“Galaxies going through an intensive phase of star formation show a certain distinctive and characteristic gradation in their spectral energy distribution. We can detect this gradation by observing a galaxy through a telescope with different filters“, states Dr. Adi Zitrin, who is part of Prof. Bartelmann’s work group. However, the gradation shifts in just as characteristic a manner depending on how far away the galaxy is. In the case of MACS1149-JD1 this shift, known as redshift, has a value of 9.6. According to the Heidelberg scientists, this puts the galaxy at a distance which light has covered within 13.2 billion years.Essential clues that led to the discovery of MACS1149-JD1 were provided by a method of analysis also developed at the ZAH. This method has scientists measuring the distortion of the telescope images of galaxies located far behind the galaxy clusters, a distortion that is caused by the large amount of invisible dark matter in the clusters. In the case of MACS1149+22, the researchers detected a total of seven background galaxies whose image was enhanced, distorted and split into 23 multiple images by the gravitational effect of the galaxy cluster. This enabled the team to predict the location of a light-enhanced galaxy at a redshift of 9.6. The scientists concluded that the galaxy must have formed as early as 490 million years after the Big Bang.
Marietta Fuhrmann-Koch | idw
IceCube experiment finds Earth can block high-energy particles from nuclear reactions
24.11.2017 | Penn State
New proton record: Researchers measure magnetic moment with greatest possible precision
24.11.2017 | Johannes Gutenberg-Universität Mainz
High-precision measurement of the g-factor eleven times more precise than before / Results indicate a strong similarity between protons and antiprotons
The magnetic moment of an individual proton is inconceivably small, but can still be quantified. The basis for undertaking this measurement was laid over ten...
Heat from the friction of rocks caused by tidal forces could be the “engine” for the hydrothermal activity on Saturn's moon Enceladus. This presupposes that...
The WHO reports an estimated 429,000 malaria deaths each year. The disease mostly affects tropical and subtropical regions and in particular the African continent. The Fraunhofer Institute for Silicate Research ISC teamed up with the Fraunhofer Institute for Molecular Biology and Applied Ecology IME and the Institute of Tropical Medicine at the University of Tübingen for a new test method to detect malaria parasites in blood. The idea of the research project “NanoFRET” is to develop a highly sensitive and reliable rapid diagnostic test so that patient treatment can begin as early as possible.
Malaria is caused by parasites transmitted by mosquito bite. The most dangerous form of malaria is malaria tropica. Left untreated, it is fatal in most cases....
The formation of stars in distant galaxies is still largely unexplored. For the first time, astron-omers at the University of Geneva have now been able to closely observe a star system six billion light-years away. In doing so, they are confirming earlier simulations made by the University of Zurich. One special effect is made possible by the multiple reflections of images that run through the cosmos like a snake.
Today, astronomers have a pretty accurate idea of how stars were formed in the recent cosmic past. But do these laws also apply to older galaxies? For around a...
Just because someone is smart and well-motivated doesn't mean he or she can learn the visual skills needed to excel at tasks like matching fingerprints, interpreting medical X-rays, keeping track of aircraft on radar displays or forensic face matching.
That is the implication of a new study which shows for the first time that there is a broad range of differences in people's visual ability and that these...
15.11.2017 | Event News
15.11.2017 | Event News
30.10.2017 | Event News
24.11.2017 | Physics and Astronomy
24.11.2017 | Health and Medicine
24.11.2017 | Earth Sciences