The Connection Between Quasars and Starbursts

最近的观测表明，在遥远的类星体宿主星系中，中心超大质量黑洞和恒星膨胀是共同演化的，这与本地球体中这两个分量的强相关性是一致的。(亚)毫米和射电观测为研究高红移星系的恒星形成特性提供了强有力的手段。通过对热尘埃光谱能量分布的远红外测量，以及对主要气体示踪剂(CO、HCN、C、C+)的观测，我们建议继续我们的成功计划，在经过精心挑选的类星体样本中研究恒星形成和致密气体。这样的观测还限制了这些高能系统的动力学质量，这对星系的早期形成施加了独特的限制。通过亚毫米级和射电连续谱测量，我们希望决定性地证明，恒星形成是导致在很大一部分类星体中观测到的远红外辐射的主要能量来源，并且恒星爆发是类星体中普遍存在的一种共生现象。对类星体的亚毫米到射电观测进一步为我们提供了一种独特的方法来研究最早的星系的性质，一直追溯到再电离时代(z&gt；6)。

Recent observations have suggested a co-evolution of the centralsupermassive black holes and the stellar bulges in distantQSO host galaxies, consistent with the strong correlation ofboth components in local spheroids. (Sub)millimeter and radioobservations provide powerful means to investigate the starforming properties of high redshift galaxies. Through (restframe)far-infrared measurements of the warm dust spectralenergy distribution, and through observations of key gas tracers(CO, HCN, C, C+), we propose to continue our successfulprogram to investigate star formation and the dense gas in acarefully selected sample of QSOs. Such observations also constrainthe dynamical masses of these energetic systems, whichputs unique constraints on the early formation of galaxies.With submillimeter and radio continuum measurements we like todemonstrate decisively that star formation is the main energysource causing the observed far-IR emission in a large fractionof all QSOs, and that starbursts are an ubiquitous and coevalphenomena in QSOs. Submillimeter to radio observations of QSOsfurther provide us with a unique way to study the properties ofthe earliest galaxies, way back into the Epoch of Reionization(z>6).