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原始惑星系円盤の有機分子と硫黄系分子 ： モデルとALMA観測
野村, 英子;樋口, あや;坂井, 南美;山本, 智;長沢, 真樹子;田中, 今日子;三浦, 均;中本, 泰史;田中, 秀和;山本, 哲生;Walsh, Catherine;Millar, Tom J.
Permalink : http://hdl.handle.net/2115/77778
JaLCDOI : 10.14943/lowtemsci.78.165
KEYWORDS : 原始惑星系円盤;塵表面反応;化学反応ネットワーク;電波観測;protoplanetarydisks;grainsurfacereactions;chemicalreactionnetwork;radioobservations
Abstract
惑星は，原始惑星系円盤内のガスとダストから形成され，円盤内の化学進化を経て，我々の太陽系内物質が生成されたと考えられる．ALMAによる惑星形成領域の高解像度・高感度観測は，円盤からの様々なガス輝線の検出を可能にした．一方で，塵表面反応も含めた円盤内の詳細な化学反応モデルも構築され，円盤から惑星系への化学進化が明らかになりつつある．本稿では，特に塵表面反応により生成されると考えられている複雑な有機分子と硫黄系分子に焦点を当て，円盤からのメタノールの初検出も含め，モデルとALMA観測に関する研究を紹介する．
Planets are formed from gas and dust in protoplanetary disks, and it is thought that the materials in our Solar System were generated through chemical evolution taking place in a protoplanetary disk. The high-resolution and high-sensitivityobservationsofplanetformationregionsmadewithALMAhaveenabledthedetectionofvariousgas emission lines from protoplanetary disks. In addition, detailed chemical reaction models of protoplanetary disks, includingthedustsurfacereaction,havebeenestablished,andthechemicalevolutionfromdiskstoplanetarysystems is currently being revealed. In this paper, we will focus on complex organic molecules (COMs) and sulfur-bearing moleculesthatarethoughttobegeneratedthroughgrainsurfacereactionsandintroduceresearchonvariousmodels and ALMA observations, including the first detection of methanol in a protoplanetary disk.
Planets are formed from gas and dust in protoplanetary disks, and it is thought that the materials in our Solar System were generated through chemical evolution taking place in a protoplanetary disk. The high-resolution and high-sensitivityobservationsofplanetformationregionsmadewithALMAhaveenabledthedetectionofvariousgas emission lines from protoplanetary disks. In addition, detailed chemical reaction models of protoplanetary disks, includingthedustsurfacereaction,havebeenestablished,andthechemicalevolutionfromdiskstoplanetarysystems is currently being revealed. In this paper, we will focus on complex organic molecules (COMs) and sulfur-bearing moleculesthatarethoughttobegeneratedthroughgrainsurfacereactionsandintroduceresearchonvariousmodels and ALMA observations, including the first detection of methanol in a protoplanetary disk.
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