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25 April 2024 |
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Effects of accretion flow on the chemical structure in the inner regions of protoplanetary disks | | H. Nomura
; Y. Aikawa
; Y. Nakagawa
; T.J. Millar
; | | Date: |
25 Oct 2008 | | Abstract: | We have studied the dependence of the profiles of molecular abundances and
line emission on the accretion flow in the hot ($ga 100$K) inner region of
protoplanetary disks. The gas-phase reactions initiated by evaporation of the
ice mantle on dust grains are calculated along the accretion flow. We focus on
methanol, a molecule that is formed predominantly through the evaporation of
warm ice mantles, to show how the abundance profile and line emission depend on
the accretion flow. Our results show that some evaporated molecules keep high
abundances only when the accretion velocity is large enough, and that methanol
could be useful as a diagnostic of the accretion flow by means of ALMA
observations at the disk radius of $la 10$AU. | | Source: | arXiv, 0810.4610 | | Services: | Forum | Review | PDF | Favorites | |
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