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pacome delva

New pulsars could net gravitational waves - 0 views

physicsworld.com/...41364

phy pulsars gravitational_waves

shared by pacome delva on 11 Jan 10 - Cached
  • One of the physicists working on interferometers, Jim Hough of the University of Glasgow, agrees that pulsar timing is a good way to search for gravity waves at extremely low frequencies. He believes that if astronomers observe 20 pulsars with a timing precision of better than 100 nanoseconds for five years then they would "have a very good possibility of observing gravitational-wave signals."
  • pacome delva on 11 Jan 10
     
    Again an article about the gravitational waves detected with pulsars. However its a bit fast conclusion, cause i don't know any serious article that draw this conclusion for sure...
Ma Ru

Here come gravitational waves - 3 views

www.nature.com/...of-gravitational-waves-1.14876

science PHY gravitational waves Lisa Nature

shared by Ma Ru on 17 Mar 14 - No Cached
  • Ma Ru on 17 Mar 14
     
    Here you go. You can now scrap Lisa altogether. Who's going to tell Pacome?
  • Thijs Versloot on 18 Mar 14
     
    Awesome and exciting stuff indeed! The data pinpoint the time when inflation occurred - about 10E-37 seconds into the Universe's life - and its temperature at the time, corresponding to energies of about 10E16 gigaelectronvolts, says cosmologist Michael Turner of the University of Chicago. That is the same energy at which three of the four fundamental forces of nature - the weak, strong and electromagnetic force - are expected to become indistinguishable from one another in a model known as the grand unified theory. I expect more fundamental physics insights to come out of this in the future. A full-sky survey from space may still be an interesting addition to the measurement capabilities, so I would not rule out LISA all together I guess...
Paul N

Gravitational wave discovery kills 90% of physics theories - 0 views

www.nature.com/...ng-cleaning-in-physics-1.14910

PHY fun

shared by Paul N on 24 Mar 14 - No Cached
  • Paul N on 24 Mar 14
     
    "The BICEP2 data would eliminate about 90% of inflationary models, Andrei Linde, a cosmologist at Stanford University in California, told a packed auditorium at MIT the day after the BICEP2 announcement (see picture below). Many of those models do not produce gravitational waves at detectable levels, said Linde, who is one of the founders of inflation theory." Is there any hope for LISA now?
  • annaheffernan on 26 Mar 14
     
    Of course - the data is more proof that GWs exist!!
  • LeopoldS on 27 Mar 14
     
    so you don't expect any impact on the science objectives of Lisa at all?
jcunha

Is the gravitational-wave ringdown a probe of the event horizon? - 1 views

arxiv.org/1602.07309

gravitational waves PHY space wormhole gravaster

shared by jcunha on 03 May 16 - No Cached
  • jcunha on 03 May 16
     
    This simulation showx that the signal measured in LIGO could come from a gravaster (objects which are believed to have their insides made of dark energy) or even a wormhole as sources of gravitacional waves. Published in PRL by friends of Jai
ESA ACT

Star crust is 10 billion times stronger than steel - space - 14 April ... - 0 views

www.newscientist.com/...times-stronger-than-steel.html

PHY physics gravity space stars waves

shared by ESA ACT on 24 Apr 09 - Cached
  • ESA ACT on 24 Apr 09
     
    On detection of gravitational waves - with dedication to Pacome...
Ma Ru

Detecting gravitational waves by timing pulsars - 1 views

www.newscientist.com/...ks-relativitys-final-test.html

phy pulsars gravitational waves science

shared by Ma Ru on 18 Mar 10 - Cached
  • Ma Ru on 18 Mar 10
     
    Undoubtedly something for Pacome...
pacome delva

Penrose claims to have glimpsed universe before Big Bang - 0 views

physicsworld.com/...44388

phy cosmology

shared by pacome delva on 22 Nov 10 - No Cached
LeopoldS liked it
  • According to Penrose and Gurzadyan, these circles allow us to "see through" the Big Bang into the aeon that would have existed beforehand. The circles, they say, are the marks left in our aeon by the spherical ripples of gravitational waves that were generated when black holes collided in the previous aeon.
  • Julian Barbour, a visiting professor of physics at the University of Oxford, says that these circles would be "remarkable if real and sensational if they confirm Penrose's theory". They would, he says, "overthrow the standard inflationary picture", which, he adds, has become widely accepted as scientific fact by many cosmologists. But he believes that the result will be "very controversial" and that other researchers will look at the data very critically. He says there are many disputable aspects to the theory
  • pacome delva on 22 Nov 10
     
    hehe, a nice controversy? or completely overinterpreted results...?
  • LeopoldS on 23 Nov 10
     
    what the heck is this? sounds strange to me ... would I understand the original paper?
Nina Nadine Ridder

Gravitational waves from black holes detected - BBC News - 1 views

www.bbc.com/...science-environment-35524440

PHY space science

shared by Nina Nadine Ridder on 11 Feb 16 - No Cached
  • Nina Nadine Ridder on 11 Feb 16
     
    From the section Science & Environment Scientists are claiming a stunning discovery in their quest to fully understand gravity. They have observed the warping of space-time generated by the collision of two black holes more than a billion light-years from Earth.
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