A Coronal Thick-Target Interpretation of Two Hard X-Ray Loop Events

By Astrid Veronig, JOHN C. Brown. 2004

151 citations recorded by the source corpus.

Subfields: Astronomy and Astrophysics

View Paper: https://www.semanticscholar.org/paper/9046338bdfab11c80546e2f1cc1d7e3d07236652

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In Astronomy and Astrophysics

1. M. Temmer
2. V. Petrosian
3. H. Hudson
4. B. Vršnak
5. Wei Liu
6. L. Fletcher
7. Astrid Veronig
8. Brian R. Dennis

Citations in the corpus

• Impulsive Phase Flare Energy Transport by Large-Scale Alfvén Waves and the Electron Acceleration Problem (2007, background): “With the exception of coronal soft X-ray ‘‘knots’’ (e.g., Doschek et al. 1995) and rare observations of dense coronal loop flares which show negligible footpoint emission (e.g., Veronig & Brown 2004), the coronal density before and early in a flare is fairly low.”
• Implications of X-ray Observations for Electron Acceleration and Propagation in Solar Flares (2011, background): “Veronig and Brown (2004), for example, found coronal sources with column densities high enough to act as thick targets for electrons with energies up to 60 keV.”
• X-ray sources and magnetic reconnection in the X3.9 flare of 2003 November 3 (2006, background): “5 events cf. Sui & Holman (2003), Sui et al. (2004) and Veronig & Brown (2004).”
• Double Coronal Hard and Soft X-Ray Source Observed by RHESSI: Evidence for Magnetic Reconnection and Particle Acceleration in Solar Flares (2007, result): “…are contrary to the predictions of the collisional thick-target model (e.g., Brown 1971; Petrosian 1973), which has been generally accepted for the footpoint emission and was recently invoked by Veronig & Brown (2004) to explain the bulk coronal HXRs in two flares described by Sui et al. (2004).”
• An Observational Overview of Solar Flares (2011, background): “Though this is pos ible later in the flare (once evaporation has started) there is little imagingor spectroscopic evidence for such loop densities before the flare (except in coronal thick target loop flares of Veronig & Brown 2004, which do not show footpoints).”
• Hard X-ray emission from the solar corona (2008, background): “4 The coronal thick-target event of 14/15 April 2002 (Veronig and Brown 2004): Top RHESSI light curves and spectrum integrated over the burst at approximately 00:03:30 UTC.”