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Small scale structure in diffuse molecular gas from repeated FUSE and visible spectra of HD 34078

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Abstract

We present preliminary results from an ongoing program devoted to a study of small scale structure in the spatial distribution of molecular gas. Our work is based on multi-epoch FUSE and visible observations of HD34078. A detailed comparison of H2, CH and CH+ absorption lines is performed. No short term variations are seen (except for highly excited H2) but long-term changes in N(CH) are clearly detected when comparing our data to spectra taken about 10 years ago.

Dates and versions

hal-00010081 , version 1 (08-10-2005)

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Patrick Boisse, Emmanuel Rollinde, Franck Le Petit, Guillaume Pineau Des Forets, Evelyne Roueff, et al.. Small scale structure in diffuse molecular gas from repeated FUSE and visible spectra of HD 34078. 2001. ⟨hal-00010081⟩
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