Subscribe free to our newsletters via your
. 24/7 Space News .




STELLAR CHEMISTRY
Distant radio galaxies reveal hidden structures right above our heads
by Staff Writers
Toronto, Canada (SPX) Jun 03, 2015


As light from a galaxy passes through layers in the Earth's magnetosphere, the light's path - and hence the galaxy's apparent position - is altered by variations in density in the layers. The effect is like looking up from the bottom of a swimming pool at the distortions caused by waves on the surface.

By observing galaxies billions of light-years away, a team of astronomers has detected tube-like structures mere hundreds of kilometres above the Earth's surface.

"For over 60 years, scientists believed these structures existed but by imaging them for the first time, we've provided visual evidence that they are really there," said Cleo Loi of the ARC Centre of Excellence for All-sky Astrophysics (CAASTRO) at the University of Sydney and lead author of a paper published in Geophysical Research Letters last week.

The astronomers - including Prof. Bryan Gaensler, former director of CAASTRO and the current director of the Dunlap Institute at the University of Toronto - made their observations with the Murchison Widefield Array. The MWA is a radio telescope in Western Australia designed to observe the early Universe and distant galaxies, as well as stars and nebulae within our own Milky Way Galaxy.

As light from a galaxy passes through layers in the Earth's magnetosphere, the light's path - and hence the galaxy's apparent position - is altered by variations in density in the layers. The effect is like looking up from the bottom of a swimming pool at the distortions caused by waves on the surface.

Mapping the variations in the positions of multiple radio sources over the course of a night revealed the shape and dimensions of the tube structures. As well, by exploiting the MWA's rapid "snapshot" capabilities, Loi and her colleagues created a movie - effectively capturing the real-time motions of the tubes.

According to Gaensler, "We were trying to understand if the motions of the ionosphere were random or had a pattern, both to see if the MWA could be used to study the ionosphere, and also to be able to correct for its effect and study the sources behind it."

In addition, the astronomers made their observations using the east and west halves of the MWA's array of antennas as separate instruments. "This is like turning the telescope into a pair of eyes, and by doing that we were able to probe the 3D nature of these structures and watch them move around," said Loi.

The observations revealed that the tubes above the MWA are 500 to 700 km above the surface and are aligned with the Earth's magnetic field. The tubes are at an angle to the surface because they follow the field as it angles down into the planet.

The insight into our own world is just one part of the accomplishment. According to Gaensler, "This work highlights the new frontier that the MWA is opening up. By operating at low radio frequencies and covering such an enormous field of view, we can study subtle and complicated processes that we had only ever caught fleeting glimpses of previously."

Thanks for being here;
We need your help. The SpaceDaily news network continues to grow but revenues have never been harder to maintain.

With the rise of Ad Blockers, and Facebook - our traditional revenue sources via quality network advertising continues to decline. And unlike so many other news sites, we don't have a paywall - with those annoying usernames and passwords.

Our news coverage takes time and effort to publish 365 days a year.

If you find our news sites informative and useful then please consider becoming a regular supporter or for now make a one off contribution.

SpaceDaily Contributor
$5 Billed Once


credit card or paypal
SpaceDaily Monthly Supporter
$5 Billed Monthly


paypal only

.


Related Links
Dunlap Institute for Astronomy and Astrophysics
Stellar Chemistry, The Universe And All Within It






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





STELLAR CHEMISTRY
Merging galaxies break radio silence
Paris (ESA) May 31, 2015
In the most extensive survey of its kind ever conducted, a team of scientists have found an unambiguous link between the presence of supermassive black holes that power high-speed, radio-signal-emitting jets and the merger history of their host galaxies. Almost all of the galaxies hosting these jets were found to be merging with another galaxy, or to have done so recently. The results lend ... read more


STELLAR CHEMISTRY
Crashing comets may explain mysterious lunar swirls

Google Lunar X-Prize meets Yoda

China, Russia plan joint landing on the Moon

NASA's LRO Moves Closer to the Lunar Surface

STELLAR CHEMISTRY
United Arab Emirates Hopes to Reach Mars by2021

NASA Begins Testing Next Mars Lander Insight

The Supreme Council of Parachute Experts

Science Drives NASA's Journey to Mars

STELLAR CHEMISTRY
LightSail reestablishes communication with mission control

US Lawmakers Pass Bill for Space Mining in the Future

NASA pushes flying saucer parachute test to Thursday

NASA's Exploration Plans Include Living Off the Land

STELLAR CHEMISTRY
China Plans First Ever Landing On The Lunar Far Side

China ranked 4th among world space powers

3D printer making Chinese space suit parts

Xinhua Insight: How China joins space club?

STELLAR CHEMISTRY
NASA Delays Approval on International Space Station Projects

Space age mice are thin-skinned

Space Station remodelling

NASA Begins Major Reconfiguration of International Space Station

STELLAR CHEMISTRY
Recent Proton loss to push up launch costs warns manufacturer

Air Force Certifies SpaceX for National Security Space Missions

SpaceX cleared for US military launches

Ariane 5's second launch of 2015

STELLAR CHEMISTRY
Astronomers Discover a Young Solar System Around a Nearby Star

Circular orbits identified for small exoplanets

Weather forecasts for planets beyond our solar system

Astrophysicists offer proof that famous image shows forming planets

STELLAR CHEMISTRY
MUOS-3 communications satellite completes in-orbit testing

Patent for Navy small space debris tracker granted

3D printers get Ugandan amputees back on their feet

Saving money and the environment with 3-D printing




The content herein, unless otherwise known to be public domain, are Copyright 1995-2014 - Space Media Network. All websites are published in Australia and are solely subject to Australian law and governed by Fair Use principals for news reporting and research purposes. AFP, UPI and IANS news wire stories are copyright Agence France-Presse, United Press International and Indo-Asia News Service. ESA news 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 All images and articles appearing on Space Media Network have been edited or digitally altered in some way. Any requests to remove copyright material will be acted upon in a timely and appropriate manner. Any attempt to extort money from Space Media Network will be ignored and reported to Australian Law Enforcement Agencies as a potential case of financial fraud involving the use of a telephonic carriage device or postal service.