The blueshifted Pa alpha broad line component and the origin of strong iron emission in the ultraluminous infrared galaxy IRAS 07598+6508
The blueshifted Pa alpha broad line component and the origin of strong iron emission in the ultraluminous infrared galaxy IRAS 07598+6508
复制标题
超亮红外星系 IRAS 07598 6508 中蓝移的 Pa α 宽线分量和强铁发射的起源
DOI：
10.1086/116975
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发表时间：
1994
期刊：
影响因子：
--
通讯作者：
Y. Sato
中科院分区：
文献类型：
--
作者：
Y. Taniguchi;K. Kawara;T. Murayama;Y. Sato
我们提出了超发光红外星系（ULFIRG） IRAS 07598+6508的Pa α发射剖面，它是光学中异常强的Fe II发射器。Pa α发射谱线呈现蓝移宽分量（FWHM约为3900 km/sec）和窄核心（FWHM小于或等于530 km/sec）。宽线成分的存在强烈表明IRAS 07598+6508有一个活跃的星系核，支持Sanders等人（1988）提出的合并诱导类星体形成的假设，尽管我们不能排除超新星驱动的高速风的可能性。还报道了可能检测到（Fe II） 1.893微米的发射。结果表明，像IRAS 07598+6508这样的强Fe II发射体具有介于普通类星体和冷超发光红外星系之间的IRAS颜色特性。因此，我们提出了一个从冷超轻到热超轻和Fe - II超轻到类星体的进化联系。
We present the Pa alpha emission profile of the ultraluminous infrared galaxy (ULFIRG) IRAS 07598+6508 which is an unusually strong Fe II emitter in the optical. The Pa alpha emission line profile shows a blueshifted broad component (FWHM approximately equal to 3900 km/sec) together with a narrow core (FWHM less than or equal to 530 km/sec). The presence of the broad line component strongly suggests that IRAS 07598+6508 has an active galactic nucleus, supporting a scenario of merger-induced quasar formation proposed by Sanders et al. (1988), although we cannot rule out the possibility of a supernova-driven high speed wind. Possible detection of (Fe II) 1.893 micrometer emission is also reported. It is shown that strong Fe II emitters such as IRAS 07598+6508 have intermediate IRAS color properties between normal quasars and cold ultraluminous infrared galaxies. We thus suggest an evolutionary link from cold ULFIRG through warm ULFIRG and Fe II ULFIRG to quasars.