[Fis] Shouldn't we talk in FIS about LIGO and Gravitational Waves experimental measures and informational consequences?

[Bob Logan]

Hi Moises and FIS colleagues. The gravity wave that was detected last Sept informed us of the event of two black holes colliding 1.3 billion years ago - we learned how much energy was released which was approximately the 3 times the mass of the sum times c squared. We also learned that the event was very short but that the power (Energy/time) of the event was 50 times the power of all the star in the universe. Gravity waves can only provide info for large accelerations of mass because the gravitational force is so weak. So it can not be used to send info from Earth based agents to each other. My advice is stick to E&M radiation. :-) Bob


______________________

Robert K. Logan
Prof. Emeritus - Physics - U. of Toronto 
Fellow University of St. Michael's College
Chief Scientist - sLab at OCAD
http://utoronto.academia.edu/RobertKLogan
www.physics.utoronto.ca/Members/logan
www.researchgate.net/profile/Robert_Logan5/publications










> On Feb 12, 2016, at 6:34 PM, Moisés André Nisenbaum <moises.nisenbaum at ifrj.edu.br> wrote:
> 
> Dear FISers.
> 
> Yesterday LIGO ( Laser Interferometer Gravitational-Wave Observatory) announced, for the first time, the detection of Gravitational Waves predicted by Einstein 100 years ago.
> Wouldn't be Gravitational Waves a good discussion in FIS?
> We all know that regular waves can carry information. Can gravitational waves carry  information? Which kind?
> Panelists (I saw some videos) say that "gravitational waves carry information about astronomical phenomena never before observed by human".
> The question is: is it possible to "modulate" some information in gravitational waves?
> I found at Scopus 17 articles containing "information" and "gravitational waves" in title, so I think that people are working around this...
> I think that it is a very important moment in history of science and it is extremely related with 'information'.
> 
> Surely we  have colleagues (specialists) in FIS that can share interesting thoughts about this theme.
> I talked with Pedro about, and he agree we may have a discussion about after two that are scheduled.
> So, this message is not for starting a discussion. It is only to register this fabulous new way that, we have now, to 'listen' the universe.
> 
> Links:
> http://www.ligo.org/news/media-advisory.php <http://www.ligo.org/news/media-advisory.php>
> https://ligo.caltech.edu/ <https://ligo.caltech.edu/>
> https://www.advancedligo.mit.edu/ <https://www.advancedligo.mit.edu/>
> http://www.ligo.org/ <http://www.ligo.org/>
> https://www.ligo.org/partners.php <https://www.ligo.org/partners.php>
> 
> Um abraço!
> Moisés
> 
> -- 
> Moisés André Nisenbaum
> Doutorando IBICT/UFRJ. Professor. Msc.
> Instituto Federal do Rio de Janeiro - IFRJ
> Campus Rio de Janeiro
> moises.nisenbaum at ifrj.edu.br <mailto:moises.nisenbaum at ifrj.edu.br>_______________________________________________
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