Twitter reports that Gravitational Waves have been found and LIGO Observatory researchers are writing a paper

Lawrence Krauss, a cosmologist at Arizona State university, tweeted that he had received independent confirmation of a rumour that has been in circulation for months, adding: “Gravitational waves may have been discovered!!”

The excitement centers on a longstanding experiment known as the Advanced Laser Interferometer Gravitational-Wave Observatory (Ligo) which uses detectors in Hanford, Washington, and Livingston, Louisiana to look for ripples in the fabric of spacetime.

According to the rumors, scientists on the team are in the process of writing up a paper that describes a gravitational wave signal. If such a signal exists and is verified, it would confirm one of the most dramatic predictions of Albert Einstein’s century-old theory of general relativity.

Krauss said he was 60% confident that the rumor was true, but said he would have to see the scientists’ data before drawing any conclusions about whether the signal was real or not. Researchers on a large collaboration like Ligo will have any such paper internally vetted before sending it for publication and calling a press conference.

So this is pre-buzz for a researcher paper which may not be any good or conclusive

Einstein predicted that the waves would be produced in extremely violent events, such as collisions between two black holes. As gravitational waves spread out, they compress and stretch spacetime. The ripples could potentially be picked up by laser beams that measure minute changes in the lengths of two 4km-long pipes at the Ligo facilities.

Gabriela Gonzalez, professor of physics and astronomy at Louisiana State University, and the spokesperson for the LIGO collaboration, told the Guardian: “The LIGO instruments are still taking data today, and it takes us time to analyse, interpret and review results, so we don’t have any results to share yet.

Physicist working with LIGO looked for them from 2002 to 2010, with the initial incarnation of the observatory, which consists of two gargantuan L-shaped optical instruments in Hanford, Washington, and Livingston, Louisiana. To detect the stretching of space itself, researchers compare the lengths of an interferometer’s two 4-kilometer-long arms to within a billionth the width of an atom.

From 2010 to 2015, LIGO researchers completely rebuilt their instruments, aiming to make them up to 10 times more sensitive. They resumed their hunt for a fleeting source of gravitational waves on 18 September 2015. Then the rumor mill revved up.

By mid-September 2016 "the world’s largest gravitational-wave facility" would have completed a 5-year US$200-million overhaul and a would have a total cost of $620 million. LIGO is the largest and most ambitious project ever funded by the NSF.

Its sensitivity will be further enhanced until it reaches design sensitivity around 2021

Read more »

from Next Big Future http://ift.tt/1SOCe64
via IFTTT

Leave a comment