[P-PS04] [EJ] アルマによる惑星科学の新展開

[PPS04-P03] 原始惑星系円盤表層部における炭素ダスト燃焼の観測的検証法

*野村 英子¹、Wei Chen-En¹、Ip Wing-Huen²、Lee Jeong-Eun³ (1.東京工業大学理学院地球惑星科学系、2.国立中央大学、3.Kyung Hee University)

キーワード：原始惑星系円盤、炭素欠乏

Molecular line observations tell us information of not only chemical but also physical properties of protoplanetary disks. ALMA has made it possible to detect complex organic molecules in the disks. In addition, our ALMA observations of CO isotopologue lines show CO gas depletion even inside the CO snowline, which suggests formation of larger and less volatile species on grain surface. In addition, our model calculations predict that destruction of carbon grains in hot surface layer very close to the central star will lead to formation of more carbon-bearing species and it can be testable by ALMA observations.