MUSE instrument allows deepest spectroscopic observations ever
An international team of astronomers with the involvement of the University of Göttingen has conducted the deepest spectroscopic survey ever. Using the MUSE instrument (Multi Unit Spectroscopic Explorer) on European Southern Observatory’s (ESO) Very Large Telescope the scientists succeeded to measure distances and properties of 1600 very faint galaxies including 72 galaxies that had never been detected before. This dataset resulted in several science papers that were published in a special issue of the journal Astronomy & Astrophysics.
The astronomers focused on the Hubble Ultra Deep Field (HUDF), a much-studied patch of the southern constellation of “Fornax”. Three to five working groups independently analyzed the obtained data with their own specialist software.
To prevent mistakes, all teams compared their results among each other. Only if at least two or three teams came to the same result, the data of the distances and properties of the galaxies farthest away and oldest were included in the final catalogue. Scientists of Göttingen University formed one team that analyzed the spectroscopic information.
The much more advanced observation results compared to the images of the NASA/ESA Hubble Space Telescope and others are explained by the technology of the MUSE instrument: It splits up the light from every point in the image into its component colours to create a spectrum.
This allows scientists to measure the distance, colours and other properties of all the galaxies that can be seen with the MUSE instrument. Galaxies are the basic elements of the universe. They consist of millions to billions of stars.
“The MUSE data provide a new view of dim, very distant galaxies, seen near the beginning of the Universe about 13 billion years ago”, explains Göttingen Astrophysicist Professor Wolfram Kollatschny, who participated in the study.
“The instrument detected galaxies 100 times fainter than in previous surveys, adding to an already richly observed field and deepening our understanding of galaxies across the ages.”
Prof. Dr. Wolfram Kollatschny
University of Göttingen
Faculty of Physics
Institute for Astrophysics
Friedrich-Hund-Platz 1, 37077 Göttingen
Phone +49 551 39-5065
Thomas Richter | idw - Informationsdienst Wissenschaft
NUS engineers develop novel method for resolving spin texture of topological surface states using transport measurements
26.04.2018 | National University of Singapore
European particle-accelerator community publishes the first industry compendium
26.04.2018 | Fraunhofer-Institut für Organische Elektronik, Elektronenstrahl- und Plasmatechnik FEP
Magnetic resonance imaging, or MRI, is a widely used medical tool for taking pictures of the insides of our body. One way to make MRI scans easier to read is...
At the Hannover Messe 2018, the Bundesanstalt für Materialforschung und-prüfung (BAM) will show how, in the future, astronauts could produce their own tools or spare parts in zero gravity using 3D printing. This will reduce, weight and transport costs for space missions. Visitors can experience the innovative additive manufacturing process live at the fair.
Powder-based additive manufacturing in zero gravity is the name of the project in which a component is produced by applying metallic powder layers and then...
Physicists at the Laboratory for Attosecond Physics, which is jointly run by Ludwig-Maximilians-Universität and the Max Planck Institute of Quantum Optics, have developed a high-power laser system that generates ultrashort pulses of light covering a large share of the mid-infrared spectrum. The researchers envisage a wide range of applications for the technology – in the early diagnosis of cancer, for instance.
Molecules are the building blocks of life. Like all other organisms, we are made of them. They control our biorhythm, and they can also reflect our state of...
University of Connecticut researchers have created a biodegradable composite made of silk fibers that can be used to repair broken load-bearing bones without the complications sometimes presented by other materials.
Repairing major load-bearing bones such as those in the leg can be a long and uncomfortable process.
Study published in the journal ACS Applied Materials & Interfaces is the outcome of an international effort that included teams from Dresden and Berlin in Germany, and the US.
Scientists at the Helmholtz-Zentrum Dresden-Rossendorf (HZDR) together with colleagues from the Helmholtz-Zentrum Berlin (HZB) and the University of Virginia...
13.04.2018 | Event News
12.04.2018 | Event News
09.04.2018 | Event News
26.04.2018 | Power and Electrical Engineering
26.04.2018 | Life Sciences
26.04.2018 | Power and Electrical Engineering