Exploring Terrestrial Planet-forming Zones in Protoplanetary Disks with CO Line Profiles
First Author:
Jeanette Bast
Email: bast AT strw.leidenuniv.nl
Leiden Observatory, Leiden University
Niels Bohrweg 2
Leiden, 2300 RA, The Netherlands
Coauthors:
Pontoppidan, Klaus M., California Institute of Technology
van Dishoeck, Ewine F., Leiden Observatory, Leiden University
Abstract
We present results from a large VLT program designed to provide information about the physical structure of the gas in the terrestrial planet-forming zones of protoplanetary disks. This inner gaseous region (radii less than 10 AU) can now be explored in unprecedented detail with the new high spectral resolution (R = 100 000) spectrometer CRIRES at the VLT. We clearly resolve the CO (4.7 micron) line profiles in our sample of more than 50 protoplanetary disks in different evolutionary phases and clouds. Surprisingly, 9 of these sources show single peaked line profiles where a Keplerian profile is expected. We here present a study of the single peaked CO lines and try to explain their origin. These results will be put in the context of the evolutionary phase of the disk, e.g. heavy accretor or not.
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