ULTRAVIOLET

作品数：668被引量：962H指数：12
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Summary of a Life in Observational Ultraviolet/Optical Astronomy
《Research in Astronomy and Astrophysics》2024年第1期1-43,共43页Donald G.York 
I reminisce on my early life in Section 1;on my education in Sections 2 and 3;on the years at Princeton as a research astronomer in Section 4;on the years on the faculty at Chicago in Section 5;on research on Diffuse ...
关键词：Interstellar Medium(ISM) NEBULAE (galaxies:)quasars:absorption lines ultraviolet:stars 
ASTROSAT/UVIT Near and Far Ultraviolet Properties of the M31 Bulge
《International Journal of Astronomy and Astrophysics》2021年第2期151-174,共24页Denis Leahy Cole Morgan Josep Postma Megan Buick 
AstroSat has surveyed M31 with the UVIT telescope from 2017 to 2019. The central bulge of M31 was observed in 2750 - 2850 A, 2000 - 2400 A, 1600 - 1850 A, 1450 - 1750 A, and 1200 - 1800 A filters. A radial profile ana...
关键词：UV Astronomy Galaxies: M31 
FUV and NIR size of the HI selected low surface brightness galaxies
《Research in Astronomy and Astrophysics》2021年第3期251-260,共10页Cheng Cheng Wei Du Cong Kevin Xu Tian-Wen Cao Hong-Xin Zhang Jia-Sheng Huang Chuan He Zi-Jian Li Shu-Mei Wu Hai Xu YSophia Dai Xu Shao Marat Musin 
supported by the National Key R&D Program of China(Grant 2017YFA0402704);by the National Natural Science Foundation of China(NSFC,Nos.11803044,11933003,11673028);sponsored(in part)by the Chinese Academy of Sciences(CAS),through a grant to the CAS South America Center for Astronomy(CASSACA);supported by the NSFC(Nos.U1931109 and 11733006);the Young Researcher Grant funded by National Astronomical Observatories,Chinese Academy of Sciences(CAS);the Youth Innovation Promotion Association,CAS。
How low surface brightness galaxies(LSBGs)form stars and assemble stellar mass is one of the most important questions related to understanding the LSBG population.We select a sample of 381 HI bright LSBGs with both fa...
关键词：Galaxies:evolution Galaxies:dwarf Ultraviolet:galaxies Galaxies:star formation 
On the weak Lyα emission line of BL Lacertae objects
《Research in Astronomy and Astrophysics》2019年第10期145-151,共7页Jia Bu Ren-Yi Ma Tao-Tao Fang Xiao-Di Yu Xin-Wu Cao 
supported by the National Key R&D Program of China (2017YFA0402600);the National Natural Science Foundation of China (Grant Nos. 11525312 and U1531130)
Recent studies reveal that weak Lyα emission line may be a ubiquitous feature of nearby BL Laceratae objects(BL Lacs). We present a survey of the Lyα emission lines in BL Lacs, with a focus on data obtained by the C...
关键词：GALAXIES active-BL Lacertae OBJECTS general-ultraviolet galaxies-galaxies jets 
Joint fit of Warm Absorbers in COS and HETG spectra of NGC 3783
《Research in Astronomy and Astrophysics》2017年第9期71-80,共10页Xiao-Dan Fu Shui-Nai Zhang Wei Sun Shu Niu Li Ji 
the supports from the China Scholarship Council;the NSFC grants 11203080 and 11573070;supported by the 100 talents program of the Chinese Academy of Sciences
Warm Absorbers （WAs）, as an important form of AGN outflows, show absorption in both the UV and X-ray bands. Using XSTAR generated photoionization models, for the first time we present a joint fit to the simultaneous...
关键词：GALAXIES individual （NGC 3783） - quasars absorption lines - ultraviolet galaxies - X-ray GALAXIES 
Multiwavelength study of nearly face-on low surface brightness disk galaxies被引量：1
《Research in Astronomy and Astrophysics》2010年第12期1223-1241,共19页Dong Gao Yan-Chun Liang Shun-Fang Liu Guo-Hu Zhong Xiao-Yan Chen Yan-Bin Yang Francois Hammer Guo-Chao Yang Li-Cai Deng Jing-Yao Hu 
supported by the National Natural Science Foundation of China (Grant Nos. 10933001, 10973006, 10973015 and 10673002);the National Basic Research Program of China (973 Program;Nos. 2007CB815404 and 2007CB815406);the Young Researcher Grant of National Astronomical Observatories, Chinese Academy of Sciences
We study the ages of a large sample （1802） of nearly face-on disk low surface brightness galaxies （LSBGs） using the evolutionary population synthesis （EPS） model PEGASE with an exponentially decreasing star form...
关键词：galaxies： evolution -- galaxies： formation -- galaxies： photometry --galaxies： spiral -- galaxies： statistics -- ultraviolet： galaxies 
A statistical study of the relation between soft X-ray excess and accretion disk被引量：1
《Science China(Physics,Mechanics & Astronomy)》2010年第S1期102-105,共4页LIU JieYing1,2,3 & QIAO ErLin1,2 1 National Astronomical Observatories/Yunnan Observatory,Chinese Academy of Science,Kunming 650011,China 2 Key Laboratory for the Structure and Evolution of Celestial Objects,Chinese Academy of Sciences,Kunming 650011,China 3 Graduate University of Chinese Academy of Sciences,Beijing 100049,China 
supported by the National Basic Research Program of China (Grant No. 2009CB824800);the National Natural Science Foundation of China (Grant Nos. 10533050 and 10773028)
To study the origin of the soft X-ray excess,we compile a sample of 94 unobscured,radio-quiet QSOs and Seyfert galaxies with available data from GALEX and ROSAT.We find that 50 sources show strong soft X-ray excess an...
关键词：accretion:accretion DISKS ultraviolet:galaxies X-rays:galaxies 
Estimating Black Hole Masses of AGNs using Ultraviolet Emission Line Properties被引量：1
《Chinese Journal of Astronomy and Astrophysics》2006年第4期396-410,共15页Min-Zhi Kong Xue-Bing Wu Ran Wang Jin-Lin Han 
Supported by the National Natural Science Foundation of China.
Based on measured broad line region sizes in the reverberation-mapping AGN sample, two new empirical relations are introduced to estimate the central black hole masses of radio-loud high-redshift （z 〉 0.5） AGNs. Fi...
关键词：galaxies： nucleus -- galaxies： high-redshift-- quasars： emission lines -- ultraviolet： galaxies 
THIN DISK MODELS FOR THE ULTRAVIOLET EXCESS OF QUASARS AND SEYFERT 1 GALAXIES
《Chinese Science Bulletin》1986年第19期1316-1319,共4页杨兰田 刘超 杨丕博 
Sufficient data show that there is a typical continuum of a power law from infrared to visual wavelengths in quasars and Seyfert 1 galaxies (F∝v^2, α is about—1)and such distribution can extrapolate to X-ray wave b...
关键词：ULTRAVIOLET GALAXIES adding radius continuum body EXCESS galaxy RADIATIVE stationary 
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