Active Galactic Nuclei

AST0098719安东尼活动星系核(AGN)是宇宙中最戏剧性的组成部分之一-它们发出惊人的能量(比明亮的星系多几个数量级)，辐射到巨大的电磁频谱上(从射电区域到硬X射线)，有时会产生大量相对论流动，作为粒子射流从它们的中心延伸数百万光年。这个项目涵盖了几个不同的项目。一组项目旨在确定不同类型的活动核的能源来源。它们包括对射电星系的中红外观测，以定位可以通过其废热看到的隐藏的活动星系核；在毫米光谱区域的光度测量，以查看光学暗淡的射电星系是否没有隐藏的光学活动星系核；以及在毫米波段的测绘和光谱，以确定引力透镜类星体。第二组项目包括对附近和高红移活动星系核的自适应光学观测，包括各向同性选择的塞弗特样本，以及用于提供宿主信息的高红移类星体和射电星系。该项目的资金由美国国家科学基金会银河系外天文和宇宙学计划(AST/EXC)提供。

ABSTRACT AST 0098719AntonucciActive galactic nuclei, (AGN) are some of the most dramatic components of the Universe---they emit prodigious amounts of power (as much as several orders of magnitude more than a bright galaxy), radiate it over a tremendous swath of the electromagnetic spectrum (from the radio region to hard X-rays), and sometimes generate bulk relativistic flows which emerge as jets of particles stretching for millions of light years from their centers. This project covers several different projects. One set of projects is directed at determining the energy source in different types of AGN. They include mid-infrared observations of radio galaxies, to locate hidden AGN which can be seen by their waste heat; photometry in the millimeter spectral regions, to see if optically dull radio galaxies have no hidden optical AGN; and mapping and spectroscopy in the mm waveband, to identify gravitational lensed quasars. The second set of projects involves adaptive optics observations of nearby and high-redshift AGN, including an isotropically selected Seyfert sample, and high redshift quasars and radio galaxies for host information.Funding for this project was provided by the NSF program for Extragalactic Astronomy & Cosmology (AST/EXC).***