We present spectral results from a multi-satellite, broad-band campaign on the Narrow-line Seyfert 1 galaxy Ton S180 performed at the end of 1999. We discuss the spectral-energy distribution of the source, combining simultaneous Chandra, ASCA and EUVE data with contemporaneous FUSE, HST, and ground-based optical and infra-red data. The resulting SED shows that most of the energy is emitted in the 10 -- 100 eV regime, which must be dominated by the primary energy source. No spectral turnover is evident in the UV regime. This, the strong soft X-ray emission, and the overall shape of the SED indicate that emission from the accretion disk peaks between 15 and 100 eV. High resolution FUSE spectra showing UV absorption due to O VI and the lack of detectable X-ray absorption in the Chandra spectrum demonstrate the presence of a low column density of highly ionized gas along our line-of-sight. The highly-ionized state of the circumnuclear gas is most likely linked to the high luminosity and steep spectrum of the active nucleus. Given the strong ionizing flux in Ton S180, it is possible that the clouds within a few tens of light days of the central source are too highly ionized to produce much line emission. Thus the narrow width of the emission lines in Ton S180 is due to the emission arising from large radii.
翻译:我们介绍了1999年底在Nrow-line Seyfert 1 Sn S180 星系Ton S180上进行的多卫星、宽频谱运动的光谱结果。我们讨论了源的光谱能量分布,将Chandr、ASCA和EVE的同步光学和红外线数据与当时的FUSE、HST以及地面光学和红外线数据相结合。由此产生的SEDD显示,大部分能量是在10-100 eV系统中排放的,这必须由主要能源源主导。紫外线系统没有显示光谱变化。这强烈的软X射线排放和SEDED的总体形状表明,15至100 eV之间冠状磁盘磁盘磁盘峰的排放与当时的同步、AUSE光谱数据结合,显示由于OVI吸收紫外线,紫外线光谱中缺少可探测的X射线吸收度,表明沿着我们视线的高度电离子气体的低柱密度。环核气体的高离子状态最有可能与高的光线高光度和高射线辐射射线的直径射线的直射波波频谱与活跃核心的低射线的射线相交织是。鉴于高的光线至高射线至高射线至高射线中高的光流的光波波波流至高射波波流至高射波流至高射波。