红移3.91类星体APM 08279+5255的Spitzer/IRS观测
天体物理学
2007-05-23 v1
摘要
在Spitzer空间望远镜(SST)上，红外光谱仪(IRS)用于获得APM08279+5255(z=3.91)尘埃和气体丰富类星体的低分辨率和中等分辨率光谱。探测到9.235和6.315微米处的氢broad Paschen α和β复合线，以及覆盖观测(rest frame)5.3-35微米(1.08-7.1微米)波段的强红continuum，呈平滑power law。观测到的Pα/Pβ线flux比为1.05±0.2，远离case B值约为2的典型值，也远离高密度高optical厚度 ionized气体区域(~1.8)的简单模型。这一偏离与预期的衰减效应相反。在光谱中未发现3.3微米或6.2微米发射特征，这些特征通常归因于本地宇宙中气体丰富星系的芳香烃。与APM08279+5255的高亮度AGN性质相一致。
关键词
引用
@article{arxiv.astro-ph/0406151,
title = {Spitzer/IRS Observations of the Redshift 3.91 quasar APM 08279+5255},
author = {B. T. Soifer and V. Charmandaris and B. R. Brandl and L. Armus and P. N. Appleton and M. J Burgdorf and D. Devost and T. Herter and S. J. U. Higdon and J. L. Higdon and J. R. Houck and C. R. Lawrence and P. W. Morris and H. I. Teplitz and K. I. Uchida and J. van Cleve and D. Weedman},
journal= {arXiv preprint arXiv:astro-ph/0406151},
year = {2007}
}
备注
Accepted in ApJ Sup. Spitzer Special Issue, 4 pages, 1 figure