天文研究与技术－国家天文台台刊
天文研究與技術－國傢天文檯檯刊
천문연구여기술－국가천문태태간
ASTRONOMICAL RESEARCH & TECHNOLOGY-PUBLICATIONS OF NATIONAL ASTRONOMICAL OBSERVATORIES OF CHINA
2011年
3期
205-212
,共8页
类星体%发射线%红外%尘埃
類星體%髮射線%紅外%塵埃
류성체%발사선%홍외%진애
Quasars%Emission line%Infrared%Dust
分析了42个类星体的SPITZER IRS中红外光谱,并测量了连续谱和各发射特征强度,其中包括5.5 μm连续谱强度、10 μm silicate发射,和窄发射线[S Ⅳ]10.5 μm,[Ne V]14.3 μm,[Ne Ⅲ]15.6μm,和[O Ⅳ]25.9 μm的流量.5.5 μm连续谱强度和窄发射线强度之间存在很强的相关关系,说明5.5μm连续谱也由活动星系核中心光子直接激发,并可以作为活动星系核强度的示踪.发现10μm silicate发射与Eigenvector Ⅰ没有相关关系,说明类星体中大多数的尘埃不可能与窄线区共存.
分析瞭42箇類星體的SPITZER IRS中紅外光譜,併測量瞭連續譜和各髮射特徵彊度,其中包括5.5 μm連續譜彊度、10 μm silicate髮射,和窄髮射線[S Ⅳ]10.5 μm,[Ne V]14.3 μm,[Ne Ⅲ]15.6μm,和[O Ⅳ]25.9 μm的流量.5.5 μm連續譜彊度和窄髮射線彊度之間存在很彊的相關關繫,說明5.5μm連續譜也由活動星繫覈中心光子直接激髮,併可以作為活動星繫覈彊度的示蹤.髮現10μm silicate髮射與Eigenvector Ⅰ沒有相關關繫,說明類星體中大多數的塵埃不可能與窄線區共存.
분석료42개류성체적SPITZER IRS중홍외광보,병측량료련속보화각발사특정강도,기중포괄5.5 μm련속보강도、10 μm silicate발사,화착발사선[S Ⅳ]10.5 μm,[Ne V]14.3 μm,[Ne Ⅲ]15.6μm,화[O Ⅳ]25.9 μm적류량.5.5 μm련속보강도화착발사선강도지간존재흔강적상관관계,설명5.5μm련속보야유활동성계핵중심광자직접격발,병가이작위활동성계핵강도적시종.발현10μm silicate발사여Eigenvector Ⅰ몰유상관관계,설명류성체중대다수적진애불가능여착선구공존.
We analyzed the SPITZER IRS mid-infrared spectra of a sample of 42 quasars. We measure continua and emission-line features, including continua near 5.5 μm, 10 μm silicateemission feature, and several narrow emission lines ( [S Ⅳ] 10. 5 μm, [Ne V] 14.3 μm, [Ne Ⅲ] 15.6 μm, and [O Ⅳ] 25.9 μm). There exists a strong correlation between 5.5 μm continuum flux and the narrow emission-line fluxes, indicating that the 5.5 μm continuum is also powered directly by AGN photons and its flux can be used as a valid indicator of AGN power. We find no correlation between Eigenvector Ⅰ and 10 μm silicate-emission feature in Mid-IR, implying that in quasars most of dust cannot exist in or close to narrow-line regions.
