Probing CO freeze-out and desorption in protoplanetary disks
Qi, Chunhua
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https://hdl.handle.net/2142/96984
Description
Title
Probing CO freeze-out and desorption in protoplanetary disks
Author(s)
Qi, Chunhua
Issue Date
2017-06-21
Keyword(s)
Atacama Large Millimeter/submillimeter Array (ALMA)'s molecular view
Abstract
Snow lines, the boundaries where the most abundant volatiles such as_x000d_
H$_2$O, CO$_2$ and CO freeze out from the gas phase onto dust grains _x000d_
in the midplane of protoplanetary disks, are believed to play an_x000d_
important role in planet formation and composition. Locating the CO_x000d_
snow line is challenging in disks. This has prompted an exploration of chemical signatures of CO freeze-out and desorption. We present ALMA_x000d_
observations of the CO, N$_2$H$^+$ and DCO$^+$ emission to _x000d_
probe the CO freeze-out and desorption in protoplanetary disks, and_x000d_
evaluate their utility as tracers of the CO snow line location._x000d_
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