of a pair of black holes and the ringdown of the merged remnant black hole. This was the first direct detection of gravitational waves and the first observation of a binary black hole merger. I describe the mechanics of the detection, its astrophysical implications, and the tests of general relativity that can be performed with the signal. I also discuss results from the entirety of Advanced LIGO’s first observing run. Giovedì 23 giugno – ore 16.30 Aula Newton – Plesso Fisico

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Page 1: GW150914: LIGO's First Observation of Gravitational Waves ... · and merger of a pair of black holes and the ringdown of the merged remnant black hole. This was the first direct detection

Dipartimento di Fisica e Scienza della Terra

SEMINARIO DI DIPARTIMENTO

GW150914: LIGO's First Observation of Gravitational Waves from a Binary Black Hole Merger

Michele Vallisneri

Jet Propulsion Lab, California Institute of Technology, Pasadena Abstract: On September 14, 2015, the two LIGO detectors simultaneously observed a transient gravitational-wave signal, which was named GW150914. The signal matched the waveform predicted by general relativity for the inspiral and merger of a pair of black holes and the ringdown of the merged remnant black hole. This was the first direct detection of gravitational waves and the first observation of a binary black hole merger. I describe the mechanics of the detection, its astrophysical implications, and the tests of general relativity that can be performed with the signal. I also discuss results from the entirety of Advanced LIGO’s first observing run.

Giovedì 23 giugno – ore 16.30 Aula Newton – Plesso Fisico

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