Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

The universe up close

15.01.2018

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 Hubble Ultra Deep Field seen with MUSE.

Photo: ESO/MUSE HUDF collaboration

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.”

Contact:
Prof. Dr. Wolfram Kollatschny
University of Göttingen
Faculty of Physics
Institute for Astrophysics
Friedrich-Hund-Platz 1, 37077 Göttingen
Phone +49 551 39-5065
Email: wkollat@astro.physik.uni-goettingen.de

Weitere Informationen:

http://www.aanda.org/articles/aa/abs/2017/12/contents/contents.html
http://www.astro.physik.uni-goettingen.de/~wkollat

Thomas Richter | idw - Informationsdienst Wissenschaft

More articles from Physics and Astronomy:

nachricht Computer model predicts how fracturing metallic glass releases energy at the atomic level
20.07.2018 | American Institute of Physics

nachricht What happens when we heat the atomic lattice of a magnet all of a sudden?
18.07.2018 | Forschungsverbund Berlin

All articles from Physics and Astronomy >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Future electronic components to be printed like newspapers

A new manufacturing technique uses a process similar to newspaper printing to form smoother and more flexible metals for making ultrafast electronic devices.

The low-cost process, developed by Purdue University researchers, combines tools already used in industry for manufacturing metals on a large scale, but uses...

Im Focus: First evidence on the source of extragalactic particles

For the first time ever, scientists have determined the cosmic origin of highest-energy neutrinos. A research group led by IceCube scientist Elisa Resconi, spokesperson of the Collaborative Research Center SFB1258 at the Technical University of Munich (TUM), provides an important piece of evidence that the particles detected by the IceCube neutrino telescope at the South Pole originate from a galaxy four billion light-years away from Earth.

To rule out other origins with certainty, the team led by neutrino physicist Elisa Resconi from the Technical University of Munich and multi-wavelength...

Im Focus: Magnetic vortices: Two independent magnetic skyrmion phases discovered in a single material

For the first time a team of researchers have discovered two different phases of magnetic skyrmions in a single material. Physicists of the Technical Universities of Munich and Dresden and the University of Cologne can now better study and understand the properties of these magnetic structures, which are important for both basic research and applications.

Whirlpools are an everyday experience in a bath tub: When the water is drained a circular vortex is formed. Typically, such whirls are rather stable. Similar...

Im Focus: Breaking the bond: To take part or not?

Physicists working with Roland Wester at the University of Innsbruck have investigated if and how chemical reactions can be influenced by targeted vibrational excitation of the reactants. They were able to demonstrate that excitation with a laser beam does not affect the efficiency of a chemical exchange reaction and that the excited molecular group acts only as a spectator in the reaction.

A frequently used reaction in organic chemistry is nucleophilic substitution. It plays, for example, an important role in in the synthesis of new chemical...

Im Focus: New 2D Spectroscopy Methods

Optical spectroscopy allows investigating the energy structure and dynamic properties of complex quantum systems. Researchers from the University of Würzburg present two new approaches of coherent two-dimensional spectroscopy.

"Put an excitation into the system and observe how it evolves." According to physicist Professor Tobias Brixner, this is the credo of optical spectroscopy....

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

Leading experts in Diabetes, Metabolism and Biomedical Engineering discuss Precision Medicine

13.07.2018 | Event News

Conference on Laser Polishing – LaP: Fine Tuning for Surfaces

12.07.2018 | Event News

11th European Wood-based Panel Symposium 2018: Meeting point for the wood-based materials industry

03.07.2018 | Event News

 
Latest News

A smart safe rechargeable zinc ion battery based on sol-gel transition electrolytes

20.07.2018 | Power and Electrical Engineering

Reversing cause and effect is no trouble for quantum computers

20.07.2018 | Information Technology

Princeton-UPenn research team finds physics treasure hidden in a wallpaper pattern

20.07.2018 | Materials Sciences

VideoLinks
Science & Research
Overview of more VideoLinks >>>