Navigation Links
There's more star-stuff out there but it's not dark matter
Date:5/30/2012

More atomic hydrogen gas the ultimate fuel for stars is lurking in today's Universe than we thought, CSIRO astronomer Dr Robert Braun has found. This is the first accurate measurement of this gas in galaxies close to our own.

Just after the Big Bang the Universe's matter was almost entirely hydrogen atoms. Over time this gas of atoms came together and generated galaxies, stars and planets and the process is still going on. Astronomers want to understand where, when and how the atomic gas is transformed to better understand the Universe in which we live.

By taking a new look at some archival data, Dr Braun, Chief Scientist at CSIRO Astronomy and Space Science in Sydney, Australia, has discovered that galaxies around us are hiding about a third more atomic hydrogen gas than previously calculated.

The study also shows that the gas is distributed very differently from how it was in the past, with much less in the galaxies' outer suburbs than billions of years ago.

"This means that it's much harder for galaxies to pull the gas in and form new stars," Dr Braun said. "It's why stars are forming 20 times more slowly now than in the past."

The new finding doesn't help solve the problem of "Dark Matter" lots of mass, detectable by its gravity, that we haven't yet identified.

"Even though there's more atomic hydrogen than we thought, it's not a big enough percentage to solve the Dark Matter problem. If what we are missing had the weight of a large kangaroo, what we have found would have the weight of a small echidna," Dr Braun said.

Nevertheless, the work will continue to feed into our understanding of how galaxies evolve over time.

Dr Braun based his work on observations made with radio telescopes: CSIRO's Parkes and Australia Telescope Compact Array telescopes in New South Wales (eastern Australia) and other radio telescopes in the USA and the Netherlands. His paper has been published in The Astrophysical Journal.


'/>"/>

Contact: Helen Sim
helen.sim@csiro.au
61-293-724-251
CSIRO Australia
Source:Eurekalert

Related biology news :

1. UGA study finds theres not always safety in numbers when it comes to extinction risk
2. Professor known for work with hunter-gatherers elected to American Academy of Arts and Sciences
3. Are there biosocial origins for antisocial behavior?
4. Gases drawn into smog particles stay there, UCI-led study reveals
5. Best time for a coffee break? Theres an app for that
6. Badwater Basin: Death Valley microbe thrives there
7. Is there a central brain area for hearing melodies and speech cues? Still an open question
8. Feathered friends are far from bird-brained when building nests
9. An all natural diet? Theres no such thing
10. Can we get there from here? Translating stem cell research into therapies
11. Mating rivalry among furred and feathered: Variety is spice of life
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:3/28/2017)... March 28, 2017 The report ... (Camera, Monitors, Servers, Storage Devices), Software (Video Analytics, VMS), ... - Global Forecast to 2022", published by MarketsandMarkets, the ... and is projected to reach USD 75.64 Billion by ... 2022. The base year considered for the study is ...
(Date:3/24/2017)... 24, 2017 Research and Markets has announced ... Analysis & Trends - Industry Forecast to 2025" report to ... The ... a CAGR of around 15.1% over the next decade to reach ... analyzes the market estimates and forecasts for all the given segments ...
(Date:3/22/2017)... VILNIUS, Lithuania , March 21, 2017 /PRNewswire/ ... identification and object recognition technologies, today announced the ... development kit (SDK), which provides improved facial recognition ... safety cameras on a single computer. The new ... algorithms to improve accuracy, and it utilizes a ...
Breaking Biology News(10 mins):
(Date:9/19/2017)... ... September 19, 2017 , ... Participants of ... a high-performance fume hood. Along with the advantages and disadvantages of ductless, filtered ... ducted hoods in the laboratory. , Attendees will learn from an industry expert ...
(Date:9/19/2017)... (PRWEB) , ... September 19, 2017 , ... ... an biological outbreak is about to be eliminated, said Lyle Probst, President, CEO ... FireflyDX™ technologies different than other pathogen detection solutions, Probst said, “Sample ...
(Date:9/19/2017)... ... September 19, 2017 , ... ... DFS) cybersecurity regulations have transitioned into full force and effect. The law ... state (“Covered Entities”) to conduct an annual, professional, comprehensive cybersecurity risk assessment, ...
(Date:9/18/2017)... --  Montrium , a growing leader in Electronic Trial Master ... groundbreaking non-profit research organization, Multidisciplinary Association for Psychedelic Studies (MAPS). ... MAPS Public Benefit ... ... to MDMA for the treatment of Posttraumatic Stress Disorder (PTSD). MAPS ...
Breaking Biology Technology: