Protostars and Planets VI, Heidelberg, July 15-20, 2013

Poster 2B017

Gas signatures of Herbig Ae/Be disks probed with Herschel SPIRE spectroscopy

van der Wiel, Matthijs H. D. (Institute for Space Imaging Science, Department of Physics and Astronomy, University of Lethbridge, Lethbridge, AB, Canada)
Naylor, David A. (Institute for Space Imaging Science, Department of Physics and Astronomy, University of Lethbridge, Lethbridge, AB, Canada)
Aresu, Giambattista (Kapteyn Astronomical Institute, University of Groningen, Groningen, The Netherlands)
Olofsson, Göran (Stockholm University, Stockholm, Sweden)

Abstract:
Herbig Ae/Be objects, like their lower mass counterparts T Tauri stars, are seen to form a stable circumstellar disk which is initially gas‐rich and could ultimately form a planetary system. We study gas in a sample of young Herbig disks: AB Aur, HD100546, HD97048, HD163296, T Tau, HD142527, HD144432, RY Tau, HD104237, HD36112, HD169142, HD100453 and TW Hya. Of these, five show detectable line signal identified as, e.g., CO, HCN, H2O, neutral C. For CO, the rotational transitions observed with Herschel SPIRE cover energy levels from ~50 to 500 K, bridging the gap between ground-based (sub)millimeter observations and higher excitation lines observed with ISO or Herschel PACS.

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