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《中国天文和天体物理学报(英文版)》 1990-01
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3000 BUMP OF TYPE I SEYFERT GALAXIES AND ITS APPEARANCE ON COLOUR-COLOUR DIAGRAM

Bao Shizong(Dept, of Physics, Zhejiang University)Zhou Youyuan(Center of Astronomy & Astrophysics, CCAST (World Lab.), Center for Astrophysics, Universityof Scj. & Tech. of China)Cheng Fuzhen(Center for Astrophysics, University of Sci & Tech. of China)Chen Fuhua(Center of Astronomy & Astrophysics, CCAST (World Lab.), Center for Astrophysics, Universityof Sci. & Tech. of China)Mao Peigen(Dept. of Physics, Hangzhou University)  
Assuming that the main continuum emission mechanisms of type I Seyfert galaxies in visual and UV bands are power-law nonthermal emission, blackbody emission, recombination emission of Balmer continuum in the broad line region and high order Balmer line emission, we calculate the parameters of these mechanisms from their color indices (U-B, B-V) and find that the results agree with those obtained from the spectrophotometric measure. Therefore we can determine the ratio of the thermal component to the whole emission for Sy I galaxies with the values of colour indices and give a method to study emission mechanism of QSOs in visual and UV bands.
【Fund】: 国家自然科学基金
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【Secondary Citations】
Chinese Journal Full-text Database 1 Hits
1 Zhou You-yuan Cheng Fu-zhen Chu Yao-quan Fang Li-zhi (University of Science and Technology of China);A STATISTICAL ANALYSIS FOR QUASARS WITH RADIO COMPONENTS STRUCTURE Ⅱ.RELATIONS OF ABSOLUTE VISUAL MAGNITUDE,ABSOLUTE RADIO MAGNITUDE AND COLOUR INDEX DIFFERENCE Q WITH THE LINEAR DISTANCE BETWEEN COMPONENTS,AND THE ASSOCIATED EVOLUTION FEATURE[J];Acta Astronomica Sinica;1977-01
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