Mechanisms and Observations of Coronal Dimming for the 2010 August 7 Event

Abstract

Coronal dimming of extreme ultraviolet (EUV) emission has the potential to be a useful forecaster of coronal mass ejections (CMEs). As emitting material leaves the corona, a temporary void is left behind which can be observed in spectral images and irradiance measurements. The velocity and mass of the CMEs should impact the character of those observations. However, other physical processes can confuse the observations. We describe these processes and the expected observational signature, with special emphasis placed on the differences. We then apply this understanding to a coronal dimming event with an associated CME that occurred on 2010 August 7. Data from the Solar Dynamics Observatory's (SDO) Atmospheric Imaging Assembly (AIA) and EUV Variability Experiment (EVE) are used for observations of the dimming, while the Solar and Heliospheric Observatory's (SOHO) Large Angle and Spectrometric Coronagraph (LASCO) and the Solar Terrestrial Relations Observatory's (STEREO) COR1 and COR2 are used to obtain velocity and mass estimates for the associated CME. We develop a technique for mitigating temperature effects in coronal dimming from full-disk irradiance measurements taken by EVE. We find that for this event, nearly 100% of the dimming is due to mass loss in the corona.

References in corpus (10)

• Ionization balance for optically thin plasmas: rate coefficients for all atoms and ions of the elements H to Ni
• Advances in Observing Various Coronal EUV Waves in the SDO Era and Their Seismological Applications (Invited Review)
• First Determination of the True Mass of Coronal Mass Ejections: A Novel Approach to Using the Two STEREO Viewpoints
• What can we learn about solar coronal mass ejections, coronal dimmings, and Extreme-Ultraviolet jets through spectroscopic observations?
• Energy release from impacting prominence material following the 2011 June 7 eruption
• Constraining Solar Flare Differential Emission Measures with EVE and RHESSI
• Observations of Thermal Flare Plasma with the EUV Variability Experiment
• Study of the recurring dimming region detected at AR 11305 using the Coronal Dimming Tracker (CoDiT)
• The Temperature-Dependent Nature of Coronal Dimmings
• Plasma diagnostic in eruptive prominences from SDO/AIA observations at 304 Å

Cited by in corpus (26)

• Global Energetics of Solar Flares: V. Energy Closure in Flares and Coronal Mass Ejections
• Indications of stellar coronal mass ejections through coronal dimmings
• The Stellar CME-flare relation: What do historic observations reveal?
• Ultra-Wideband Detection of 22 Coherent Radio Bursts on M Dwarfs
• The MUSCLES Treasury Survey IV: Scaling Relations for Ultraviolet, Ca II K, and Energetic Particle Fluxes from M Dwarfs
• Relationship of EUV Irradiance Coronal Dimming Slope and Depth to Coronal Mass Ejection Speed and Mass
• Evidence For The Magnetic Breakout Model in an Equatorial Coronal-Hole Jet
• Upflows in the upper solar atmosphere
• Sun-as-a-star spectroscopic observations of the line-of-sight velocity of a solar eruption on October 28, 2021
• Constraining the Physical Properties of Stellar Coronal Mass Ejections with Coronal Dimming: Application to Far Ultraviolet Data of $\epsilon$ Eridani
• Plasma diagnostics of coronal dimming events
• Stellar Coronal Mass Ejections
• The Nature of CME-Flare Associated Coronal Dimming
• A Fast, Simple, Robust Algorithm for Coronal Temperature Reconstruction
• Global Energetics of Solar Flares: IV. Coronal Mass Ejection Energetics
• Pre-flare coronal dimmings
• Coronal Mass Ejections and Dimmings: A Comparative Study using MHD Simulations and SDO Observations
• Statistical study of solar dimmings using CoDiT
• Global Energetics of Solar Flares: VI. Refined Energetics of Coronal Mass Ejections
• Can we detect coronal mass ejections through asymmetries of Sun-as-a-star extreme-ultraviolet spectral line profiles?
• Mass Loss Evolution in the EUV Low Corona from SDO/AIA Data
• Coronal Dimming as a Proxy for Stellar Coronal Mass Ejections
• Remote coronal dimmings related to a circular-ribbon flare
• Detecting Stellar Coronal Mass Ejections via Coronal Dimming in the Extreme Ultraviolet
• Homologous compact major blowout-eruption solar flares and their production of broad CMEs
• Evidence of Extreme Ultraviolet Resonant Excitation in the Middle Corona During A Solar Flare