Water ice self-absorption in three Ophiuchus edge-on disks

Details Water ice self-absorption in three Ophiuchus edge-on disks Water ice self-absorption in three Ophiuchus edge-on disks

Feb 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008noao.prop..286d&link_type=abstract

NOAO Proposal ID #2008A-0286

Physics

Scientific paper

We propose to use NIRI to measure the depth and shape of the 3(micron) water ice absorption feature in three edge-on disks in the Ophiuchus molecular cloud. This will provide us with an estimate of the total column density of ice in these disks and an indication of the thermal processing it has experienced. In protoplanetary disks, water ice coats dust grains in the majority of the disk volume and plays a major role in favoring grain-grain sticking during collisions, a key phenomenon towards the formation of planetesimals. In edge-on disks, the disk near- infrared thermal radiation, arising from the innermost regions, provides a continuous background that can be absorbed by water ice in the cold outer regions of the disks. These systems therefore offer a unique opportunity to probe water ice in protoplanetary disks. The proposed observations will double the number of edge-on disks with detected water ice absorption and represent the first such observations in the Ophiuchus molecular cloud.

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