This end only comes to the heavies of the neighborhood, those that weigh 30 times as much as our sun or more. When it happens, their dazzling light can be seen at much greater distances than before the event. Thus, early observers of the heavens saw bright points of light appear in the sky where none had existed the night before, and they dubbed them "supernova" or "new stars."
Until now, scientists had only been able to spot supernovae several days after stars in the process of exploding had begun to brighten. But the scientists who investigate this phenomenon needed to be able to observe what happens to these stars in real time. That's precisely what NASA scientists have managed to do for the first time, and their achievement has confirmed theoretical research carried out by Prof. Eli Waxman of the Weizmann Institute's Department of Condensed Matter Physics.
Aided by NASA's advanced research satellite, Swift, the scientists succeeded in detecting a supernova just 160 seconds after the event began. Seeing the supernova so early allowed the scientists to observe, in addition to the material being expelled in all directions, jets of gamma rays and x rays shooting out from the vicinity of the explosion.
This confirmed the theory that supernovas are the source of gamma ray bursts that have been measured in the past. They also found that the star was composed mainly of oxygen and carbon, signs that the star was, indeed, very heavy. For the first time, scientists were able to identify shock waves that give rise to the gamma and x-ray radiation emanating from the center of the star and moving toward the surface. These findings have bolstered the theoretical model of such supernova explosions proposed by Waxman several years ago.
Jennifer Manning | EurekAlert!
Climate cycles may explain how running water carved Mars' surface features
02.12.2016 | Penn State
What do Netflix, Google and planetary systems have in common?
02.12.2016 | University of Toronto
A multi-institutional research collaboration has created a novel approach for fabricating three-dimensional micro-optics through the shape-defined formation of porous silicon (PSi), with broad impacts in integrated optoelectronics, imaging, and photovoltaics.
Working with colleagues at Stanford and The Dow Chemical Company, researchers at the University of Illinois at Urbana-Champaign fabricated 3-D birefringent...
In experiments with magnetic atoms conducted at extremely low temperatures, scientists have demonstrated a unique phase of matter: The atoms form a new type of quantum liquid or quantum droplet state. These so called quantum droplets may preserve their form in absence of external confinement because of quantum effects. The joint team of experimental physicists from Innsbruck and theoretical physicists from Hannover report on their findings in the journal Physical Review X.
“Our Quantum droplets are in the gas phase but they still drop like a rock,” explains experimental physicist Francesca Ferlaino when talking about the...
The Max Planck Institute for Physics (MPP) is opening up a new research field. A workshop from November 21 - 22, 2016 will mark the start of activities for an innovative axion experiment. Axions are still only purely hypothetical particles. Their detection could solve two fundamental problems in particle physics: What dark matter consists of and why it has not yet been possible to directly observe a CP violation for the strong interaction.
The “MADMAX” project is the MPP’s commitment to axion research. Axions are so far only a theoretical prediction and are difficult to detect: on the one hand,...
Broadband rotational spectroscopy unravels structural reshaping of isolated molecules in the gas phase to accommodate water
In two recent publications in the Journal of Chemical Physics and in the Journal of Physical Chemistry Letters, researchers around Melanie Schnell from the Max...
The efficiency of power electronic systems is not solely dependent on electrical efficiency but also on weight, for example, in mobile systems. When the weight of relevant components and devices in airplanes, for instance, is reduced, fuel savings can be achieved and correspondingly greenhouse gas emissions decreased. New materials and components based on gallium nitride (GaN) can help to reduce weight and increase the efficiency. With these new materials, power electronic switches can be operated at higher switching frequency, resulting in higher power density and lower material costs.
Researchers at the Fraunhofer Institute for Solar Energy Systems ISE together with partners have investigated how these materials can be used to make power...
16.11.2016 | Event News
01.11.2016 | Event News
14.10.2016 | Event News
02.12.2016 | Medical Engineering
02.12.2016 | Agricultural and Forestry Science
02.12.2016 | Physics and Astronomy