Author Topic: Gravitational Waves Have Been Detected At LIGO  (Read 35387 times)

Online eeergo

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Re: Gravitational Waves Have Been Detected At LIGO
« Reply #160 on: 02/28/2017 03:09 PM »
aVIRGO has been inaugurated today:

http://home.infn.it/it/comunicazione/comunicati-stampa/2193-taglio-del-nastro-per-advanced-virgo (still in Italian)

Construction and commissioning are complete with this ceremony, but calibration is still up for the next few months. The project has cost 23.8 M€ spread over the last 4 years. Upgrades include modifications in the optics, with heavier and higher-performing mirrors; new and more powerful electronics, new aberration-compensating system, better seismic isolation, stray light reduction system and better vacuum.

4-page interview with Giovanni Losurdo, coordinator of aVIRGO:

http://home.infn.it/newsletter-eu/pdf/NEWSLETTER_INFN_32_inglese_pag6.pdf


Extremely interesting to note that the "monolithic suspensions" (fused silica fibers where the mirrors are suspended) were in use by VIRGO before, but were damaged because of dust particles impacting them when the mirror assembly was vented to atmospheric pressure (!!!). Steel wires will be used for the commissioning and first science runs, to then re-install the silica fibers to much increase sensitivity in the low-frequency range from run 03[/size][size=78%].[/size]
« Last Edit: 02/28/2017 03:19 PM by eeergo »
-DaviD-

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Re: Gravitational Waves Have Been Detected At LIGO
« Reply #161 on: 03/08/2017 05:55 PM »
Now this is quite unfortunate.

Gravitational wave pioneer Ronald Drever dies

I'm attempting to see if an award may be made posthumously if the person was nominated before death, but it's not clear. If the person had already been awarded the prize, but died before reception, then they will still receive it, but prize announcements for 2017 won't be until October-ish. I do hope the committee rules on the lighter side of this gray area.  Looking for precedents at the moment

Regardless, the man saw his life's work validated in a spectacular fashion. I hope he died with a smile on his face.

 

Offline as58

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Re: Gravitational Waves Have Been Detected At LIGO
« Reply #162 on: 03/09/2017 05:23 PM »
Now this is quite unfortunate.

Gravitational wave pioneer Ronald Drever dies

I'm attempting to see if an award may be made posthumously if the person was nominated before death, but it's not clear. If the person had already been awarded the prize, but died before reception, then they will still receive it, but prize announcements for 2017 won't be until October-ish. I do hope the committee rules on the lighter side of this gray area.  Looking for precedents at the moment

Regardless, the man saw his life's work validated in a spectacular fashion. I hope he died with a smile on his face.

Unfortunately, the rules are clear. From http://www.nobelprize.org/nobel_organizations/nobelfoundation/statutes.html#par4:

Quote
Work produced by a person since deceased shall not be considered for an award. If, however, a prizewinner dies before he has received the prize, then the prize may be presented.

In 2011 they did award Ralph Steinman the Prize for Physiology or Medicine posthumously, but in that case the committee wasn't aware that he had died only four days earlier.

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Re: Gravitational Waves Have Been Detected At LIGO
« Reply #163 on: 05/17/2017 07:59 PM »
Physicists use Einstein’s ‘spooky’ entanglement to invent super-sensitive gravitational wave detector

Quote
The first direct detection of gravitational waves, a phenomenon predicted by Einstein’s 1915 general theory of relativity, was reported by scientists in 2016.

Armed with this “discovery of the century”, physicists around the world have been planning new and better detectors of gravitational waves.

Physicist Professor Chunnong Zhao and his recent PhD students Haixing Miao and Yiqiu Ma are members of an international team that has created a particularly exciting new design for gravitational wave detectors.

The new design is a real breakthrough because it can measure signals below a limit that was previously believed to be an insurmountable barrier. Physicists call this limit the standard quantum limit. It is set by the quantum uncertainty principle.

The new design, published in Nature magazine this week, shows that this may not be a barrier any longer.

Using this and other new approaches may allow scientists to monitor black hole collisions and “spacequakes” across the whole of the visible universe.

https://theconversation.com/physicists-use-einsteins-spooky-entanglement-to-invent-super-sensitive-gravitational-wave-detector-77822

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