Deuterium Enrichment in PAHs

Details Deuterium Enrichment in PAHs Deuterium Enrichment in PAHs

Sep 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004sptz.prop...45r&link_type=abstract

Spitzer Proposal ID #45

Physics

Scientific paper

Laboratory studies have indicated that under interstellar radiation condition the hydrogen atoms in PAH molecules will be replaced in time by deuterium. This investigation will gather evidence for this process by examining the PAH spectral features in a number of regions with quite different ages, ranging from proto-planetary nebulae, through planetary nebulae of various ages, on out to older PAH material in molecular clouds. The presence of deuterium in the PAH molecules dramatically shifts the locations of the spectral features, so that they can be detected with the IRS instrument. Since these objects are generally extended and sensitivity to very weak features is needed, observations will be made both on the targets and on nearby background sky.

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