Search for Interstellar Water in Translucent Molecular Clouds

Astronomy and Astrophysics – Astronomy

Scientific paper

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Hst Proposal Id #6739 Interstellar Medium

Scientific paper

We propose to search for ultraviolet line absorption due tointerstellar water in the translucent molecular clouds whichlie in front of the stars HD169454 and HD154368, using Echelle-A of the Goddard High Resolution Spectrograph. The proposedobservations will provide a crucial test of astrochemicalmodels for the formation and destruction of interstellarwater; such models predict that the proposed observations willlead to the first detection of water (and the first detectionof any polyatomic molecule) in the diffuse interstellarmedium.

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