%0 Journal Article
%T Molecular hydrogen in absorption at high redshifts
%+ Institut d'Astrophysique de Paris (IAP)
%A Balashev, S. A.
%A Noterdaeme, P.
%< avec comité de lecture
%J Experimental Astronomy
%8 2022
%D 2022
%Z 2203.15582
%Z 2022ExA...tmp...28B
%R 10.1007/s10686-022-09843-y
%K Molecular hydrogen
%K Quasar absorption lines
%K Active galactic nuclei
%Z Sciences of the Universe [physics]Journal articles
%X Absorption lines from molecular hydrogen (H2) in the spectra of background sources are a powerful probe of the physical conditions in intervening cold neutral medium. At high redshift, z >2 , H2 lines are conveniently shifted in the optical domain, allowing the use of ground-based telescopes to perform high-resolution spectroscopy, which is essential for a proper analysis of the cold gas. We describe recent observational progress, based on the development of efficient pre-selection techniques in low-resolution spectroscopic surveys such as the Sloan Digital Sky Survey (SDSS). The next generation of spectrographs with high blue-throughput, such as CUBES, will certainly significantly boost the efficiency and outcome of follow-up observations. In this paper, we discuss high priority science cases for CUBES, building on recent H2 observations at high-z: probing the physical conditions in the cold phase of regular galaxies and outflowing gas from active galactic nucleus.
%G English
%L insu-03748289
%U https://insu.hal.science/insu-03748289
%~ INSU
%~ CNRS
%~ IAP
%~ SORBONNE-UNIVERSITE
%~ SORBONNE-UNIV
%~ SU-SCIENCES
%~ SU-TI
%~ ANR
%~ ALLIANCE-SU