Featured Research

from universities, journals, and other organizations

Big Bang Theory Saved

Date:
October 27, 2006
Source:
Monash University
Summary:
An apparent discrepancy in the Big Bang theory of the universe's evolution has been reconciled by astrophysicists examining the movement of gases in stars. Professor John Lattanzio from Monash's School of Mathematical Sciences and Director of the Centre for Stellar and Planetary Astrophysics said the confusion surrounding the Big Bang revolved around the amount of the gas Helium 3 in the universe.

Deep in the interior of a red giant star, hydrogen rich clouds (red) are seen to float above the hydrogen burning shell (blue). In this three-dimensional simulation, the energy production rate in the burning shell exceeds that of the sun by a factor greater than 100. It heats the previously homogeneous region around it converting 3He to 4He and hydrogen, producing a hydrogen rich region that is buoyant and fragments into rising clouds. This previously unrecognized mixing mechanism resolves the problem of 3He overproduction in low mass stars.
Credit: Lawrence Livermore National Laboratories

An apparent discrepancy in the Big Bang theory of the universe's evolution has been reconciled by astrophysicists examining the movement of gases in stars.

Professor John Lattanzio from Monash's School of Mathematical Sciences and Director of the Centre for Stellar and Planetary Astrophysics said the confusion surrounding the Big Bang revolved around the amount of the gas Helium 3 in the universe.

"The Big Bang theory predicts a certain amount of Helium 3 in the universe," Professor Lattanzio said. "The trouble is, low mass stars (about one to two times the size of our sun) also make Helium 3 as a side product of burning the hydrogen in their cores.

"It's been thought that when the star becomes a giant it mixes the helium 3 to its surface and, near the end of its life, spews the helium 3 into space just before it becomes a planetary nebula.

"But there are inconsistencies with the amount of Helium 3 predicted to be in the universe and the amount that's actually there; there's much less than expected."

Some scientists have theorised that the rapid rotation of low mass stars destroys the helium 3 they produce. But computer models that have included this rotation, while showing some destruction of helium 3, have not been able to reconcile the Big Bang theory.

Professor Lattanzio, in collaboration with Dr Peter Eggleton and Dr David Dearborn from the Lawrence Livermore National Laboratories in the US, ran 3D computer models of a red giant's life on some of the world's fastest computers to investigate whether there was some sort of gaseous mixing occurring in stars that destroyed Helium 3.

Their findings have been published in today's issue of the international journal Science.

Near the end of a star's life there is a 'core flash' and it was at around this time that the computer models revealed a small instability in the movement of the gases in the star. "When we looked at this in 3D we found this hydrodynamic instability caused mixing and destroyed the helium 3 so that none was released into space," Professor Lattanzio said.

"This apparent problem with the Big Bang has been solved -- the helium 3 in the universe comes from the Big Bang and low mass stars, although they produce helium 3, do not release any into the universe because they destroy it."


Story Source:

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


Cite This Page:

Monash University. "Big Bang Theory Saved." ScienceDaily. ScienceDaily, 27 October 2006. <www.sciencedaily.com/releases/2006/10/061026185625.htm>.
Monash University. (2006, October 27). Big Bang Theory Saved. ScienceDaily. Retrieved July 27, 2014 from www.sciencedaily.com/releases/2006/10/061026185625.htm
Monash University. "Big Bang Theory Saved." ScienceDaily. www.sciencedaily.com/releases/2006/10/061026185625.htm (accessed July 27, 2014).

Share This




More Space & Time News

Sunday, July 27, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

This Week @ NASA, July 25, 2014

This Week @ NASA, July 25, 2014

NASA (July 25, 2014) Apollo 11 celebration, Next Giant Leap anticipation, ISS astronauts appear in the House and more... Video provided by NASA
Powered by NewsLook.com
Space to Ground: Coming and Going

Space to Ground: Coming and Going

NASA (July 25, 2014) One station cargo ship leaves, another arrives, aquatic research and commercial spinoffs. Questions or comments? Use #spacetoground to talk to us. Video provided by NASA
Powered by NewsLook.com
How A Solar Flare Could Have Wrecked Earth's Electronics

How A Solar Flare Could Have Wrecked Earth's Electronics

Newsy (July 25, 2014) Researchers say if Earth had been a week earlier in its orbit around the sun, it would have taken a direct hit from a 2012 coronal mass ejection. Video provided by Newsy
Powered by NewsLook.com
Raw: ISS Cargo Ship Launches in Kazakhstan

Raw: ISS Cargo Ship Launches in Kazakhstan

AP (July 23, 2014) The Progress 56 cargo ship launched from the Baikonur Cosmodrome in Kazakhstan Wednesday. NASA says it will deliver cargo and crew supplies to the International Space Station. (July 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:
from the past week

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