一个分子爱因斯坦环：对围绕类星体的星暴盘进行成像。

A molecular Einstein ring: imaging a starburst disk surrounding a quasi-stellar object.

作者信息

Carilli C L, Lewis G F, Djorgovski S G, Mahabal A, Cox P, Bertoldi F, Omont A

机构信息

National Radio Astronomy Observatory, Post Office Box O, Socorro, NM 87801, USA.

出版信息

Science. 2003 May 2;300(5620):773-5. doi: 10.1126/science.1082600. Epub 2003 Apr 3.

DOI:10.1126/science.1082600

PMID:12677071

Abstract

Images of the molecular CO 2-1 line emission and the radio continuum emission from the redshift 4.12 gravitationally lensed quasi-stellar object (QSO) PSS J2322+1944 reveal an Einstein ring with a diameter of 1.5". These observations are modeled as a star-forming disk surrounding the QSO nucleus with a radius of 2 kiloparsecs. The implied massive star formation rate is 900 solar masses per year. At this rate, a substantial fraction of the stars in a large elliptical galaxy could form on a dynamical time scale of 108 years. The observation of active star formation in the host galaxy of a high-redshift QSO supports the hypothesis of coeval formation of supermassive black holes and stars in spheroidal galaxies.

摘要

来自红移为4.12的引力透镜类星体（QSO）PSS J2322+1944的分子CO 2-1线发射和射电连续谱发射图像显示出一个直径为1.5英寸的爱因斯坦环。这些观测结果被模拟为一个围绕类星体核心、半径为2千秒差距的恒星形成盘。由此推断的大质量恒星形成率为每年900个太阳质量。按照这个速率，在一个大型椭圆星系中，相当一部分恒星可以在10^8年的动力学时间尺度上形成。在高红移类星体宿主星系中观测到的活跃恒星形成支持了球状星系中超大质量黑洞和恒星同时形成的假说。