DIGIT survey of far-infrared lines from protoplanetary disks

We present far-infrared (50−200 μm) spectroscopic observations of young pre-main-sequence stars taken with Herschel/PACS as part of the DIGIT key project. The sample includes 16 Herbig AeBe and 4 T Tauri sources observed in SED mode covering the entire spectral range. An additional 6 Herbig AeBe and...

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Bibliographic Details
Published in:Astronomy and astrophysics (Berlin) 2013-11, Vol.559
Main Authors: Fedele, D., Bruderer, S., van Dishoeck, E. F., Carr, J., Herczeg, G. J., Salyk, C., Evans, N. J., Bouwman, J., Meeus, G., Henning, Th, Green, J., Najita, J. R., Güdel, M.
Format: Article
Language:English
Subjects:
astrochemistry
Herbig Ae/Be
protoplanetary disks
stars: variables: T Tauri
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Summary:We present far-infrared (50−200 μm) spectroscopic observations of young pre-main-sequence stars taken with Herschel/PACS as part of the DIGIT key project. The sample includes 16 Herbig AeBe and 4 T Tauri sources observed in SED mode covering the entire spectral range. An additional 6 Herbig AeBe and 4 T Tauri systems have been observed in SED mode with a limited spectral coverage. Multiple atomic fine structure and molecular lines are detected at the source position: [O i], [C ii], CO, OH, H2O, CH+. The most common feature is the [O i] 63 μm line detected in almost all of the sources, followed by OH. In contrast with CO, OH is detected toward both Herbig AeBe groups (flared and non-flared sources). An isothermal LTE slab model fit to the OH lines indicates column densities of 1013 
ISSN:0004-6361
1432-0746
DOI:10.1051/0004-6361/201321118