Free Newsletters - Space News - Defense Alert - Environment Report - Energy Monitor
. 24/7 Space News .




TIME AND SPACE
Magnetic fields created before the first stars
by Staff Writers
Bochum, Germany (SPX) Jan 04, 2013


illustration only

Magnets have practically become everyday objects. Earlier on, however, the universe consisted only of nonmagnetic elements and particles. Just how the magnetic forces came into existence has been researched by Prof. Dr. Reinhard Schlickeiser at the Institute of Theoretical Physics of the Ruhr-Universitat Bochum.

In the journal Physical Review Letters, he describes a new mechanism for the magnetisation of the universe even before the emergence of the first stars.

No permanent magnets in the early universe
Before the formation of the first stars, the luminous matter consisted only of a fully ionised gas of protons, electrons, helium nuclei and lithium nuclei which were produced during the Big Bang.

"All higher metals, for example, magnetic iron could, according to today's conception, only be formed in the inside of stars", says Reinhard Schlickeiser.

"In early times therefore, there were no permanent magnets in the Universe."

The parameters that describe the state of a gas are, however, not constant. Density and pressure, as well as electric and magnetic fields fluctuate around certain mean values.

As a result of this fluctuation, at certain points in the plasma weak magnetic fields formed - so-called random fields. How strong these fields are in a fully ionised plasma of protons and electrons, has now been calculated by Prof.

Schlickeiser, specifically for the gas densities and temperatures that occurred in the plasmas of the early universe.

Weak magnetic fields with large volumes
The result: the magnetic fields fluctuate depending on their position in the plasma, however, regardless of time - unlike, for example, electromagnetic waves such as light waves, which fluctuate over time.

Everywhere in the luminous gas of the early universe there was a magnetic field with a strength of 10^-20 Tesla, i.e. 10 sextillionth of a Tesla.

By comparison, the earth's magnetic field has a strength of 30 millionths of a Tesla. In MRI scanners, field strengths of three Tesla are now usual.

The magnetic field in the plasma of the early universe was thus very weak, but it covered almost 100 percent of the plasma volume.

Interaction of thermal shock waves and magnetic fields
Stellar winds or supernova explosions of the first massive stars generated shock waves that compressed the magnetic random fields in certain areas.

In this way, the fields were strengthened and aligned on a wide-scale. Ultimately, the magnetic force was so strong that it in turn influenced the shock waves.

"This explains the balance often observed between magnetic forces and thermal gas pressure in cosmic objects", says Prof. Schlickeiser.

The calculations show that all fully ionised gases in the early universe were weakly magnetised. Magnetic fields therefore existed even before the first stars.

Next, the Bochum physicist is set to examine how the weak magnetic fields affect temperature fluctuations in the cosmic background radiation.

R. Schlickeiser (2012): Cosmic magnetization: from spontaneously emitted aperiodic turbulent to ordered equipartition fields, Physical Review Letters, DOI: 10.1103/PhysRevLett.109.261101

.


Related Links
Ruhr-University Bochum
Understanding Time and Space






Comment on this article via your Facebook, Yahoo, AOL, Hotmail login.

Share this article via these popular social media networks
del.icio.usdel.icio.us DiggDigg RedditReddit GoogleGoogle




Memory Foam Mattress Review
Newsletters :: SpaceDaily :: SpaceWar :: TerraDaily :: Energy Daily
XML Feeds :: Space News :: Earth News :: War News :: Solar Energy News





TIME AND SPACE
NASA's Hubble Provides First Census of Galaxies Near Cosmic Dawn
Washington DC (SPX) Dec 24, 2012
Using NASA's Hubble Space Telescope, astronomers have uncovered a previously unseen population of seven primitive galaxies that formed more than 13 billion years ago, when the universe was less than 4 percent of its present age. The deepest images to date from Hubble yield the first statistically robust sample of galaxies that tells how abundant they were close to the era when galaxies first for ... read more


TIME AND SPACE
Russia designs manned lunar spacecraft

GRAIL Lunar Impact Site Named for Astronaut Sally Ride

NASA probes crash into the moon

No plans of sending an Indian on moon

TIME AND SPACE
Stanford researchers develop acrobatic space rovers to explore moons and asteroids

Researchers Identify Water Rich Meteorite Linked To Mars Crust

Mars meteorite has significant water

'Spiky' rovers could explore martian moon

TIME AND SPACE
Congress Approves Bill Supporting Human Space Exploration

China's Chengdu aiming to be world's next Silicon Valley

Satellite highs, suspension lows for Indian space sector in 2012

NASA's Destination Station Exhibit Opens In Mesa, Arizona

TIME AND SPACE
Mr Xi in Space

China plans manned space launch in 2013: state media

China to launch manned spacecraft

Tiangong 1 Parked And Waiting As Shenzhou 10 Mission Prep Continues

TIME AND SPACE
Station Crew Ringing in New Year

Expedition 34 Ready to Ring in New Year

New ISS crew docked at Space Station

Expedition 34 Spends Christmas in Space

TIME AND SPACE
CSF Applauds Passage Of Risk-Sharing Regime Extension For Launch Industry

Rokot Launch Set for January 15

Russian rocket launch rescheduled

Investigation into Proton Launch Anomaly Continues as Root Cause is being Evaluated

TIME AND SPACE
Billions and Billions of Planets

ALMA Shows How Young Star and Planets Grow Simultaneously

ALMA Sheds Light on Planet-Forming Gas Streams

A stray planet

TIME AND SPACE
COM DEV wins commercial contract from MacDonald Dettwiler and Associates

Thai 'scavengers club' turns trash to treasure

Malaysia convoy in Australia rare earth plant protest

All Systems Go for Highest Altitude Supercomputer




The content herein, unless otherwise known to be public domain, are Copyright 1995-2014 - Space Media Network. AFP, UPI and IANS news wire stories are copyright Agence France-Presse, United Press International and Indo-Asia News Service. ESA Portal Reports are copyright European Space Agency. All NASA sourced material is public domain. Additional copyrights may apply in whole or part to other bona fide parties. Advertising does not imply endorsement,agreement or approval of any opinions, statements or information provided by Space Media Network on any Web page published or hosted by Space Media Network. Privacy Statement