The Sun as seen by the Solar Dynamics Observatory (Courtesy: Solar Dynamics Observatory/NASA)

Topics: Astrophysics, Heliophysics, NASA, Solar System

And in one post title, I've horribly dated myself again. Happy Friday, everyone!

Sunlight is slowing the rotation of the Sun’s outermost layers by stealing its angular momentum. That is the claim of researchers in the US and Brazil who have studied acoustic waves oscillating through the Sun’s visible surface – the photosphere – to determine how fast the Sun spins at certain depths.

It has been known since the 1980s that the outer 5% of the photosphere rotates more slowly than deeper layers. However, solar physicists do not understand why this slowdown occurs, its total extent and its effect on the Sun’s magnetic dynamo and solar wind.

To solve this puzzle a team led by Ian Cunnyngham and Jeff Kuhn of the Institute for Astronomy at the University of Hawaii has observed acoustic waves at the limb (edge) of the Sun’s disc using the Helioseismic and Magnetic Imager on NASA’s Solar Dynamics Observatory (SDO), which orbits Earth.

Bell ringing

The Sun is ringing like a bell as acoustic waves driven by turbulence crash through the plasma within its interior. The waves themselves, known as p-mode oscillations, have very low frequencies in the region of 3000 µHz and their harmonic patterns form the basis of helioseismology.

Cunnyngham and Kuhn’s team observed the oscillations at the solar limb, where the viewing angle makes it possible to determine how deep in the photosphere each oscillation is, allowing measurements of the rotation velocity at each depth. They found that the greatest amount of braking was occurring in the outer 70 km of the photosphere and that layers closest to the surface were rotating more slowly than deeper layers. This differential rotation could potentially twist localized magnetic field lines, affecting magnetic phenomena such as sunspots, active regions and even the formation of the solar wind.

Physics World: Photons are a drag on the Sun, Keith Cooper

Views: 14

Comment

You need to be a member of BlackScienceFictionSociety to add comments!

Join BlackScienceFictionSociety

Badge

Loading…

IMPORTANT ALERTS

ALERT! ALERT! ALERT! 

IF YOU ARE HAVING TROUBLE CHANGING YOUR PROFILE  PICTURE, SWITCH TO EITHER CHROME BROWSWER OR FIREFOX. THERE IS A KNOWN ISSUE WITH INTERNET EXPLORER THAT CAUSES TROUBLE CHANGING PICTURES.


PLEASE DO NOT SIGN IN WITH FACEBOOK IF YOU ALREADY HAVE AN ACCOUNT. YOU WILL CREATE A DUPLICATE THAT WILL NOT HAVE YOUR INFO CONNECTED. THANKS

NO SPAMMING

Please do not greet everyone on the site with large images and/or announcements of your book or business. Yes, you want to tell the world, but learn the fine art of subtlety. We have lost numerous members because of the amount of 'friend' mail they instantly receive. This Hurts Everyone.

Also, DO NOT post the same information multiple times throughout the site. It will be deleted without notice.

 

Spam is unsolicited advertising, whether it is posted as comments on other members' pages or is emailed for marketing purposes.

 

Please be considerate. Post your advertisement in the proper Articles/Forum or Group. There are inexpensive marketing channels that reach every member for just $25 on the Advertising tab. You can post your information on your profile and even update your blog as often as you like.

 

We are not into censorship, so please don't make us ask you to leave. Be kind and unselfish - don't spam.

 

Your Account Will Be Deleted Without Warning For Spam.

 

Blog Posts

Guest Authors Welcome at SpecFics.com

Posted by Tonya R. Moore on March 24, 2017 at 9:00am 0 Comments

Dust off those old specfic flashfics and short stories you’ve got lying around.

Spec Fics is now accepting submissions from Guest Authors who would like to showcase their overlooked works on our website. To that end, we are now accepting short works of fiction to be made available for free online reading.

We welcome speculative flash fiction and short stories. All sub-genres that fit under the umbrella of speculative fiction are welcome: scifi, horror, dark fantasy, steampunk—you name it.

For information on how to submit your story, here are the Submission Guidelines:

 

Submission Guidelines

Email your story as an attachment to tonyamoore@outlook.com.

Your story should be in RTF (Rich Text Format) or DOCX (Word) format. Be…

Continue

Given The Boot...

Posted by Reginald L. Goodwin on March 24, 2017 at 8:06am 0 Comments

This Hubble Space Telescope image shows a quasar (bright object at center) and its host galaxy, 3C186 (the diffuse object behind it). Scientists think 3C186’s central black hole was ejected from the galaxy’s core by gravitational waves. Credit: NASA, ESA, and M. Chiaberge (STScI/ESA)
Topics: Black Holes, Cosmology, General Relativity, Gravitational Waves…

Continue

Transparency...

Posted by Reginald L. Goodwin on March 23, 2017 at 5:30am 0 Comments

Does the brain behave like a spin glass? (Courtesy: Shutterstock / Phonlamai Photo)

Topics: Biology, Biophysics, Neuroscience, Particle Physics

Spin-glass-like states that occur in models of neural networks can provide important insights into states of low and high brain activity…
Continue

Mars, Lava and Dinosaurs...

Posted by Reginald L. Goodwin on March 22, 2017 at 10:26am 0 Comments

This digital-image mosaic of Mars' Tharsis plateau shows the extinct volcano Arsia Mons. It was assembled from images that the Viking 1 Orbiter took during its 1976-1980 working life at Mars. Credit: NASA/JPL/USGS


Topics: Mars, NASA, Planetary Science, Space Exploration…

Continue

The Digital Brothers Multimedia

The Digital Brothers
Our goal is to provide cost effective technological solutions for home, small and big business. After over 20 years of service working in this field, we decided to utilize our talents to develop and cultivate our own vision to benefit the community.
2D & 3D Animation
Graphic & Web Design
Photo & Video
Multimedia Development
Online & Print Marketing

Contact Us Today To Assist In Your Business Success
Website: www.TheDigitalBrothers.com
Email: info@thedigitalbrothers.com

SKYCITY TALKRADIO

FREE SEMINAREnigma #1 - Missing Pieces

GET IT NOW!
Enigma #1 - Missing Pieces
In a post apocalyptic world, Two investigators (James and Brooks) are assign to a murder investigation that leads to more questions than what they bargain for.
https://www.comixology.com/comic-reader/42138/205794

THE UNDERGROUND BY ROXANNE BLAND

Life as alpha of a werewolf pack is anything but predictable. But even Parker Berenson is surprised by the latest twist: he’s fallen in love with a space alien. Problem is, he suspects Melera, his sexy new flame, might be the serial killer terrorizing Seattle. Or maybe she isn’t. After all, just because she’s an interstellar assassin doesn’t mean she’s guilty.

http://blackrosepress.com/

© 2017   Created by Jarvis Sheffield - Admin.   Powered by

Badges  |  Report an Issue  |  Terms of Service