gammaray
Latest
Scientists more accurately gauge the brightness of the universe
You'd think that it would be virtually impossible to determine the collective brightness of the observable universe, but a team of scientists has come surprisingly close. They've completed the most accurate measurement of the universe's light to date using both reams of Fermi Space Telescope gamma ray data and some unusual tricks. They searched for the background light of the universe by studying data from over 700 blazars, or black hole gamma ray bursts pointed directly at Earth. They noticed that the blazars indicate the brightness of the background light between galaxies as they cut through it. And when it takes billions of years for those gamma rays to reach human eyes, you can gauge the light levels for large portions of the universe's past -- 90 percent of its history, researcher Alberto Dominguez told Popular Science.
Astronomers just measured a whole lot more than gravitational waves
A couple of weeks ago, the LIGO (Laser Interferometer Gravitational-Wave Observatory) and Virgo teams announced the detection of another set of gravitational waves -- the fourth since LIGO's first detection in September of 2015. The observations of these ripples in spacetime are extraordinary in and of themselves, no matter how many times we record them. However, while the first three sets of gravitational waves recorded were by the two LIGO observatories, the fourth was also detected by a newly established third -- Virgo -- located in Italy. And having three detectors allows researchers to triangulate the source of those waves with extraordinary precision.
Gamma ray telescope spots ancient, intense black holes
NASA's Fermi gamma ray telescope has been working overtime, it seems. Scientists using the instrument have spotted extreme astronomical phenomenon both at the far edge of the universe and close to home. They've detected the farthest known blazars, or galaxies whose central black holes are so massive (over 1 million times the Sun's mass) that they emit extremely intense light in every spectrum, including gamma rays. The oldest example existed just 1.4 billion years after the Big Bang -- ancient compared to the previous record-setter, which was visible "just" 2.1 billion years after the birth of the universe.
Gamma ray map offers best view yet of our galaxy's energy
Space is full of gamma rays and other intense forms of energy, but you've only ever had a partial picture of it. Ground-based telescopes can only see so much, and even the Fermi space telescope (designed to catch these energies) has missed out on a lot of it... until now, that is. NASA has posted a much more complete gamma ray map using 6 years' worth of refined Fermi data. The result is a far more detailed and comprehensive view of the energy 'bright spots' (between 50 billion to 2 trillion electron volts) in the Milky Way galaxy and beyond. The pretty picture you see above includes the leftovers of supernovae, pulsar wind nebulae and even galaxies whose supermassive black holes make them detectable from millions of light years away.
University of Michigan activates antimatter 'gun,' cartoon supervillians twirl moustaches anew
At the University of Michigan, an international team of physicists has begun experimenting with its tabletop-sized super laser, modding it into an antimatter "gun." It's not quite a black hole-firing pistol, but we're slightly terrified nonetheless. Up until now, machines capable of creating positrons -- coupled with electrons, they comprise the energy similar to what's emitted by black holes and pulsars -- have needed to be as large as they are expensive. Creating these antimatter beams on a small scale will hopefully give astrophysicists greater insight into the "enigmatic features" of gamma ray bursts that are "virtually impossible to address by relying on direct observations," according to a paper published at arXiv. While the blasts only last fractions of a second each, the researchers report each firing produces a particle-density output level comparable to the accelerator at CERN. Just like that, the Longhorns/Wolverines super-laser arms-race begins again.
Scientists bend gamma rays, could neuter radioactive waste (update: more credit)
Bending most light is easy; bending it in gamma ray form, however, has often been deemed impossible given how hard it is for electrons to react to the extreme frequencies. LMU Munich scientist Dietrich Habs and his Institut Laue-Langevin teammate Michael Jentschel have proven that assumption wrong: an experiment in blasting a silicon prism has shown that gamma rays will refract just slightly through the right material. If a lens is made out of a large-atom substance like gold to bend the rays further, the researchers envision focused beams of energy that could either detect radioactive material or even make it inert by wiping off neutrons and protons. In theory, it could turn a nuclear power plant's waste harmless. A practical use of the technology is still some distance off -- but that it's even within sight at all just feels like a breakthrough. Update: The research also involved the Max Planck Institute of Quantum Optics' Marc Günther. Thank you, Dr. Günther.
Everything around you is decaying, and this is what it sounds like (video)
Forget that math music nerd debate, there's no controversy here -- only the sweet, sweet sounds of cascading gamma rays. Working with Nuclear Safety and Training Group, KTH and nuclear physicists from AlbaNova University Centre's KSU, Swedish art collective Kollektivet Livet pieced together interactive software that mutates ionizing radiation into polarizing music. Incorporating all 3,175 known isotopes, the Radioactive Orchestra allows users to tweak decay rate and scale resulting in a personalized, hipster head-boppin glitch-hop track. We admit this sounds like old Bjork (doesn't all bloopy music?), but it's pretty nifty considering this is the sound of environmental decay. The project also has a more noble intent -- one aimed at swapping your radioactive fears for PC-acceptance. We're not sure this is going to get the unseen 'terror' onto anyone's Facebook Like list, but it will provide a good thirty minute distraction. Headphone nutters should plug-in for the full video after the break. [Thanks, Alexander]
The Boy Genius Report: BlackBerry 8705 / 8800
Field report tidbits from Engadget's mobile insider, the Boy Genius.So the Boy Genius has been digging deeper into all these rumors floating around about the supposed BlackBerry 8705 and 8800, and here's what we got: the BlackBerry 8705 will be a normal BlackBerry 8700 except with HAC (Hearing Aid Compatibility) and minor GSM Radio and component changes. No WiFi, nothing to email home about. We also got info on the next BlackBerry unit; the 8800 is code-named Gamma Ray (not 8200 as previously reported). The 8800 is basically the 8100 with a full QWERTY keyboard, and surprise, surprise as far as we can tell it will not have the pearl's camera. This can and might change, but as of now it will be thin, have a trackball, WiFi, microSD, and will not be released before the end of this year. The reason RIM has done away with the trackwheel on the side is because it was preventing them from making the devices thinner; they sure made 'em thinner now, but we're still not sure if that was the right move. We'll leave you with a quote from our man."RIM, I know you love how The Boy Genius has your stock above $80 per share for the first time since April. This is viral marketing at its best. Please look for all my scoops, and reviews here exclusively at Engadget."
