2006/12/20 by J. Pety, Pety, Jérôme, J. R. Goicoechea +13
Agricultural and Biological Sciences · Chemistry · Earth and Planetary Sciences · #Astrophysics (astro-ph) #Atmospheric Ozone and Climate #FOS: Physical sciences #Pharmacological Effects and Assays #Spectroscopy and Laser Applications
paper · pdf · doi:10.48550/arxiv.astro-ph/0612588
openalex publication_date 2006/12/20 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/01
To prepare for the unprecedented spatial and spectral resolution provided by ALMA and Herschel/HIFI, chemical models are being benchmarked against each other. It is obvious that chemical models also need well-constrained observations that can serve as references. Photo-dissociation regions (PDRs) are particularly well suited to serve as references because they make the link between diffuse and molecular clouds, thus enabling astronomers to probe a large variety of physical and chemical processes. At a distance of 400 pc (1" corresponding to 0.002 pc), the Horsehead PDR is very close to the prototypical kind of source (i.e. 1D, edge-on) needed to serve as a reference to models.