Search Publications
Near-infrared photometry of 20 hipparcos carbon stars
Chen, Pei-Sheng; Yang, Xiao-Hong; Wang, Xun-Hao
Near-infrared JHK photometry was carried out for 20 carbon stars observed by the satellite Hipparcos. From the observations, bolometric corrections in the K band ( BCK), apparent bolometric magnitudes ( mrmbo) and effective temperatures ( Te) of these stars were estimated. Combined with the trigonometric parallaxes…
A magnetohydrodynamic simulation of the single-fluid 2-D structure of the solar wind
Xue, Jin-Tao; Wang, Jing-Fang; Qian, Xin +1 more
The system of single-fluid 2-D magnetohydrodynamic (MHD) equations incorporating the momentum term is simulated and the structure of the solar wind in the meridian plane is acquired. The form and location of the momentum addition have an important effect on the velocity and proton density of the solar wind in distant places. By locating the additi…
Fuzzy set theory applied to CME importance classification
Han, Zheng-Zhong; Tang, Yu-Hua
In this paper, fuzzy set theory is applied to a quantitative way of assigning importance class to coronal mass ejection (CME) events based on four observed characteristics, i.e. velocity, span, mass and kinetic energy. The weights to be associated with each of the characteristics and the membership functions of belonging to one of the three import…