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




EXO WORLDS
Tuning Into ExoPlanet Radio
by Staff Writers
Moffett Field CA (SPX) Apr 25, 2011


The majority of exoplanets discovered thus far orbit close to their host stars. The new technique could help identify planets that orbit at greater distances. Image Credit: NASA, ESA, and P. McCullough (STScI)

Detecting exoplanets that orbit at large distances from their star remains a challenge for planet hunters. Now, scientists at the University of Leicester have shown that emissions from the radio aurora of planets like Jupiter should be detectable by radio telescopes such as LOFAR, which will be completed later this year. Dr. Jonathan Nichols presented results at the RAS National Astronomy Meeting in Llandudno, Wales, on Monday 18th April.

"This is the first study to predict the radio emissions by exoplanetary systems similar to those we find at Jupiter or Saturn. At both planets, we see radio waves associated with auroras generated by interactions with ionized gas escaping from the volcanic moons, Io and Enceladus. Our study shows that we could detect emissions from radio auroras from Jupiter-like systems orbiting at distances as far out as Pluto," said Nichols.

Of the hundreds of exoplanets that have been detected to date, less than 10% orbit at distances where we find the outer planets in our own Solar System. Most exoplanets have been found by the transit method, which detects a dimming in light as a planet moves in front of a star, or by looking for a wobble as a star is tugged by the gravity of an orbiting planet. With both these techniques, it is easiest to detect planets close in to the star and moving very quickly.

"Jupiter and Saturn take 12 and 30 years respectively to orbit the Sun, so you would have to be incredibly lucky or look for a very long time to spot them by a transit or a wobble," said Dr. Nichols.

Dr. Nichols examined how the radio emissions for Jupiter-like exoplanets would be affected by the rotation rate of the planet, the rate of plasma outflow from a moon, the orbital distance of the planet and the ultraviolet (UV) brightness of the parent star.

He found that, in many scenarios, exoplanets orbiting UV-bright stars between 1 and 50 Astronomical Units (AU) would generate enough radio power to be detectable from Earth. For the brightest stars and fastest spinning planets, the emissions would be detectable from systems 150 light-years away from Earth.

"In our Solar System, we have a stable system with outer gas giants and inner terrestrial planets, like Earth, where life has been able to evolve. Being able to detect Jupiter-like planets may help us find planetary systems like our own, with other planets that are capable of supporting life," said Dr. Nichols.

.


Related Links
University of Leicester
Lands Beyond Beyond - extra solar planets - news and science
Life Beyond Earth






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





EXO WORLDS
Radio signals could 'tag' distant planets
Leicester, England (UPI) Apr 19, 2011
British astronomers say the search for exoplanets outside our solar system could seek out radio "auroras" like ones detected on Jupiter and Saturn. Most exoplanets discovered to date orbit very close to their stars and are detected by the dimming of the star's light as the planet transits in front of it or by the wobble in the star's motion as it is tugged on by the planet's gravity. ... read more


EXO WORLDS
BRP To Contribute To Canadian Moon And Mars Exploration Programs

Naveen Jain Co-Founder And Chairman Of Moon Express

Project Morpheus To Begin Testing At NASA's Johnson Space Center

NASA Announces Winners Of 18th Annual Great Moonbuggy Race

EXO WORLDS
NASA Orbiter Reveals Big Changes in Mars' Atmosphere

Dry ice find hints Mars was a wetter place: study

A Tale Of Two Deserts

Mars Rover's 'Gagarin' Moment Applauded Exploration

EXO WORLDS
SpaceX Wins NASA Contract To Complete Development Of Successor To Space Shuttle

More Than Two Million First Orbits

Russians 'never ever did it in space': official

Iran To Put Monkey Into Orbit

EXO WORLDS
Asia's star ever brighter in space

What Future for Chang'e-2

China setting up new rocket production base

China's Tiangong-1 To Be Launched By Modified Long March II-F Rocket

EXO WORLDS
No ISS docking permission for SpaceX unless safety proven Says Roscosmos

Paparazzi In Space

CSA Celebrates A Decade Of Success With Canadarm2

Roberto Vittori's DAMA Mission To ISS

EXO WORLDS
Ariane Ariane 5 enjoys second successful launch for 2011

Ariane rocket launches two telecoms satellites

SpaceX aims to put man on Mars in 10-20 years

ULA Launches Fifth NRO Mission In Seven Months

EXO WORLDS
Tuning Into ExoPlanet Radio

The Shocking Environment Of Hot Jupiters

Radio signals could 'tag' distant planets

Titan-Like Exoplanets

EXO WORLDS
A scratched coating heals itself

Primordial fear: why radiation is so scary

Nintendo announces new console but profit dives

3-D towers of information double data storage areal density




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