Different Signatures of Chromospheric Evaporation in Two Solar Flares Observed with IRIS
arXiv:1905.09709 · doi:10.3847/1538-4357/ab245a
Abstract
We present different signatures of chromospheric evaporation in two solar flares observed by the Interface Region Imaging Spectrograph (IRIS). In the B1.6 flare on 2016 December 6 (SOL2016-12-06T10:40), the transition region Si IV line and the chromospheric C II and Mg II lines show blueshifts with low velocities up to 20 km/s at the flare loop footpoints in the rise phase, indicative of a gentle chromospheric evaporation. While in the C1.6 flare on 2015 December 19 (SOL2015-12-19T10:51), the Si IV, C II, and Mg II lines exhibit redshifts with velocities from several to tens of km/s at the footpoints, which might suggest an explosive chromospheric evaporation. Explosive evaporation has been observed in many flares that were captured by IRIS; however, gentle evaporation, especially manifested as blueshifts in the cool Si IV, C II, and Mg II lines, has scarcely been reported. Our results bring some new insights into chromospheric evaporation in the IRIS era.
arXiv commentApJ accepted. Comments are welcome
References in corpus (35)
- The Interface Region Imaging Spectrograph (IRIS)
- Velocity Characteristics of Evaporated Plasma Using Hinode/EIS
- Temporal evolution of multiple evaporating ribbon sources in a solar flare
- RHESSI and SOHO/CDS Observations of Explosive Chromospheric Evaporation
- Temporal evolution of chromospheric evaporation: case studies of the M1.1 flare on 2014 September 6 and X1.6 flare on 2014 September 10
- Imaging and spectroscopic observations of magnetic reconnection and chromospheric evaporation in a solar flare
- Slipping Magnetic Reconnection, Chromospheric Evaporation, Implosion, and Precursors in the 2014 September 10 X1.6-Class Solar Flare
- Observational Evidence for Gentle Chromospheric Evaporation During the Impulsive Phase of a Solar Flare
- The Atmospheric Response to High Nonthermal Electron Beam Fluxes in Solar Flares I: Modeling the Brightest NUV Footpoints in the X1 Solar Flare of 2014 March 29
- Properties of a solar flare kernel observed by Hinode and SDO
- The 2014 March 29 X-flare: sub-arcsecond resolution observations of Fe XXI 1354.1
- Simultaneous IRIS and Hinode/EIS observations and modelling of the 27 October 2014 X 2.0 class flare
- Explosive Chromospheric Evaporation in a Circular-ribbon Flare
- Chromospheric Condensation and Quasi-periodic Pulsations in a Circular-ribbon Flare
- Investigating the response of loop plasma to nanoflare heating using RADYN simulations
- Chromospheric Evaporation in an X1.0 Flare on 2014 March 29 Observed with IRIS and EIS
- Si IV Resonance Line Emission During Solar Flares: Non-LTE, Non-equilibrium, Radiation Transfer Simulations
- IRIS Observations of the Mg II h & k Lines During a Solar Flare
- Spectroscopic observations of evolving flare ribbon substructure suggesting origin in current sheet waves
- Chromospheric Evaporation in an M1.8 Flare Observed by the Extreme-ultraviolet Imaging Spectrometer on Hinode
- Dynamics and evolution of an eruptive flare
- The development of lower-atmosphere turbulence early in a solar flare
- Blue wing enhancement of the chromospheric Mg II h and k lines in a solar flare
- Multi-episode chromospheric evaporation observed in a solar flare
- Different Patterns of Chromospheric Evaporation in a Flaring Region Observed with Hinode/EIS
- Observational Evidences of Electron-driven Evaporation in two Solar Flares
- How important are electron beams in driving chromospheric evaporation in the 2014 March 29 flare?
- Transition Region and Chromospheric Signatures of Impulsive Heating Events. I. Observations
- Properties of chromospheric evaporation and plasma dynamics of a solar flare from IRIS observations
- Evidence of Explosive Evaporation in a Microflare Observed by Hinode/EIS
- IRIS, Hinode, SDO, and RHESSI observations of a white light flare produced directly by non-thermal electrons
- Explosive chromospheric evaporation driven by nonthermal electrons around one footpoint of a solar flare loop
- Spectroscopic Observations of Magnetic Reconnection and Chromospheric Evaporation in an X-shaped Solar Flare
- Observations of Electron-driven Evaporation during a Flare Precursor
- Relationship between chromospheric evaporation and magnetic field topology in M-class solar flare
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- Detection of Flare-induced Plasma Flows in the Corona of EV Lac with X-ray Spectroscopy
- Search for flares and associated CMEs on late-type main-sequence stars in optical SDSS spectra
- APO & SMARTS flare star campaign observations I. Blue wing asymmetries in chromospheric lines during mid M dwarf flares from simultaneous spectroscopic and photometric observation data
- Detection of Flare-associated CME Candidates on Two M-dwarfs by GWAC and Fast, Time-resolved Spectroscopic Follow-ups
- IRIS Si IV Line Profiles at Flare Ribbons as Indications of Chromospheric Condensation
- Can we detect coronal mass ejections through asymmetries of Sun-as-a-star extreme-ultraviolet spectral line profiles?
- Heating at the remote footpoints as a brake on jet flows along loops in the solar atmosphere
- Diagnosing the Optically Thick/Thin Features Using the Intensity Ratio of Si IV Resonance Lines in Solar Flares
- Simultaneous Observations of Chromospheric Evaporation and Condensation during a C-class Flare
- Spectroscopic Observations of High-speed Downflows in a C1.7 Solar Flare
- Imaging and Spectroscopic Observations of the Dynamic Processes in Limb Solar Flares
- On the intensity ratio variation of the Si IV 1394/1403 Å lines during solar flares
- A new view of the solar interface region from the Interface Region Imaging Spectrograph (IRIS)