Featured Research

from universities, journals, and other organizations

Astrophysicists Discover Massive Forming Galaxies

Date:
September 19, 2003
Source:
University Of California - Berkeley
Summary:
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.

LIVERMORE, Calif. - 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.

Related Articles


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.


Story Source:

The above story is based on materials provided by University Of California - Berkeley. Note: Materials may be edited for content and length.


Cite This Page:

University Of California - Berkeley. "Astrophysicists Discover Massive Forming Galaxies." ScienceDaily. ScienceDaily, 19 September 2003. <www.sciencedaily.com/releases/2003/09/030918092156.htm>.
University Of California - Berkeley. (2003, September 19). Astrophysicists Discover Massive Forming Galaxies. ScienceDaily. Retrieved December 19, 2014 from www.sciencedaily.com/releases/2003/09/030918092156.htm
University Of California - Berkeley. "Astrophysicists Discover Massive Forming Galaxies." ScienceDaily. www.sciencedaily.com/releases/2003/09/030918092156.htm (accessed December 19, 2014).

Share This


More From ScienceDaily



More Space & Time News

Friday, December 19, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Rover Finds More Clues About Possible Life On Mars

Rover Finds More Clues About Possible Life On Mars

Newsy (Dec. 17, 2014) NASA's Curiosity rover detected methane on Mars and organic compounds on the surface, but it doesn't quite prove there was life ... yet. Video provided by Newsy
Powered by NewsLook.com
Evidence of Life on Mars? NASA Rover Finds Methane, Organic Chemicals

Evidence of Life on Mars? NASA Rover Finds Methane, Organic Chemicals

Reuters - US Online Video (Dec. 16, 2014) NASA's Mars Curiosity rover finds methane in the Martian atmosphere and organic chemicals in the planet's soil, the latest hint that Mars was once suitable for microbial life. Linda So reports. Video provided by Reuters
Powered by NewsLook.com
Geminids Meteor Shower Lights Up Skies in China

Geminids Meteor Shower Lights Up Skies in China

AFP (Dec. 16, 2014) The Geminids meteor shower lights up the skies over the Changbai Mountains in northeast China. Duration: 01:03 Video provided by AFP
Powered by NewsLook.com
Raw: Defense Satellite Launches from California

Raw: Defense Satellite Launches from California

AP (Dec. 13, 2014) A U.S. defense satellite launched from California's central coast on Friday after weather delays caused by a major storm that drenched the state. (Dec. 13) Video provided by AP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Space & Time

Matter & Energy

Computers & Math

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins