New Light on Young Stars:
Spitzer's View of Circumstellar Disks

Spatially resolved 4.7 micron CO fundamental emission in two protoplanetary disks

First Author:
G. vanderPlas
Email: g.vanderplas AT uva.nl
University of Amsterdam
Kruislaan 403
Amsterdam, 1098 SJ, The Netherlands
Coauthors:
van den Ancker, M.E., ESO Garching
Acke, B., KU Leuven
Carmona, A., Observatoire de Geneve
Dominik, C., University of Amsterdam
Fedele, D., MPIA Heidelberg
Waters, L.B.F.M., University of Amsterdam

Abstract
We present high-spectral-resolution 4.6-5.1 um spectra of HD 100546 and HD 97048 containing fundamental CO emission taken with the CRIRES on the VLT. We resolve, spectrally and spatially, the emission of the ¹³CO v(1-0) vibrational band and the ¹²CO v(1-0), v(2-1), v(3-2) and v(4-3) vibrational bands in both targets, as well as the ¹²CO v(5-4) band in HD 100546. Using these data, we constrain the emitting regions in two independent ways. First by modeling the kinematics of the spectral line profiles, and secondly using astrometry.
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