Search Publications
Total Solar Irradiance Monitor for the FY-3B Satellite - Space Experiments and Primary Data Corrections
Wang, Hongrui; Li, Huiduan; Qi, Jin +1 more
We present space experiments of the Total Solar Irradiance Monitor (TSIM) on the FY-3B satellite. The total solar irradiance (TSI) has been measured by TSIM/FY-3B continuously for nearly four years, with some short data gaps. Overlapping measurements of the TSI are provided by the TSIM, with three electrical substitution radiometers that are mount…
Correlation Between CME Occurrence Rate and Current Helicity in the Global Magnetic Field of Solar Cycle 23
Zhang, Mei; Wang, Chuanyu
We investigate the correlation between the occurrence rate of the monthly coronal mass ejection (CME) and the magnitude of the current helicity in global magnetic field on the photosphere of solar cycle 23. We used the technique introduced by Pevtsov and Latushko (Astrophys. J. 528, 999, 2000) to retrieve the vector magnetic field from longitudina…
`Fingerprint' Fine Structure in the Solar Decametric Radio Spectrum Solar Physics
Konovalenko, A. A.; Melnik, V. N.; Dorovskyy, V. V. +2 more
We study a unique fine structure in the dynamic spectrum of the solar radio emission discovered by the UTR-2 radio telescope (Kharkiv, Ukraine) in the frequency band of 20 - 30 MHz. The structure was observed against the background of a broadband type IV radio burst and consisted of parallel drifting narrow bands of enhanced emission and absorptio…
Application of Mutual Information Methods in Time-Distance Helioseismology
Pevtsov, Alexei A.; Kholikov, Shukur; Keys, Dustin
We apply a new technique, the mutual information (MI) from information theory, to time-distance helioseismology, and demonstrate that it can successfully reproduce several classic results based on the widely used cross-covariance method. MI quantifies the deviation of two random variables from complete independence and represents a more general me…
The Balmer Lines of He II in the Blue Wing of the Hydrogen Lyman α Line Observed in a Quiescent Prominence
Vial, J. -C.; Curdt, W.; Eurin, G.
We revisit the prominence observations in the Lyman α line of Curdt et al. (Astron. Astrophys.511, L4, 2010) and focus on the bump in the blue wing of the line, which we identify with He II Balmer lines. We determine the transition candidates, derive an upper limit for the width of the profile and an associated non-thermal velocity close to 0 km s…
Hinode SOT Plate Scale Reinvestigated by G-Band Images on the 2012 Transit of Venus
Shimizu, T.; Imamura, T.; Nakamura, M. +1 more
The Hinode Solar Optical Telescope (SOT) successfully observed the transit of Venus with an unprecedented high spatial resolution on 5 - 6 June 2012, providing images of the aureole refracted by the atmosphere of Venus and the dark Venus disk against the bright solar surface. The transit of Venus provided a unique opportunity for calibrating the p…