New Gravitational Waves Detected From Four More Black Hole Mergers. Total Detections up to 11 Now

Universe Today | 2/11/2016 | Staff
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On February 11th, 2016, scientists at the Laser Interferometer Gravitational-wave Observatory (LIGO) made history when they announced the first-ever detection of gravitational waves (GWs). Since that time, multiple detections have taken place and scientific collaborations between observatories – like Advanced LIGO and Advanced Virgo – are allowing for unprecedented levels of sensitivity and data sharing.

Previously, seven such events had been confirmed, six of which were caused by the mergers of binary black holes (BBH) and one by the merger of a binary neutron star. But on Saturday, Dec. 1st, a team of scientists the LIGO Scientific Collaboration (LSC) and Virgo Collaboration presented new results that indicated the discovery of four more gravitational wave events. This brings the total number of GW events detected in the last three years to eleven.The presentation, titled “Binary Black Hole Population Properties Inferred from the First and Second Observing Runs of Advanced LIGO and Advanced Virgo“, was made during the 2018 Gravitational Wave Physics and Astronomy Workshop (GWPAW) – which took place from Dec. 1st to Dec. 4th at the University of Maryland.

Joint - Space-Science - Institute - JSI - Partnership

Hosted by the Joint Space-Science Institute (JSI), a partnership between the University of Maryland and NASA’s Goddard Space Flight Center, this annual event brings scientists and researchers from all around the world together to discuss current and future issues related to the detection and study of gravitational waves.

In the course of the presentation, Michael Pürrer – a senior scientist in the Astrophysical and Cosmological Relativity division at AEI Potsdam – presented the results of the first catalog at GWPAW on Saturday on behalf of the LIGO Scientific Collaboration and Virgo Collaboration. These included the seven previously detected events and the four recent detections. As he stated during the presentation:

Catalog - Analysis - Detections

“In this catalog we present a thorough analysis of all 11 gravitational-wave detections found in...
(Excerpt) Read more at: Universe Today
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