Featured Research

from universities, journals, and other organizations

Astrophysicists Listen To Loops Shivering On The Sun

Date:
February 18, 2004
Source:
University Of Warwick
Summary:
You would imagine that a 500,000 kilometre long arch of super heated plasma releasing energy equal to the simultaneous explosion of 40 billion Hiroshima atomic bombs would be as easy to "hear" as it is to "see" – but it's not.

Megaflare.
Credit: Image courtesy of University Of Warwick.

You would imagine that a 500,000 kilometre long arch of super heated plasma releasing energy equal to the simultaneous explosion of 40 billion Hiroshima atomic bombs would be as easy to "hear" as it is to "see" – but it's not. Astrophysicists have long thought about using the acoustic waves in these flares to understand more about these gigantic events, that can be dozens of times bigger than the Earth, but have been unable to use effectively up till now. Now researchers at the University of Warwick, and Lockheed Martin's Solar and Astrophysics lab in Palo Alto, have found a way to "listen" to how these gigantic loops "shiver" - vastly increasing our ability to understand these huge events which are big enough to affect telecommunications, GPS satellites, and even energy supply lines.

Related Articles


Researchers at the University of Warwick and Lockheed Martin's Solar and Astrophysics lab in Palo Alto have found a way to spot and use an intense "shivering" of flaring loops to get a clear look at their structure. The closest analogy is the attack of shivering we suffer having a severe cold or fever. But, a flaring coronal loop suffers from the temperature up to tens of million degrees Kelvin. The University of Warwick led team have found that they can use radio and X-ray observation to spot a shiver or oscillation in the really high temperature loops (around 20 million degrees Kelvin) that behaves like an acoustic (sound) wave.

Previously researchers had noted these acoustic oscillations but had paid little attention to them as they were convinced that they dissipated quickly and were therefore of little use. However University of Warwick researcher Dr Valery Nakariakov and his team have been able to prove that these oscillations do not dissipate quickly and can in fact be sustained over a period from 10 seconds to 5 minutes in length. This means the data from these oscillations is much more useful than previously thought and can now actually be used, in combination with other observations, to calculate both the temperature and the length of each of these individual great loops of plasma. These results are just one of the successes of a new method for remote diagnostic of astrophysical plasma by University Warwick physicists known as MHD seismology.

###

Note for editors: The team's paper is called "Acoustic Oscillations in Solar and Stellar Flaring Loops" and will be published in a forthcoming edition of "Astronomy and Astrophysics"


Story Source:

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


Cite This Page:

University Of Warwick. "Astrophysicists Listen To Loops Shivering On The Sun." ScienceDaily. ScienceDaily, 18 February 2004. <www.sciencedaily.com/releases/2004/02/040218075345.htm>.
University Of Warwick. (2004, February 18). Astrophysicists Listen To Loops Shivering On The Sun. ScienceDaily. Retrieved January 24, 2015 from www.sciencedaily.com/releases/2004/02/040218075345.htm
University Of Warwick. "Astrophysicists Listen To Loops Shivering On The Sun." ScienceDaily. www.sciencedaily.com/releases/2004/02/040218075345.htm (accessed January 24, 2015).

Share This


More From ScienceDaily



More Space & Time News

Saturday, January 24, 2015

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Rosetta Captures Stunning Views, Diverse Data Of Comet 67P

Rosetta Captures Stunning Views, Diverse Data Of Comet 67P

Newsy (Jan. 23, 2015) The first images of the European Space Agency&apos;s Rosetta probe comet orbit could provide clues about its origin and how it got its unique shape. Video provided by Newsy
Powered by NewsLook.com
New Planets Could Be Lurking Far Beyond Neptune

New Planets Could Be Lurking Far Beyond Neptune

Newsy (Jan. 21, 2015) Scientists say planets located beyond Neptune could be altering the orbits of objects in the farthest reaches of our solar system. Video provided by Newsy
Powered by NewsLook.com
130,000 Pages Of UFO Investigation Docs Now Online

130,000 Pages Of UFO Investigation Docs Now Online

Newsy (Jan. 20, 2015) "UFO enthusiast" John Greenewald says he&apos;s spent 20 years collecting these docs, and believes there&apos;s a cover-up going on. Video provided by Newsy
Powered by NewsLook.com
US Navy Satellite Blasts Off

US Navy Satellite Blasts Off

Reuters - News Video Online (Jan. 20, 2015) A rocket carrying a new U.S. navy satellite that&apos;s designed to improve communications for forces on the move, successfully lifts off from Florida. Yiming Woo reports. Video provided by Reuters
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:

Strange & Offbeat Stories


Space & Time

Matter & Energy

Computers & Math

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