The Solar Physics Division

The Solar Physics Division was set up in 1978. The Division now has 36 persons, among whom there are 12 research persons. The main observation research work is as follows: (1) The sunspot drawings (from 1956 on) and photograph observations (from 1970 on) are carried out with a 5-inch Zeiss refraclor; (2) The flare patrol observations are made with a Lyot heliophoto-graph,of which the perture was 14 cm, with an H-Alfa filler of 0.75 Å bandpass (from 1967 to 1982),and from 1982 on the aperture is 18 cm, with an H-Alfa filter of 0.5 A bandpass. (3) The measurements of sunspot magnetic fields (from 1975 on) and SSHG velocity fields of active regions (from 1980 on)are taken with a horizontal solar spectrograph.#br#In recent ten years, the division has researched a series of solar subjects and made a number of achievements,involving the contents such as solar prediction, solar active regions, spiral sunspots, flare prominences (filaments, ancient sunspots, etc.#br#The solar routine observations may be made about 320 days every year at Yunnan Observatory. The seeing of the Sun is good.#br#The division has edited and published "Monthly Solar Activity" since 1981.#br#The division has exchanged the information on solar activities with Meudon Observatory of France through telex since the last period of SMY.#br#The physics of solar active regions is the major research target of the division from now on.