Featured Research

from universities, journals, and other organizations

Australian Researcher Discovers Galaxies Of Gas

Date:
July 22, 2003
Source:
CSIRO Australia
Summary:
Any dictionary will tell you that a galaxy is a vast collection of stars, floating deep in space. But this definition may need revision following new research by an ANU graduate student who has discovered galaxies that consist mostly of gas, rather than stars.

Any dictionary will tell you that a galaxy is a vast collection of stars, floating deep in space. But this definition may need revision following new research by an ANU graduate student who has discovered galaxies that consist mostly of gas, rather than stars.

Related Articles


In research to be presented to the General Assembly of the International Astronomical Union in Sydney today, Brad Warren will reveal his discovery of twenty gassy galaxies, which have very few stars.

"When you look for gas [in these galaxies] the signal just booms in," Mr Warren said. "But when you look for stars, all you see is a barely recognisable smudge."

The galaxies are vast discs of hydrogen, tens of thousands of light years across, weighing more than a billion suns, with a tiny number of barely visible stars in their centre.

For an unknown reason, they have not transformed their rich source of hydrogen gas into masses of stars like their brilliant, twinkling counterparts.

"Hydrogen is the most common element in the Universe and it forms the building blocks for stars," Mr Warren said.

"Most galaxies, like our own Milky Way, have transformed most of their gas into stars but the galaxies we have discovered have held back and we are not sure why.

"Discovering this missing link will give us important insights into how, when and why galaxies, such as our own, formed."

Although the existence of gassy galaxies has been documented in the past, it is the first time they have been discovered with such prominent discrepancies between the amount of hydrogen gas and stars.

"This research throws up a further challenge in the ongoing quest to discover the secrets of the Universe," Mr Warren said.

Mr Warren, from the Research School of Astronomy and Astrophysics, collaborated with fellow ANU researcher, Dr Helmut Jerjen, and Dr Baerbel Koribalski, from CSIRO's Australia Telescope National facility.

The team used three of Australia's most powerful telescopes for their research - the Parkes Radio Telescope; the Australia Telescope Compact Array near Narrabri and the University's 2.3 metre telescope at Siding Spring Observatory, Coonabarabran.


Story Source:

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


Cite This Page:

CSIRO Australia. "Australian Researcher Discovers Galaxies Of Gas." ScienceDaily. ScienceDaily, 22 July 2003. <www.sciencedaily.com/releases/2003/07/030722074827.htm>.
CSIRO Australia. (2003, July 22). Australian Researcher Discovers Galaxies Of Gas. ScienceDaily. Retrieved December 19, 2014 from www.sciencedaily.com/releases/2003/07/030722074827.htm
CSIRO Australia. "Australian Researcher Discovers Galaxies Of Gas." ScienceDaily. www.sciencedaily.com/releases/2003/07/030722074827.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

Spokesman: 'NORAD Ready to Track Santa'

Spokesman: 'NORAD Ready to Track Santa'

AP (Dec. 19, 2014) Pentagon spokesman Rear Adm. John Kirby said that NORAD is ready to track Santa Claus as he delivers gifts next week. Speaking tongue-in-cheek, he said if Santa drops anything off his sleigh, "we've got destroyers out there to pick them up." (Dec. 19) Video provided by AP
Powered by NewsLook.com
NASA's Planet-Finding Kepler Mission Isn't Over After All

NASA's Planet-Finding Kepler Mission Isn't Over After All

Newsy (Dec. 18, 2014) More than a year after NASA declared the Kepler spacecraft broken beyond repair, scientists have figured out how to continue getting useful data. Video provided by Newsy
Powered by NewsLook.com
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

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