H_2 molecules in damped systems

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dc.creatorSrianand, R.
dc.creatorPetitjean, P.
dc.creatorLedoux, C.
dc.date2001-09-10
dc.date.accessioned2026-07-07T01:59:55Z
dc.date.available2026-07-07T01:59:55Z
dc.descriptionDamped Lyman alpha systems seen in the spectra of high-z QSOs arise in high-density neutral gas in which molecular hydrogen (H_2) should be conspicuous. Systematic searches to detect the H_2 lines redshifted into the Lyman alpha forest at <3400Åare now possible thanks to the unique capabilities of UVES on the VLT. Here we summarise the present status of our on going programme to search for H_2 in DLAs, discuss the physical conditions in the systems where H_2 is detected and the implications of non-detections.
dc.description4 pages. To appear in the Proceedings of the XVII IAP Colloquium "Gaseous Matter in Galaxies and Intergalactic Space"
dc.identifierhttps://arxiv.org/abs/astro-ph/0109155
dc.identifierhttp://arxiv.org/abs/astro-ph/0109155
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/3303
dc.subjectAstrophysics
dc.titleH_2 molecules in damped systems
dc.typetext

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