“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
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22.02.2017 | Carnegie Institution for Science
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The Fraunhofer IWS Dresden and Technische Universität Dresden inaugurated their jointly operated Center for Additive Manufacturing Dresden (AMCD) with a festive ceremony on February 7, 2017. Scientists from various disciplines perform research on materials, additive manufacturing processes and innovative technologies, which build up components in a layer by layer process. This technology opens up new horizons for component design and combinations of functions. For example during fabrication, electrical conductors and sensors are already able to be additively manufactured into components. They provide information about stress conditions of a product during operation.
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Nanometer-scale magnetic perforated grids could create new possibilities for computing. Together with international colleagues, scientists from the Helmholtz Zentrum Dresden-Rossendorf (HZDR) have shown how a cobalt grid can be reliably programmed at room temperature. In addition they discovered that for every hole ("antidot") three magnetic states can be configured. The results have been published in the journal "Scientific Reports".
Physicist Dr. Rantej Bali from the HZDR, together with scientists from Singapore and Australia, designed a special grid structure in a thin layer of cobalt in...
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