E-Print Archive

There are 3950 abstracts currently viewable.


Search:

Advanced Search
Options
Main Page Add New E-Print Submitter
Information
Feedback
News Help/FAQ About Preferences
Manage Key Phrase
Notification
Direct Imaging by SDO/AIA of Quasi-periodic Propagating Fast Mode Magnetosonic Waves Propagating of ~2000 km s-1 in the Low Solar Corona View all abstracts by submitter

Wei Liu   Submitted: 2011-06-15 12:22

Quasi-periodic, propagating fast mode magnetosonic waves in the corona weredifficult to observe in the past due to relatively low instrument cadences. Wereport here evidence of such waves directly imaged in EUV by the new SDO AIAinstrument. In the 2010 August 1 C3.2 flare/CME event, we find arc-shaped wavetrains of 1-5% intensity variations (lifetime ~200 s) that emanate near theflare kernel and propagate outward up to ~400 Mm along a funnel of coronalloops. Sinusoidal fits to a typical wave train indicate a phase velocity of2200 ± 130 km s-1. Similar waves propagating in opposite directions areobserved in closed loops between two flare ribbons. In the k-omega diagramof the Fourier wave power, we find a bright ridge that represents thedispersion relation and can be well fitted with a straight line passing throughthe origin. This k-omega ridge shows a broad frequency distribution withindicative power at 5.5, 14.5, and 25.1 mHz. The strongest signal at 5.5 mHz(period 181 s) temporally coincides with quasi-periodic pulsations of theflare, suggesting a common origin. The instantaneous wave energy flux of(0.1-2.6) imes 107 ergs/cm^2/s estimated at the coronal base is comparableto the steady-state heating requirement of active region loops.

Authors: Wei Liu, Alan M. Title, Junwei Zhao, Leon Ofman, Carolus J. Schrijver, Markus J. Aschwanden, Bart De Pontieu, and Theodore D. Tarbell
Projects: SDO-AIA

Publication Status: Accepted by ApJ Letters (AAS/SPD Press Release, Las Cruces, June 15, http://www.lmsal.com/press/apjl2011_magnetosonic)
Last Modified: 2011-06-18 06:54
Go to main E-Print page  Solar Dynamics Observatory discovers thin high temperature strands in coronal active regions  Major electron events and coronal magnetic configurations of the related solar active regions   Edit Entry  Download Preprint  Submitter's Homepage Delete Entry 

Key
Go to main E-Print pageGo to main E-Print page.
Previous AbstractPrevious Abstract.
Next AbstractNext Abstract.
Download PreprintDownload Preprint.
Submitter's HomepageSubmitters Homepage.
Edit EntryEdit Entry.
View All Abstracts By SubmitterView all abstracts by submitter.
Delete AbstractDelete abstract.

Latest Entries
Frequency rising sub-THz emission from solar flare ribbons
Particle acceleration in coalescent and squashed magnetic islands I. Test particle approach
Statistical Analysis of Torus and Kink Instabilities in Solar Eruptions
Solar Eruptions, Forbush Decreases and Geomagnetic Disturbances from Outstanding Active Region 12673
Coronal hard X-ray sources revisited
Manifestations of bright points observed in G-band and Ca II H by Hinode/SOT
Propagation of Leaky MHD Waves at Discontinuities with Tilted Magnetic Field
Time variations of the non-potential and volume-threading magnetic helicities
Advances in mean-field dynamo theory and applications to astrophysical turbulence
Reverse Current Model for Coronal Mass Ejection Cavity Formation
Predictions of DKIST/DL-NIRSP Observations for an Off-limb Kink-unstable Coronal Loop
Exploring the biases of a new method based on minimum variance for interplanetary magnetic clouds
The non-modal onset of the tearing instability
SpatioTemporal Evolution and North-South Asymmetry of Quasi-Biennial Oscillations in the Coronal Fe XIV Emission
Corotating Shock Waves and the Solar-Wind Source of Energetic Ion Abundances: Power Laws in A/Q
Coronal condensations caused by magnetic reconnection between solar coronal loops
Measurement of Vector Magnetic Field in a Flare kernel with a Spectropolarimetric Observation in He I 10830 A
The Relation Between Escape and Scattering Times of Energetic Particles in a Turbulent Magnetized Plasma: Application to Solar Flares
Implications of loop-top origin for microwave, hard X-ray, and low-energy gamma-ray emissions from behind the limb flares
Solar radio emission as a disturbance of aeronautical radionavigation

Related Pages
MSU Solar Physics.
Max Millennium Science Mail Archive.
Max Millennium Message of the Day Mail Archive.
Max Millennium Flare Catalog

Archive Maintainer
Alisdair Davey



© 2003 Solar Physics Group - Montana State University