Search Publications
Influence of the Ambient Solar Wind Flow on the Propagation Behavior of Interplanetary Coronal Mass Ejections
Veronig, Astrid M.; Temmer, Manuela; Vršnak, Bojan +3 more
We study three coronal mass ejection (CME)/interplanetary coronal mass ejection (ICME) events (2008 June 1-6, 2009 February 13-18, and 2010 April 3-5) tracked from Sun to 1 AU in remote-sensing observations of Solar Terrestrial Relations Observatory Heliospheric Imagers and in situ plasma and magnetic field measurements. We focus on the ICME propa…
LYRA Observations of Two Oscillation Modes in a Single Flare
Berghmans, D.; Goossens, M.; Zender, J. +2 more
We analyze light curves from the LYRA irradiance experiment on board PROBA2 during the flare of 2010 February 8. We see both long- and short-period oscillations during the flare. The long-period oscillation is interpreted in terms of standing slow sausage modes; the short-period oscillation is thought to be a standing fast sausage mode. The simult…
Thermodynamics of the Solar Corona and Evolution of the Solar Magnetic Field as Inferred from the Total Solar Eclipse Observations of 2010 July 11
Morgan, Huw; Habbal, Shadia Rifai; Daw, Adrian +7 more
We report on the first multi-wavelength coronal observations, taken simultaneously in white light, Hα 656.3 nm, Fe IX 435.9 nm, Fe X 637.4 nm, Fe XI 789.2 nm, Fe XIII 1074.7 nm, Fe XIV 530.3 nm, and Ni XV 670.2 nm, during the total solar eclipse of 2010 July 11 from the atoll of Tatakoto in French Polynesia. The data enabled temperature differenti…
SWAP-SECCHI Observations of a Mass-loading Type Solar Eruption
Berghmans, David; Mierla, Marilena; Zhukov, Andrei N. +2 more
We present a three-dimensional reconstruction of an eruption that occurred on 2010 April 3 using observations from SWAP on board PROBA2 and SECCHI on board STEREO. The event unfolded in two parts: an initial flow of cooler material confined to a height low in the corona, followed by a flux rope eruption higher in the corona. We conclude that mass …
Structure and Dynamics of the 2010 July 11 Eclipse White-light Corona
Seaton, D. B.; Golub, L.; Lucas, R. +8 more
The white-light corona (WLC) during the total solar eclipse on 2010 July 11 was observed by several teams in the Moon's shadow stretching across the Pacific Ocean and a number of isolated islands. We present a comparison of the WLC as observed by eclipse teams located on the Tatakoto Atoll in French Polynesia and on Easter Island, 83 minutes later…
Hierarchical approach to forecasting recurrent solar wind streams
Berghmans, D.; Seaton, D. B.; Veselovsky, I. S. +1 more
The hierarchical approach to predicting quasi-stationary, high-speed solar wind (SW) streams is described. This approach integrates various types of data into a single forecasting system by means of an ensemble of experts. The input data included the daily values of the coronal hole areas, which were calculated from the ultraviolet images of the S…
Monitoring the solar UV irradiance spectrum from the observation of a few passbands
Kretzschmar, M.; Dudok de Wit, T.; Cessateur, G. +3 more
Context. The solar irradiance in the UV is a key ingredient in space weather applications; however, because of the lack of continuous and long-term observations, various indices are still used today as surrogates for the solar spectral irradiance.
Aims: As an alternative to current spectrometers we use a few radiometers with properly chosen p…