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: 15

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

Return of A.G.!

Posted by Marcus Haynes on June 26, 2017 at 1:27pm 2 Comments

The second book in the Elemental series, Return of A.G., will hit shelves and stores on July 26, 2017! It's been two years since the Elementals and Don defeated the evil android A.G. and put a stop to the Pru Empire's return. Now, De, M, Rod, Mo, and the new Elementals Jas, Lucas, Kiara, Jay, and Alex are all working together to keep their world safe. Their first order of business? Finding Samantha and Kevon Prudence, the two who made A.G. into a literal killing machine in the first place. The nine Elementals will have to travel to new locations and meet new people in order to outsmart the Prudence siblings and keep them from enacting their worst plan yet: bringing back A.G.

The book may not be coming out until 7/26, but you can reserve your copy TODAY by…

Continue

UGI PDF SALE!!!!!

Posted by Slim Jim Longfoot on June 24, 2017 at 10:56am 0 Comments

Hey BSFS....got a great deal going on here!!! Two books (pdf) for only ONE DOLLAR PER BOOK!!! Have a personal goal to meet by this Friday....so whether or not you decide to get a copy yourself......or just share this blog, I would be grateful. And for an extra bonus, if you purchase both books and share this post, I will draw a black and white headshot of your OC!!!

Transitions...

Posted by Reginald L. Goodwin on June 20, 2017 at 8:47am 0 Comments

a
Image Source: JSNN.NCAT.UNCG.edu

Topics: Education, Jobs, Nanotechnology, STEM

I shifted my posting schedule as I am currently inundated with tape, packing material and moving boxes: LOTS of moving boxes. I have 50 free boxes from the…
Continue

Community College Innovation Challenge...

Posted by Reginald L. Goodwin on June 19, 2017 at 1:55pm 0 Comments

Using laboratory experiments, first place awardee, Del Mar College, Texas, demonstrated that their product, EnteroSword, could offer another solution to the spread of antibiotic-resistant bacteria. Here, team member Daniel Nasr Azadani, demonstrates how EnteroSword fights antibiotic resistant bacteria. Credit: NSF/Bill Petros Photography

Topics: Education, Jobs, STEM…

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

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