A search for molecules in damped Lyman-alpha absorbers occulting millimetre-loud quasars

被引：8

作者：

Curran, SJ ^{[1
]}

Murphy, MT

Webb, JK

Rantakyrö, F

Johansson, LEB

Nikolic, S

机构：

[1] Univ New S Wales, Sch Phys, Sydney, NSW 2052, Australia

[2] European So Observ, Santiago 19, Chile

[3] Univ Chile, Observ Cerro Calan, Santiago, Chile

[4] Chalmers Univ Technol, Onsala Space Observ, S-43992 Onsala, Sweden

[5] Astron Observ, YU-11160 Belgrade, Serbia, Yugoslavia

来源：

ASTRONOMY & ASTROPHYSICS | 2002年 / 394卷 / 03期

关键词：

quasars : absorption lines; cosmology : observations; cosmology : early Universe;

D O I：

10.1051/0004-6361:20021231

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We have used the SEST 15-metre and Onsala 20-metre telescopes to perform deep (rms greater than or similar to 30 mJy) integrations of various molecular rotational transitions towards damped Lyman-alpha absorption systems (DLAs) known to occult millimetre-loud quasars. We have observed 6 new systems and improved the existing limits for 11 transitions. These limits may be approaching the sensitivities required to detect new systems and we present a small number of candidate systems which we believe warrant further observation.

引用

页码：763 / 768

页数：6

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