Scientists searching for gravitational waves have confirmed yet another detection from their fruitful observing run earlier this year. Dubbed GW170608, the latest discovery was produced by the merger of two relatively light black holes, 7 and 12 times the mass of the sun, at a distance of about a billion light-years from Earth. The merger left behind a final black hole 18 times the mass of the sun, meaning that energy equivalent to about 1 solar mass was emitted as gravitational waves during the collision.
GW170608 is the lightest black hole binary that LIGO and Virgo have observed – and so is one of the first cases where black holes detected through gravitational waves have masses similar to black holes detected indirectly via electromagnetic radiation, such as X-rays.
Read our media announcement here, or watch the OzGrav Director Professor Matthew Bailes explain the discovery:
Australian scientists to discuss new developments in gravitational-wave astronomy
NEWS BRIEFING: Tue 17 Oct 2017 at 09:00 AEDT at Old Parliament House, Canberra and online
Scientists from OzGrav (The ARC Centre of Excellence for Gravitational Wave Discovery), CAASTRO (The ARC Centre of Excellence for All-sky Astrophysics) and the LIGO-Virgo Collaboration will reveal new details and discoveries made in the ongoing search for gravitational waves.
Join us for this media briefing, moderated by Australia's Chief Scientist Dr Alan Finkel, when Australian experts will discuss the research and its implications.
OzGrav congratulates the winners of the Nobel Prize in Physics for their roles in discovering gravitational waves
The Australian Research Council Centre of Excellence for Gravitational Wave Discovery (OzGrav) is delighted to congratulate the winners of this year’s Nobel prize in Physics for the leadership roles they played in the discovery of gravitational waves by the Advanced LIGO detector.
The three winners are Rainer Weiss, from the Massachusetts Institute of Technology, Kip Thorne and Barry Barish, both of whom are from the California Institute of Technology. OzGrav is very fortunate to have Barry Barish serve on our Scientific Advisory Committee.
Australia’s Minister for Education and Training, Simon Birmingham, also congratulated the 2017 Nobel Prize winners. “OzGrav is helping Australia stay at the cutting edge of this new and rapidly advancing field,” said Senator Birmingham. “It will capitalise on the first detections of gravitational waves, to understand the extreme physics of black holes and warped space-time.”
The LIGO Scientific Collaboration and the Virgo collaboration report the first joint detection of gravitational waves with both the LIGO and Virgo detectors. This is the fourth announced detection of a binary black hole system and the first significant gravitational-wave signal recorded by the Virgo detector, and highlights the scientific potential of a three-detector network of gravitational-wave detectors.
The three-detector observation was made on August 14, 2017 at 10:30:43 UTC. The two Laser Interferometer Gravitational-Wave Observatory (LIGO) detectors, located in Livingston, Louisiana, and Hanford, Washington, and funded by the National Science Foundation (NSF), and the Virgo detector, located near Pisa, Italy, detected a transient gravitational-wave signal produced by the coalescence of two stellar mass black holes.
A paper about the event, known as GW170814, has been accepted for publication in the journal Physical Review Letters.
OzGrav headquarters is pleased to call for applications for the following two travel funding programs.
Applications for both programs closed Friday 22nd September 2017.
International Visitor Funding Program
The OzGrav International Visitor Program has been established to support travel by leading international scientists to collaborate on OzGrav projects with OzGrav CIs and other members within Australia. This is a competitive funding program, with potential visitors to be nominated by OzGrav CIs. Visitors will be encouraged to visit multiple nodes, participate in node and theme meetings, and give seminars or public talks during their visit. At least one third of the budget should come from the hosting or sponsoring node(s).
Further details, guidelines, and application instructions are contained in the international visitor funding application form.
Student/Postdoc Travel or Placement Awards
We are inviting applications from OzGrav students and postdocs for travel awards to enable them to spend time working at other nodes or collaborating organizations on OzGrav projects, and/or to attend national or international conferences to communicate OzGrav research. This is a competitive funding program. Successful applicants may be awarded up to $3,000 for international placements/travel or up to $2,000 for domestic placements/travel. At least one third of the budget should come from the applicant’s home or host institution.
Further details, guidelines, and application instructions are contained in the student/postdoc travel award application form.
The Laser Interferometer Gravitational-wave Observatory (LIGO) has made a third detection of gravitational waves, ripples in space and time, demonstrating that a new window in astronomy has been firmly opened.
As was the case with the first two detections, the waves were generated when two black holes merged to form a larger black hole. In the latest merger, the final black hole was some 50 times the mass of our Sun. The recent detection, called GW170104, is the farthest yet, with the black holes located about three billion light-years away.
Einstein's theory of general relativity predicts that colliding black holes and neutron stars generate ‘gravitational waves’ that cause ripples in the fabric of space-time. After such an event, space-time does not return to its original state, instead it stays permanently warped. The astonishing prediction of Monash University researchers (and OzGrav investigators) Eric Thrane and Paul Lasky, along with student Lucy McNeill is that this warping could be detected using the advanced LIGO detector - even when the signal that caused the warping was not observed.
More details in the Press Release, New Scientist article, and the full publication.
OzGrav researchers describe how Einstein’s ‘spooky’ entanglement could help detect gravitational waves
OzGrav researcher David Blair (UWA) writes in The Conversation about a paper in Nature magazine co-authored by fellow OzGrav researcher Chunnong Zhao (UWA). Zhao and colleagues have created an exciting new design that makes use of quantum entanglement to make more sensitive gravitational wave detectors.
Congratulations to OzGrav Program Leader Prof Susan Scott (ANU) who was selected to participate in the Homeward Board program, a groundbreaking leadership, strategic and science initiative for women, set against the backdrop of Antarctica. The initiative, turned global movement, aims to heighten the influence and impact of women with a science background in order to influence policy and decision making as it shapes our planet, within 10 years.
Prof Scott will undertake a year-long program to develop leadership and strategic capabilities, including an Antarctic expedition in February 2018. We will be following her journey over the next year here at ozgrav.org! Listen to Susan Scott speak about the program and how she is preparing for the journey with this 2CC radio podcast.