A VLA search for CO and HCN emission from z=4 quasars

被引：6

作者：

Barvainis, R ^{[1
]}

Antonucci, R ^{[1
]}

机构：

[1] UNIV CALIF SANTA BARBARA,DEPT PHYS,SANTA BARBARA,CA 93106

来源：

PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC | 1996年 / 108卷 / 720期

关键词：

D O I：

10.1086/133708

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

A search for CO(1-0) line emission from nine quasars and one radio galaxy at Z approximate to 4 has been conducted using the VLA. Also, one quasar at z = 4.7 was searched for HCN(1-0) emission. Velocity coverage was >2000 km s(-1) in all cases. No detections were obtained, with upper limits on peak line flux densities in the 2-5 mJy/beam range. Corresponding upper limits on molecular gas masses are typically several X 1011 Mo., assuming the standard Galactic CO to H-2 conversion factor and a CO linewidth of 300 km s(-1).

引用

页码：187 / 189

页数：3

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