The observational results of the Nobeyama 45-m SiO maser survey and the Arecibo 305-m OH maser survey are assembled for an analysis of the distribution and kine
Inspired by the analogy between the magnetic field and velocity fieldof incompressible fluid flow, we propose a fluid dynamics approach for comput-ing nonlinear
Using high signal-to-noise ratio spectra of extrasolar planet-hosting stars, we obtained the atmospheric parameters, accurate metallicities and the differential
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