Heating the Gas in Photodissociation Fronts

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dc.creatorDraine, B. T.
dc.creatorBertoldi, F.
dc.date1999-02-26
dc.date.accessioned2026-07-07T02:30:37Z
dc.date.available2026-07-07T02:30:37Z
dc.descriptionISO has provided us with a new perspective on gas temperatures in photodissociation regions through measurements of line emission from rotationally-excited levels of the H_2 molecule. The H_2 rotational level populations provide a thermal probe, showing that gas temperatures T_gas approx 500-1000 K prevail in a portion of the PDR where significant quantities of H_2 are present. Such high gas temperatures were unexpected. Theoretical models for the S140 PDR are presented. Possible mechanisms for heating the gas to such high temperatures are discussed.
dc.descriptionLatex, 7 pages, 8 figs, uses iso98.sty (included). To appear in The Universe as Seen by ISO
dc.identifierhttps://arxiv.org/abs/astro-ph/9902379
dc.identifierhttp://arxiv.org/abs/astro-ph/9902379
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/13873
dc.subjectAstrophysics
dc.titleHeating the Gas in Photodissociation Fronts
dc.typetext

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