Featured Research

from universities, journals, and other organizations

Cosmic Baby-boom: Large Population Of Galaxies Found In The Young Universe

Date:
September 22, 2005
Source:
European Southern Observatory
Summary:
The Universe was a more fertile place soon after it was formed than has previously been suspected. This is the conclusion of a team of French and Italian astronomers who, using ESO's Very Large Telescope, made the surprising discovery of a large and unknown population of distant galaxies observed when the Universe was only 10 to 30% its present age. These observations are challenging the current knowledge of the formation and evolution of galaxies.

This photo shows a small patch of the sky surveyed by the VVDS team. This colour-composite image based on observations made with Megacam at the CFHT indicates a few of the newly found distant galaxies (encircled ones) based on VIMOS/VLT data. (credit: LAM-OAMP/CFHT)

The Universe was a more fertile place soon after it wasformed than has previously been suspected. A team of French and Italianastronomers [1] made indeed the surprising discovery of a large andunknown population of distant galaxies observed when the Universe wasonly 10 to 30% its present age.

Related Articles


This breakthrough is based onobservations made with the Visible Multi-Object Spectrograph (VIMOS) aspart of the VIMOS VLT Deep Survey (VVDS). The VVDS started early 2002on Melipal, one of the 8.2-m telescopes of ESO's Very Large TelescopeArray [2].

In a total sample of about 8,000 galaxies selectedonly on the basis of their observed brightness in red light, almost1,000 bright and vigorously star forming galaxies were discovered thatwere formed between 9 and 12 billion years ago (i.e. about 1,500 to4,500 million years after the Big Bang).

"To our surprise, saysOlivier Le Fθvre, from the Laboratoire d'Astrophysique de Marseille(France) and co-leader of the VVDS project, "this is two to six timeshigher than had been found previously. These galaxies had been missedbecause previous surveys had selected objects in a much morerestrictive manner than we did. And they did so to accommodate the muchlower efficiency of the previous generation of instruments."

Whileobservations and models have consistently indicated that the Universehad not yet formed many stars in the first billion years of cosmictime, the discovery announced today by scientists calls for asignificant change in this picture. The astronomers indeed find thatstars formed two to three times faster than previously estimated.

"Theseobservations will demand a profound reassessment of our theories of theformation and evolution of galaxies in a changing Universe", saysGianpaolo Vettolani, the other co-leader of the VVDS project, workingat INAF-IRA in Bologna (Italy).

These results are reported in theSeptember 22 issue of the journal Nature (Le Fθvre et al., "A largepopulation of galaxies 9 to 12 billion years back in the life of theUniverse").


Story Source:

The above story is based on materials provided by European Southern Observatory. Note: Materials may be edited for content and length.


Cite This Page:

European Southern Observatory. "Cosmic Baby-boom: Large Population Of Galaxies Found In The Young Universe." ScienceDaily. ScienceDaily, 22 September 2005. <www.sciencedaily.com/releases/2005/09/050922015226.htm>.
European Southern Observatory. (2005, September 22). Cosmic Baby-boom: Large Population Of Galaxies Found In The Young Universe. ScienceDaily. Retrieved November 24, 2014 from www.sciencedaily.com/releases/2005/09/050922015226.htm
European Southern Observatory. "Cosmic Baby-boom: Large Population Of Galaxies Found In The Young Universe." ScienceDaily. www.sciencedaily.com/releases/2005/09/050922015226.htm (accessed November 24, 2014).

Share This


More From ScienceDaily



More Space & Time News

Monday, November 24, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Soyuz Spacecraft Docks With International Space Station: NASA

Soyuz Spacecraft Docks With International Space Station: NASA

AFP (Nov. 24, 2014) — A Russian Soyuz spacecraft carrying Italy's first female astronaut safely docks with the International Space Station, according to NASA. Duration: 00:40 Video provided by AFP
Powered by NewsLook.com
Multi-National Crew Safely Docks at Space Station

Multi-National Crew Safely Docks at Space Station

Reuters - US Online Video (Nov. 24, 2014) — A Russian Soyuz rocket delivers a multi-national trio to the International Space Station. Rough Cut (no reporter narration). Video provided by Reuters
Powered by NewsLook.com
Raw: Soyuz Docks With Int'l Space Station

Raw: Soyuz Docks With Int'l Space Station

AP (Nov. 23, 2014) — A Russian capsule carrying three astronauts from Russia, the United States and Italy has arrived at the International Space Station. (Nov. 23) Video provided by AP
Powered by NewsLook.com
Raw: Crew Blasts Off for Int'l Space Station

Raw: Crew Blasts Off for Int'l Space Station

AP (Nov. 23, 2014) — A Russian capsule carrying three astronauts from Russia, the United States and Italy has blasted off for the International Space Station. (Nov. 23) 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