Zou Xianghua1; Xue Shijian2
Source Publicationchinesejournalofastronomyandastrophysics
AbstractASCA observations of the two Type Ⅱ AGNs,NGC7314 and NGC 7582,show clear variations in the broad X-ray band(0.4-10keV)on short timescales-10^4s.Spectral analysis indicates that they bot have an absorbed hard X-ray component and an unabsorbed soft“excess” component.To clarify the origin of the latter,we made a cross-correlation analysis of the two components.The results show that,for NGC7314,the soft X-ray variability is proportional to that of the hard X-ray component.This indicates that the active nucleus of NGC 7314 must be partially covered and so the soft emission is a “leaking” of the variable hard component.For NGC 7582,there is no detectable variability in the soft component, although there is a definite one in the hard component.This indicates that the variable nucleus of NGC 7582 must be fully blocked by absorbing matter,and the soft emission is most likely the scattered component predicted by the AGN unified model.
Document Type期刊论文
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Zou Xianghua,Xue Shijian. thevariabilitiesofthesoftandhardxraycomponentsofngc7314andngc7582andthedistributionofabsorbingmatterintypeagns[J]. chinesejournalofastronomyandastrophysics,2002,002(004):352.
APA Zou Xianghua,&Xue Shijian.(2002).thevariabilitiesofthesoftandhardxraycomponentsofngc7314andngc7582andthedistributionofabsorbingmatterintypeagns.chinesejournalofastronomyandastrophysics,002(004),352.
MLA Zou Xianghua,et al."thevariabilitiesofthesoftandhardxraycomponentsofngc7314andngc7582andthedistributionofabsorbingmatterintypeagns".chinesejournalofastronomyandastrophysics 002.004(2002):352.
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