Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Astrophysicists discover massive forming galaxies

18.09.2003


A Lawrence Livermore National Laboratory astrophysicist, in collaboration with international researchers, has found evidence for the synchronous formation of massive, luminous elliptical galaxies in young galaxy clusters.



The forming galaxies were detected at sub-millimeter wavelengths. Emission at these wavelengths is due to dust from young stars that is heated by the stars or by active black holes. The galaxies were grouped around high-red shift radio galaxies, the most massive systems known, suggesting that they all formed at approximately the same time.

In the present universe, the most massive galaxies are elliptical galaxies, which are found in the centers of rich galaxy clusters. The stars in these galaxies are now old, and must have formed at much earlier times. The enormous bursts of star formation that build these galaxies produce large quantities of dust that can be observed at submillimeter wavelengths.


Wil van Breugel, of Livermore’s Institute of Geophysics and Planetary Physics, along with scientists from the University of Edinburgh, the University of Durham, Instituto Nacional de Astrofiscia and Leiden Observatory in The Netherlands, present their research, "The Formation of Cluster Elliptical Galaxies as Revealed by Extensive Star Formation," in the Sept. 18 edition of Nature.

Earlier sub-millimeter studies of high-red shift radio galaxies have shown that their star-formation rates are large enough to build a massive galaxy. However, that research provided no information on the spatial extent of the emission or on the star-formation in their environments. By mapping seven objects with varying red shifts, the team was able to illustrate the distribution of dust-reradiated emission in and around the radio galaxies.

"One of the most striking aspects of these maps is that we can see that the dust emission from the central radio galaxy is very extended, the size of many times the diameter of our own galaxy," van Breugel said. "But even more interesting is that we also found other massive forming galaxies near these radio galaxies, suggesting that they all started their formation at approximately the same time." Models of galaxy formation show that the most massive galaxies form in overdense regions that then form clusters of galaxies.

The discovery of groups of luminous, dusty galaxies at high red shift suggests that the scientists may have witnessed this process for the first time.


Founded in 1952, Lawrence Livermore National Laboratory is a national security laboratory, with a mission to ensure national security and apply science and technology to the important issues of our time. Lawrence Livermore National Laboratory is managed by the University of California for the U.S. Department of Energy’s National Nuclear Security Administration.

Anne Stark | EurekAlert!
Further information:
http://www.berkeley.edu/

More articles from Physics and Astronomy:

nachricht Innovative LED High Power Light Source for UV
22.06.2017 | Omicron - Laserage Laserprodukte GmbH

nachricht Spin liquids − back to the roots
22.06.2017 | Universität Augsburg

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: Climate satellite: Tracking methane with robust laser technology

Heatwaves in the Arctic, longer periods of vegetation in Europe, severe floods in West Africa – starting in 2021, scientists want to explore the emissions of the greenhouse gas methane with the German-French satellite MERLIN. This is made possible by a new robust laser system of the Fraunhofer Institute for Laser Technology ILT in Aachen, which achieves unprecedented measurement accuracy.

Methane is primarily the result of the decomposition of organic matter. The gas has a 25 times greater warming potential than carbon dioxide, but is not as...

Im Focus: How protons move through a fuel cell

Hydrogen is regarded as the energy source of the future: It is produced with solar power and can be used to generate heat and electricity in fuel cells. Empa researchers have now succeeded in decoding the movement of hydrogen ions in crystals – a key step towards more efficient energy conversion in the hydrogen industry of tomorrow.

As charge carriers, electrons and ions play the leading role in electrochemical energy storage devices and converters such as batteries and fuel cells. Proton...

Im Focus: A unique data centre for cosmological simulations

Scientists from the Excellence Cluster Universe at the Ludwig-Maximilians-Universität Munich have establised "Cosmowebportal", a unique data centre for cosmological simulations located at the Leibniz Supercomputing Centre (LRZ) of the Bavarian Academy of Sciences. The complete results of a series of large hydrodynamical cosmological simulations are available, with data volumes typically exceeding several hundred terabytes. Scientists worldwide can interactively explore these complex simulations via a web interface and directly access the results.

With current telescopes, scientists can observe our Universe’s galaxies and galaxy clusters and their distribution along an invisible cosmic web. From the...

Im Focus: Scientists develop molecular thermometer for contactless measurement using infrared light

Temperature measurements possible even on the smallest scale / Molecular ruby for use in material sciences, biology, and medicine

Chemists at Johannes Gutenberg University Mainz (JGU) in cooperation with researchers of the German Federal Institute for Materials Research and Testing (BAM)...

Im Focus: Optoelectronic Inline Measurement – Accurate to the Nanometer

Germany counts high-precision manufacturing processes among its advantages as a location. It’s not just the aerospace and automotive industries that require almost waste-free, high-precision manufacturing to provide an efficient way of testing the shape and orientation tolerances of products. Since current inline measurement technology not yet provides the required accuracy, the Fraunhofer Institute for Laser Technology ILT is collaborating with four renowned industry partners in the INSPIRE project to develop inline sensors with a new accuracy class. Funded by the German Federal Ministry of Education and Research (BMBF), the project is scheduled to run until the end of 2019.

New Manufacturing Technologies for New Products

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Plants are networkers

19.06.2017 | Event News

Digital Survival Training for Executives

13.06.2017 | Event News

Global Learning Council Summit 2017

13.06.2017 | Event News

 
Latest News

Innovative LED High Power Light Source for UV

22.06.2017 | Physics and Astronomy

Mathematical confirmation: Rewiring financial networks reduces systemic risk

22.06.2017 | Business and Finance

Spin liquids − back to the roots

22.06.2017 | Physics and Astronomy

VideoLinks
B2B-VideoLinks
More VideoLinks >>>