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.

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 July 24, 2014 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 July 24, 2014).

Share This




More Space & Time News

Thursday, July 24, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Raw: Cargo Craft Undocks from Space Station

Raw: Cargo Craft Undocks from Space Station

AP (July 22, 2014) A Russian Soyuz cargo-carrying spacecraft undocked from the International Space Station on Monday. The craft is due to undergo about ten days of engineering tests before it burns up in the Earth's atmosphere. (July 22) Video provided by AP
Powered by NewsLook.com
NASA Ceremony Honors Moon Walker Neil Armstrong

NASA Ceremony Honors Moon Walker Neil Armstrong

AP (July 21, 2014) NASA honored one of its most famous astronauts Monday by renaming a historic building at the Kennedy Space Center in Florida. It now bears the name of Neil Armstrong, the first man to walk on the moon. (July 21) Video provided by AP
Powered by NewsLook.com
Neil Armstrong's Post-Apollo 11 Life

Neil Armstrong's Post-Apollo 11 Life

Newsy (July 19, 2014) Neil Armstrong gained international fame after becoming the first man to walk on the moon in 1969. But what was his life like after the historic trip? Video provided by Newsy
Powered by NewsLook.com
This Week @ NASA, July 18, 2014

This Week @ NASA, July 18, 2014

NASA (July 18, 2014) Apollo 11 yesterday, Next Giant Leap tomorrow, Science instruments for Europa mission, and more... Video provided by NASA
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