Nav: Home

How solar prominences vibrate

June 07, 2018

When we look at the surface of the Sun the solar prominences are seen as dark filaments that populate the disk or as a blaze of plasma above it. Solar prominences are very dense plasma structures that levitate in the solar atmosphere. It is generally believed that the star's magnetic field supports them so that they do not fall on the surface due to their own weight. These magnetic structures can accumulate a large amount of energy that, when released, produces eruptions ejecting the prominence material into the interplanetary space.

Manuel Luna, researcher at the IAC and the ULL, leads the team that has cataloged about 200 solar prominence oscillations detected in the first half of 2014. This analysis, published today in The Astrophysical Journal Supplement Series, has served to verify that almost half of these events have been of large-amplitude. That is, oscillations with speeds between 10 km/s (36000 km/h) and 100 km/s. It has also been proven that these large-amplitude events are more common than previously thought.

The project is part of an international collaboration that began in 2015 through the International Space Science Institute (ISSI) and also the NASA project for the study of this type of oscillations.

Thanks to this compilation, a large variety of events have been found and it has been determined that, in many cases, the oscillations are produced by nearby flares. That is, by the sudden release of energy in the solar atmosphere.

With the collected data, a statistical study of the properties of the oscillations has been carried out. These movements consist of a cyclic movement of the prominences between two positions. It has been seen in it, that the oscillations (vibrations) have a period of approximately one hour. These periods are a characteristic of the prominences and reveal fundamental properties of their magnetic structure and the distribution of their mass. In addition, the oscillations show a large damping, or what is the same the vibration is reduced considerably after few cycles of oscillation. It is unknown why most of the protuberances oscillate with a period of one hour or why their movement is damped so quickly, therefore it will be necessary to continue investigating.

The data suggest that "the direction of movement of the oscillations forms an angle of about 27 degrees with the main axis of the prominence," Luna explains. He adds: "This direction coincides with the previous estimates of the orientation of the magnetic field." In addition, using seismological techniques, researchers have been able to deduce details about the geometry and intensity of the magnetic field that supports the prominences.

This study opens a new window to the investigation of the structure of the solar prominences and to the mechanisms that eventually destabilize them producing their eruption. In the future, the authors want to extend this analysis to an entire solar cycle to understand the evolution of these structures over the 11 years it lasts. To achieve this, artificial intelligence and big-data processing techniques will have to be applied.
-end-


Instituto de Astrofísica de Canarias (IAC)

Related Magnetic Field Articles:

Understanding stars: How tornado-shaped flow in a dynamo strengthens the magnetic field
A new simulation based on the von-Kármán-Sodium (VKS) dynamo experiment takes a closer look at how the liquid vortex created by the device generates a magnetic field.
'Quartz' crystals at the Earth's core power its magnetic field
Scientists at the Earth-Life Science Institute at the Tokyo Institute of Technology report in Nature (Fen.
Brightest neutron star yet has a multipolar magnetic field
Scientists have identified a neutron star that is consuming material so fast it emits more x-rays than any other.
Confirmation of Wendelstein 7-X magnetic field
Physicist Sam Lazerson of the US Department of Energy's Princeton Plasma Physics Laboratory has teamed with German scientists to confirm that the Wendelstein 7-X fusion energy device called a stellarator in Greifswald, Germany, produces high-quality magnetic fields that are consistent with their complex design.
High-precision magnetic field sensing
Scientists have developed a highly sensitive sensor to detect tiny changes in strong magnetic fields.
Brilliant burst in space reveals universe's magnetic field
Scientists have detected the brightest fast burst of radio waves in space to date -- locating the source of the event with more precision than previous efforts.
Optical magnetic field sensor can detect signals from the nervous system
The human body is controlled by electrical impulses in the brain, the heart and nervous system.
What did Earth's ancient magnetic field look like?
New work from Carnegie's Peter Driscoll suggests Earth's ancient magnetic field was significantly different than the present day field, originating from several poles rather than the familiar two.
Just what sustains Earth's magnetic field anyway?
Earth's magnetic field shields us from deadly cosmic radiation, and without it, life as we know it could not exist here.
Ironing out the mystery of Earth's magnetic field
The Earth's magnetic field has been existing for at least 3.4 billion years thanks to the low heat conduction capability of iron in the planet's core.

Related Magnetic Field Reading:

Power Tools for Health: How Pulsed Magnetic Fields (Pemfs) Help You
by Msc William Pawluk MD (Author), Caitlin Layne (Author)

Power tools revolutionized the building of your family home.
Now they will revolutionize your health.

Power Tools for Health will teach you to how to:
- treat new or chronic health conditions like pain, anxiety, insomnia, diabetes and injuries
- avoid annoying or potentially harmful side effects from pharmaceuticals or other treatments
- enhance and accelerate recovery from surgery

Research shows PEMFs accelerate the healing of almost any cell, tissue, organ, or condition.
Unlike much of modern medicine, which mostly focuses on symptom... View Details


Know Your Magnetic Field: Change Your Thinking, Change Your Life.
by William E. Gray (Author)

“We mortals operate on wave lengths from the Universal, the Trinity; these are our life waves. They are distributed, one wave from each of the ruling suns. Each of our waves is on a set length or frequency; the blending of the three waves is the Power. This sets the pattern of our individual frequency. It is the source of our personality, our identity and it is as distinct and individual as our own finger-prints. “On the strength of our wave we, similar to a planet, operate by our magnetic field through the medium and receive the knowledge we need from the vast pool of wisdom. It is... View Details


Magnetic Field(s)
by Ron Loewinsohn (Author), Steve Erickson (Preface)

Organized around the idea that "you can't know what a magnetic field is like unless you're inside of it, " Ron Loewinsohn's first novel opens from the disturbing perspective of a burglar in the midst of a robbery and travels through the thoughts and experiences (both real and imaginary) of a group of characters whose lives are connected both coincidentally and intimately. All of the characters have a common desire to imagine and invent rather horrifying stories about the lives of people around them. As the novel develops, certain phrasings and images recur improbably, drawing the reader into... View Details


NOW 2 kNOW Electro-Magnetic Fields
by Dr. T G D'Alberto (Author)

You're taking a challenging EM Fields course or simimlar while balancing umpteen other classes and maybe even a job. Your chief concern is to figure out, in the shortest time possible, how to successfully do the homework and exam problems. So, let’s get to it. The main stumbling blocks that trip up most students are conquered by a three-time teaching assistant to this course at Cornell. Get the help those students got! From a review of vector calculus to descriptions of the physics behind the math to detailed examples, this book is a must-have companion to any course addressing EM Fields.... View Details


Magnetic Fields: Expanding American Abstraction, 1960s to Today
by Valerie Cassel Oliver (Author), Lowery Stokes Sims (Author), Erin Dziedzic (Editor), Melissa Messina (Editor)

In the history of American art, the contributions of African American artists to the development of abstraction have been largely overlooked.

Magnetic Fields aims to change this perspective by focusing on nonrepresentational work by women artists of color, presenting a more complete presentation of American abstraction than has previously been offered.

Intergenerational in scope, Magnetic Fields includes more than 20 artists born between 1891 and 1981, among them Lilian Thomas Burwell, Mildred Thompson, Candida Alvarez, Betty Blayton, Nanette... View Details


The Magnetic Fields
by André Breton (Author), Philippe Soupault (Author), David Gascoyne (Translator)

tr David Gascoyne View Details


Magnetic Fields: A Comprehensive Theoretical Treatise for Practical Use
by Heinz E. Knoepfel (Author)

A unique resource for physicists and engineers working with magnetic fields
An understanding of magnetic phenomena is essential for anyone working on the practical application of electromagnetic theory. Magnetic Fields: A Comprehensive Theoretical Treatise for Practical Use provides physicists and engineers with a thorough treatment of the magnetic aspects of classical electromagnetic theory, focusing on key issues and problems arising in the generation and application of magnetic fields. From magnetic potentials and diffusion phenomena to magnetohydrodynamics and properties of... View Details


Reconnection of Magnetic Fields: Magnetohydrodynamics and Collisionless Theory and Observations
by J. Birn (Editor), E. R. Priest (Editor)

The reconnection of magnetic fields is one of the most fascinating processes in plasma physics, responsible for phenomena such as solar flares and magnetospheric substorms. The concept of reconnection has developed through recent advances in exploring the magnetospheres of the Sun and Earth through theory, computer simulations and spacecraft observations. The great challenge in understanding it stems from balancing the large volumes of plasma and magnetic fields involved with the energy release with the physical mechanism which relies on the strongly localized behavior of charged particles.... View Details


Magnetic Fields' 69 Love Songs: A Field Guide (33 1/3)
by LD Beghtol (Author), Ken Emerson (Introduction)

A fully illustrated oral history of the Magnetic Fields' 1999 triple album, 69 Love Songs - an album that was afforded "classic" status by many almost as soon as it was released. LD Beghtol's book is chatty, incestuous, funny, dark, digressive, sexy, maddening, and delightful in equal measures. It documents a vital and influential scene from the inside, involving ukuleles and tears, citations and footnotes, analogue drum machines, and floods of cognac. Oh, and a crossword puzzle too.



The centre of the book is the secret history of these tuneful, acerbic, and sometimes... View Details


The Automatic Message, the Magnetic Fields, the Immaculate Conception (Atlas Anti-Classics)
by Andre Breton (Author), Philippe Soupault (Author), Paul Eluard (Author), David Gascoyne (Translator), Antony Melville (Translator), Jon Graham (Translator)

This book collects together the two most vital "automatic" texts of Surrealism. Breton’s prefatory essay The Automatic Message relates this technique to the underlying concepts and aesthetic of the Surrealist movement.

The Magnetic Fields (1919) was the first work of literary Surrealism and is thus one of the foundations of modern European thought and writing. This authorised translation is by the poet David Gascoyne, himself a member of the group and a friend of both authors.

The Immaculate Conception (1930) traces the interior and exterior life of man from Conception and... View Details

Best Science Podcasts 2018

We have hand picked the best science podcasts for 2018. Sit back and enjoy new science podcasts updated daily from your favorite science news services and scientists.
Now Playing: TED Radio Hour

The Person You Become
Over the course of our lives, we shed parts of our old selves, embrace new ones, and redefine who we are. This hour, TED speakers explore ideas about the experiences that shape the person we become. Guests include aerobatics pilot and public speaker Janine Shepherd, writers Roxane Gay and Taiye Selasi, activist Jackson Bird, and fashion executive Kaustav Dey.
Now Playing: Science for the People

#479 Garden of Marvels (Rebroadcast)
This week we're learning about botany and the colorful science of gardening. Author Ruth Kassinger joins us to discuss her book "A Garden of Marvels: How We Discovered that Flowers Have Sex, Leaves Eat Air, and Other Secrets of the Way Plants Work." And we'll speak to NASA researcher Gioia Massa about her work to solve the technical challenges of gardening in space.