In "The Molecular Universe", Proceedings of the 280th Symposium of the International Astronomical Union, 2011
astro-ph/1205.6489

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EXTRAGALACTIC LINE SURVEYS

Sergio Martin Ruiz


Abstract: 40 years have passed since the first molecular detection outside our Galaxy. Since then, our knowledge on the distribution, kinematics and composition of the molecular material in the extragalactic ISM has built up significantly based not only on the carbon monoxide observations but also in the more than 50 molecular species detected. In particular, line surveys have been proven to be excellent tools to study the chemical composition in the nuclei of galaxies. Such studies have been favored by the increasing instantaneous bandwidth of current mm and sub-mm facilities. Here I will summarize the highlights of extragalactic molecular spectroscopy, mostly focusing in the results from molecular line surveys published in the last few years as well as the aims of still ongoing projects.


Keywords. Astronomical data bases: surveys, Galaxies: abundances, Galaxies: active, Galaxies: ISM, Galaxies: starburst


Table of Contents

INTRODUCTION: CHEMICAL VARIATIONS IN GALACTIC NUCLEI

TARGETED VS. UNBIASED SURVEYS

RECEIVER BANDWIDTH UPGRADES: ONGOING SURVEYS

GOING WIDER: HIGH REDSHIFT WIDE BAND RECEIVERS

ABSORPTION SYSTEMS

THE CHEMISTRY IN THE ARP 220 ULIRG

MOLECULAR CENSUS EVOLUTION

HIGH RESOLUTION LINE SURVEYS

REFERENCES

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