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7 papers · 2 filters
Coronal Mass Ejection Detection using Wavelets, Curvelets and Ridgelets: Applications for Space Weather Monitoring
Peter T. Gallagher, C. Alex Young, Jason P. Byrne +1
Coronal mass ejections (CMEs) are large-scale eruptions of plasma and magnetic feld that can produce adverse space weather at Earth and other locations in the Heliosphere. Due to t…
Examining Periodic Solar Wind Density Structures Observed in the SECCHI Heliospheric Imagers
Nicholeen M. Viall, Harlan E. Spence, Angelos Vourlidas +1
We present an analysis of small-scale, periodic, solar-wind density enhancements (length-scales as small as \approx 1000 Mm) observed in images from the Heliospheric Imager (HI) ab…
A Reconnecting Current Sheet Imaged in A Solar Flare
Rui Liu, Jeongwoo Lee, Tongjiang Wang +3
Magnetic reconnection changes the magnetic field topology and powers explosive events in astrophysical, space and laboratory plasmas. For flares and coronal mass ejections (CMEs) i…
Automated Detection of Oscillating Regions in the Solar Atmosphere
Jack Ireland, Michael S. Marsh, Therese A. Kucera +1
Recently observed oscillations in the solar atmosphere have been interpreted and modeled as magnetohydrodynamic wave modes. This has allowed the estimation of parameters that are o…
NLTE model atmospheres for the hottest white dwarfs: Spectral analysis of the compact component in nova V4743 Sgr
T. Rauch, M. Orio, R. Gonzales-Riestra +4
Half a year after its outburst in September 2002, nova V4743 Sgr evolved into the brightest supersoft X-ray source in the sky with a flux maximum around 30A. We calculated grids of…
A Hot Microflare Observed With RHESSI and Hinode
Ryan O. Milligan
RHESSI and Hinode observations of a GOES B-class flare are combined to investigate the origin of 15 MK plasma. The absence of any detectable hard X-ray emission coupled with weak b…