16.10.17 - Discovery marks first cosmic event observed in both gravitational waves and light.
For the first time, scientists have directly detected gravitational waves — ripples in space and time — in addition to light from the spectacular collision of two neutron stars. This marks the first time that a cosmic event has been viewed in both gravitational waves and light.
The discovery was made using the U.S.-based Laser Interferometer Gravitational-Wave Observatory (LIGO); the Europe-based Virgo detector; and some 70 ground- and space-based observatories. Read more
- Fact sheet
- GW170817 detection webpage
- Articles related to GW170817
- LIGO-Virgo collaboration press release
Virgo-Polgraw is a Polish team of researchers analyzing the data collected by the LIGO and Virgo detectors in search for gravitational waves predicted by the general theory of relativity by Albert Einstein.
Gravitational waves astrophysics is a new and promising field of research of the Universe. In contrast to the observations of the electromagnetic waves (radio waves, visible light, X-rays and gamma), which are the main source of our current knowledge, we ''listen'' to the Universe by registering minor disturbances of the space-time curvature using the LIGO and Virgo laser interferometric detectors. Gravitational waves are emitted during the largest cosmic cataclysms: mergers of binary systems of neutron stars or black holes, explosions of supernovae, and by other sources, eg. unstable or deformed rotating neutron stars. The direct detection of gravitational waves allows the study of objects that are dark (do not shine in electromagnetic waves), testing the theory of gravity in the dynamic regime of strong gravitational field, and the direct study of the interior of neutron stars which contain the densest and most extreme matter existing currently in the Universe. These informations cannot be currently obtained using other methods.
In addition to the data analysis and the development of the statistical signal detection theory, we modeling astrophysical sources of gravitational waves, make predictions about the population of these sources, search for the electromagnetic waves emission accompanying the gravitational waves and take part in the construction of the Virgo interferometer.
The leader of the Virgo-Polgraw group is prof. Andrzej Królak from the Mathematical Institute PAS. The project is currently financed by an NCN Harmonia grant ,,Udział Polski w projekcie Advanced Virgo'' UMO-2014/14/M/ST9/00707). Polish participation in the Virgo project is on the Polish Roadmap for Research Infrastructure. The group consists of
- Institute of Mathematics, PAS
- Nicolaus Copernicus Astronomical Center, PAS
- Warsaw University Astronomical Observatory
- Tomasz Bulik (firstname.lastname@example.org)
- Institute of Astronomy, University of Zielona Góra
- Department of Physics, University of Bialystok
- National Centre for Nuclear Research
- Adam Zadrożny
- Orest Dorosh
- Adam Kutynia
- Centre for Astronomy, Nicolaus Copernicus University in Toruń
- Kazimierz Borkowski
- Institute of Theoretical Physics, University of Wrocław
- Arkadiusz Błaut
- Astronomical Observatory of the Jagiellonian University
- Andrzej Kułak
- Michał Ostrowski
Financing sponsors and sources of computing grants.
Member of the Virgo-Polgraw group: Paweł Ciecieląg, Magdalena Sieniawska, Orest Dorosh, Izabela Kowalska-Leszczyńska, Dorota Rosińska, Adam Zadrożny, Michał Bejger, Andrzej Królak, Piotr Jaranowski, Tomasz Bulik.
Countries and institutions participating in the Advanced Virgo project (Nicolas Arnaud/Virgo Outreach team)
Members of the LIGO-Virgo Collaboration Meeting, organized in Kraków, September 2010.