E-Print Archive

There are 4354 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
Chromospheric evaporation flows and density changes deduced from Hinode/EIS during an M1.6 flare View all abstracts by submitter

Peter Gömöry   Submitted: 2016-02-16 13:12

We analyzed high-cadence sit-and-stare observations acquired with theHinode/EIS spectrometer and HXR measurements acquired with RHESSIduring an M-class flare. During the flare impulsive phase, we observeno significant flows in the cooler Fe XIII line but strong upflows, upto 80-150 km s-1, in the hotter Fe XVI line. The largest Doppler shiftsobserved in the Fe XVI line were co-temporal with the sharp intensitypeak. The electron density obtained from a Fe XIII line pair ratioexhibited fast increase (within two minutes) from the pre-flare levelof 5.01x109 cm-3 to 3.16x1010 cm-3 during the flarepeak. The nonthermal energy flux density deposited from the coronalacceleration site to the lower atmospheric layers during the flarepeak was found to be 1.34x1010 erg/s/cm2 for a low-energycut-off that was estimated to be 16 keV. During the decline flarephase, we found a secondary intensity and density peak of loweramplitude that was preceded by upflows of 15 km s-1 that were detectedin both lines. The flare was also accompanied by a filament eruptionthat was partly captured by the EIS observations. We derived Dopplervelocities of 250-300 km s-1 for the upflowing filament material.Thespectroscopic results for the flare peak are consistent with thescenario of explosive chromospheric evaporation, although acomparatively low value of the nonthermal energy flux density wasdetermined for this phase of the flare. This outcome is discussed inthe context of recent hydrodynamic simulations. It providesobservational evidence that the response of the atmospheric plasmastrongly depends on the properties of the electron beams responsiblefor the heating, in particular the steepness of the energydistribution.

Authors: Gömöry, P.; Veronig, A. M.; Su, Y.; Temmer, M.; Thalmann, J. K.
Projects: Hinode/EIS

Publication Status: Accepted for publication in Astronomy and Astrophysics
Last Modified: 0000-00-00 00:00
Go to main E-Print page  Observations of EUV Waves in 3He-rich Solar Energetic Particle Events  EUV Flickering of Solar Coronal Loops: A New Diagnostic of Coronal Heating  Edit Entry  Download Preprint  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
Energy budget of plasma motions, heating, and electron acceleration in a three-loop solar flare
Space weather: the solar perspective - an update to Schwenn (2006)
Mixed properties of slow magnetoacoustic and entropy waves in a plasma with heating/cooling misbalance
The morphology of average solar flare time profiles from observations of the Sun's lower atmosphere
Indications of stellar coronal mass ejections through coronal dimmings
Could switchbacks originate in the lower solar atmosphere? II. Propagation of switchbacks in the solar corona
Solar large-scale magnetic field and cycle patterns in solar dynamo
Three-dimensional magnetic reconnection in astrophysical plasmas
Energy partition in a confined flare with an extreme-ultraviolet late phase
Alfvén wave heating in partially ionized thin threads of solar prominences
He I 10830 Dimming During Solar Flares, I: The Crucial Role of Non-Thermal Collisional Ionisations
Separating aa-index into Solar and Hale Cycle Related Components Using Principal Component Analysis
Inward Propagating Plasma Parcels in the Solar Corona: Models with Aerodynamic Drag, Ablation, and Snowplow Accretion
Energetics and 3-D Structure of Elementary Events in Solar Coronal Heating
Stellar Superflares Observed Simultaneously with Kepler and XMM-Newton
Medium-term predictions of F10.7 and F30 cm solar radio flux with the adaptive Kalman filter
Resonances in a Coronal Loop Driven by Torsional Alfvén Waves Propagating from the Photosphere
Effects of external flow on resonant absorption of coronal loop kink oscillations driven by an external fast wave: Selective excitation problem
Emerging Dimming as Coronal Heating Episodes
Proxy-Based Prediction of Solar Extreme Ultraviolet Emission using Deep Learning

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



© 2000-2020 Solar Physics Group - Montana State University