标题： 高分辨率尖端/倾斜近红外成像研究温暖超明亮红外星系 显示英文标题

标题： High Resolution Tip/Tilt Near-Infrared Imaging of Warm Ultraluminous Infrared Galaxies

摘要： 我们呈现了完整样本的超亮红外星系的高空间分辨率H和K'波段图像，这些星系被选择为具有已知属于活动星系特征的温暖中红外颜色。 每个系统中都检测到了扩展的宿主星系，以及潮汐特征和许多在光学波长下看到的恒星形成结。 虽然一些这些结具有相当大的近红外过量，但我们表明它们的总辐射光度可能更类似于在较不强烈的远红外光度相互作用系统中看到的具有相似光学形态的扩展星暴。 我们发现每个ULIG在长波长上的贡献来自一个非常紧凑的源，我们将其识别为主动星系核。 我们表明这些潜在核的光学/近红外颜色比最活跃的星暴IRAS星系更加极端，但与“远红外响亮”的类星体相同，而这些类星体本身与光学类星体和大量热尘埃结合类似。 一半的ULIG的核具有消红移的近红外光度与类星体相当，而另一半的消红移光度则更类似于塞弗特星系，尽管这可能是由于斑块状消光和散射的效果。 显示英文摘要

摘要： We present high spatial resolution H and K'-band images of a complete sample of ultraluminous infrared galaxies selected to have warm mid-infrared colors known to be characteristic of active galaxies. The extended underlying galaxy is detected in each system, as are tidal features and many of the star-forming knots seen at optical wavelengths. While some of these knots have a considerable near-infrared excess, we show that they are likely to have bolometric luminosities more similar to that of the extended starbursts with similar optical morphology seen in less far-infrared luminous interacting systems. We find that each ULIG has increasing contributions at long wavelengths by a very compact source which we identify as an active galactic nucleus. We show that the optical/near-infrared colors of these putative nuclei are much more extreme than the most active starburst IRAS galaxies, yet are identical to "far-infrared loud" quasars which are in turn similar to optical quasars combined with large quantities of hot dust. Half of the ULIGs have nuclei with dereddened near-infrared luminosities comparable to those of QSOs, while the other half have dereddened luminosities more similar to Seyferts, although this may be an effect of patchy extinction and scattering.