We observed the line-of-sight magnetic field in the chromosphereandphotosphere of a large quiescent filament on the solar disk on September 6, 2001using the Sol
Chromospheric lines, including Hα, Lyα, Lyβ and CaⅡ K, CaⅡ 8542,are systemically and quantitatively investigated with respect to the non-thermal excitation
The 13CO (J=1-0) map of the molecular cloud Sgr B2 reveals that the mass center of the molecular cloud nucleus does not coincide with that of compact HII region
Many projects have recently been carried out and proposed for observing high energy electrons since it is realized that cosmic ray electrons are very important
Average pulse profiles of pulsar signals are analyzed using the bispectrum tech-nique. The result shows that there are nonlinear phase couplings between the two
We present the light curve and photometric solutions of the contact binary AD Cnc. The light curve appears to exhibit a typical O'Connell effect, with Maxim