Image: Gemini Observatory
Some galaxies may have torus envy, if a new study is any indication. The most sensitive imaging yet of nearby galaxy M87’s core reveals that the black hole residing there has either a nonexistent or much fainter ring of dust around it compared with its peers. Scientists had thought that these rings were key features of such highly energetic galaxies. The puzzling finding appears today in the Astrophysical Journal Letters.
The current model of active galaxies such as M87 posits that each one harbors at its center a black hole many millions or even billions of times more massive than our own sun, all packed into a space about the size of our solar system. A disk of gas and dust drawn in by the black hole pours x-rays and ultraviolet radiation outward, where they strike a cooler layer of material, the torus, making it glow in the infrared. Everything should get bigger as the black hole gets bigger, team member Eric Perlman of the University of Maryland comments.
But when the astronomers trained the Gemini North Telescope in Hawaii onto M87, scanning it for infrared emissions, they found evidence of at best a meager torus—one that, if there at all, is at least 1,000 times fainter than that of Centaurus A, another, less powerful active galaxy. "That was a big surprise, [to find out] it was that much fainter," Perlman says. "What I think this means is there’s a lot more variety in active galaxies than we thought." A previous study hinted that M87’s torus might be a little weak, he notes, but it didn’t have the sensitivity to confirm that.
JR Minkel | Scientific American
APEX takes a glimpse into the heart of darkness
25.05.2018 | Max-Planck-Institut für Radioastronomie
First chip-scale broadband optical system that can sense molecules in the mid-IR
24.05.2018 | Columbia University School of Engineering and Applied Science
The more electronics steer, accelerate and brake cars, the more important it is to protect them against cyber-attacks. That is why 15 partners from industry and academia will work together over the next three years on new approaches to IT security in self-driving cars. The joint project goes by the name Security For Connected, Autonomous Cars (SecForCARs) and has funding of €7.2 million from the German Federal Ministry of Education and Research. Infineon is leading the project.
Vehicles already offer diverse communication interfaces and more and more automated functions, such as distance and lane-keeping assist systems. At the same...
A research team led by physicists at the Technical University of Munich (TUM) has developed molecular nanoswitches that can be toggled between two structurally different states using an applied voltage. They can serve as the basis for a pioneering class of devices that could replace silicon-based components with organic molecules.
The development of new electronic technologies drives the incessant reduction of functional component sizes. In the context of an international collaborative...
At the LASYS 2018, from June 5th to 7th, the Laser Zentrum Hannover e.V. (LZH) will be showcasing processes for the laser material processing of tomorrow in hall 4 at stand 4E75. With blown bomb shells the LZH will present first results of a research project on civil security.
At this year's LASYS, the LZH will exhibit light-based processes such as cutting, welding, ablation and structuring as well as additive manufacturing for...
There are videos on the internet that can make one marvel at technology. For example, a smartphone is casually bent around the arm or a thin-film display is rolled in all directions and with almost every diameter. From the user's point of view, this looks fantastic. From a professional point of view, however, the question arises: Is that already possible?
At Display Week 2018, scientists from the Fraunhofer Institute for Applied Polymer Research IAP will be demonstrating today’s technological possibilities and...
So-called quantum many-body scars allow quantum systems to stay out of equilibrium much longer, explaining experiment | Study published in Nature Physics
Recently, researchers from Harvard and MIT succeeded in trapping a record 53 atoms and individually controlling their quantum state, realizing what is called a...
25.05.2018 | Event News
02.05.2018 | Event News
13.04.2018 | Event News
25.05.2018 | Event News
25.05.2018 | Machine Engineering
25.05.2018 | Life Sciences