Insert Title Here
First Author:
Fred Lahuis
Email: F.Lahuis AT sron.nl
SRON / Leiden Observatory
P.O. Box 800
NL-9700 AV Groningen, The Netherlands
Coauthors:
Blake, Geoffrey A., Caltech
Evans II, Neal, University of Texas
Jørgensen, Jes K., Argelander-Institute for Astronomy, University of Bonn
Pontoppidan, Klaus M., Caltech
Salyk, Colette, Caltech
van Dishoeck, Ewine F., Leiden Observatory, Leiden University
Abstract
Recent Spitzer InfraRed Spectrograph (IRS) detections of water and organic molecules in protoplanetary disks (Carr & Najita 2008, Salyk et al. 2008) represent a turning point in the study of the physical and chemical development of terrestrial planet-forming regions. Here we present Spitzer-IRS spectra obtained from the ``cores to disks'' (c2d) Legacy program, which demonstrate a high detection rate for hot (T ~1000 K) water vapor emission lines in the 10-20 um region covered by the ShortHi module. We also present complementary ground-based L-band (~ 3 um) observations obtained with NIRSPEC (R ~25,000) on the Keck II telescope and CRIRES (R ~100,000) at the VLT at sufficiently high spectral resolution to measure the line shapes and thus constrain the emitting locations in the disks. Preliminary results suggest a variety ofmolecular abundance ratios, which may indicate differences in disk evolutionary states, or intrinsic differences between sources. We explore and present these possibilities and other characteristics of this rich sample. Finally, we discuss these results in the context of ongoing GO-5 IRS observations designed to span an expansive range in disk activity and physical state at high S/N (program PID 50641, J. Carr, Principal Investigator).
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