Molecular absorptions in high-z objects
Molecular absorptions in high-z objects
复制标题
高z物体中的分子吸收
DOI：
--
复制
发表时间：
2007
期刊：
影响因子：
--
通讯作者：
F. Combes
中科院分区：
文献类型：
--
作者：
F. Combes
摘要
Abstract
Molecular absorption lines measured along the line of sight of distant quasars are important probes of the gas evolution in galaxies as a function of redshift. A review is made of the handful of molecular absorbing systems studied so far, with the present sensitivity of mm instruments. They produce information on the chemistry of the ISM at z∼1, the physical state of the gas, in terms of clumpiness, density and temperature. The CMB temperature can be derived as a function of z, and also any possible variations of fundamental constants can be constrained. With the sensitivity of ALMA, many more absorbing systems can be studied, for which some predictions and perspectives are described.