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Multiwavelength Imaging and Spectroscopy of Chromospheric Evaporation in an M-class Solar Flare


Veronig, Astrid; Rybak, Jan; Gomory, Peter; Berkebile-Stoiser, Sigrid; Temmer, Manuela; Otruba, Wolfgang; Vršnak, Bojan; Potzi, Werner; Baumgartner, D.
Multiwavelength Imaging and Spectroscopy of Chromospheric Evaporation in an M-class Solar Flare // The Astrophysical journal, 719 (2010), 655-670 doi::10.1088/0004-637X/719/1/655 (međunarodna recenzija, članak, znanstveni)


Naslov
Multiwavelength Imaging and Spectroscopy of Chromospheric Evaporation in an M-class Solar Flare

Autori
Veronig, Astrid ; Rybak, Jan ; Gomory, Peter ; Berkebile-Stoiser, Sigrid ; Temmer, Manuela ; Otruba, Wolfgang ; Vršnak, Bojan ; Potzi, Werner ; Baumgartner, D.

Izvornik
The Astrophysical journal (0004-637X) 719 (2010); 655-670

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
sun: chromosphere; sun: corona; sun: flares; sun: transition region; sun: UV radiation; sun: X-rays; gamma rays

Sažetak
We study spectroscopic observations of chromospheric evaporation mass flows in comparison with the energy input by electron beams derived from hard X-ray (HXR) data for the white-light M2.5 flare of 2006 July 6. The event was captured in high-cadence spectroscopic observing mode by SOHO/CDS combined with high-cadence imaging at various wavelengths in the visible, extreme ultraviolet, and X-ray domain during the joint observing campaign JOP171. During the flare peak, we observe downflows in the He i and O v lines formed in the chromosphere and transition region, respectively, and simultaneous upflows in the hot coronal Si xii line. The energy deposition rate by electron beams derived from RHESSI HXR observations is suggestive of explosive chromospheric evaporation, consistent with the observed plasma motions. However, for a later distinct X-ray burst, where the site of the strongest energy deposition is exactly located on the Coronal Diagnostics Spectrometer (CDS) slit, the situation is intriguing. The O v transition region line spectra show the evolution of double components, indicative of the superposition of a stationary plasma volume and upflowing plasma elements with high velocities (up to 280 km s–1) in single CDS pixels on the flare ribbon. However, the energy input by electrons during this period is too small to drive explosive chromospheric evaporation. These unexpected findings indicate that the flaring transition region is much more dynamic, complex, and fine structured than is captured in single-loop hydrodynamic simulations.

Izvorni jezik
Engleski

Znanstvena područja
Fizika



POVEZANOST RADA


Projekt / tema
007-0000000-1362 - Eruptivni procesi u Sunčevoj atmosferi (Bojan Vršnak, )

Ustanove
Geodetski fakultet, Zagreb

Profili:

Avatar Url Bojan Vršnak (autor)

Citiraj ovu publikaciju

Veronig, Astrid; Rybak, Jan; Gomory, Peter; Berkebile-Stoiser, Sigrid; Temmer, Manuela; Otruba, Wolfgang; Vršnak, Bojan; Potzi, Werner; Baumgartner, D.
Multiwavelength Imaging and Spectroscopy of Chromospheric Evaporation in an M-class Solar Flare // The Astrophysical journal, 719 (2010), 655-670 doi::10.1088/0004-637X/719/1/655 (međunarodna recenzija, članak, znanstveni)
Veronig, A., Rybak, J., Gomory, P., Berkebile-Stoiser, S., Temmer, M., Otruba, W., Vršnak, B., Potzi, W. & Baumgartner, D. (2010) Multiwavelength Imaging and Spectroscopy of Chromospheric Evaporation in an M-class Solar Flare. The Astrophysical journal, 719, 655-670 doi::10.1088/0004-637X/719/1/655.
@article{article, year = {2010}, pages = {655-670}, DOI = {doi:10.1088/0004-637X/719/1/655}, keywords = {sun: chromosphere, sun: corona, sun: flares, sun: transition region, sun: UV radiation, sun: X-rays, gamma rays}, journal = {The Astrophysical journal}, doi = {doi:10.1088/0004-637X/719/1/655}, volume = {719}, issn = {0004-637X}, title = {Multiwavelength Imaging and Spectroscopy of Chromospheric Evaporation in an M-class Solar Flare}, keyword = {sun: chromosphere, sun: corona, sun: flares, sun: transition region, sun: UV radiation, sun: X-rays, gamma rays} }

Časopis indeksira:


  • Current Contents Connect (CCC)
  • Web of Science Core Collection (WoSCC)
    • Science Citation Index Expanded (SCI-EXP)
    • SCI-EXP, SSCI i/ili A&HCI
  • Scopus


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  • NASA ADS


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