Exploring an Evolution of Chemical Diversity from Protostellar disks to Protoplanetary disks

探索从原恒星盘到原行星盘的化学多样性的演变

基本信息

批准号：
23740142
负责人：
SAKAI Nami
金额：
$ 2.83万
依托单位：
The University of Tokyo
依托单位国家：
日本
项目类别：
Grant-in-Aid for Young Scientists (B)
财政年份：
2011
资助国家：
日本
起止时间：
2011 至 2012
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-23740142/
关键词：
星形成惑星系形成星間物質星間分子電波天文学

项目摘要

It is now established that low-mass Class 0 protostellar sources show significant chemical diversity. In this study, further evolution of such diversity toward protostellar disks and protoplanetary disks has been explored. Spectral line survey observations have been conducted toward various Class I sources with the Nobeyama 45 m telescope and the IRAM30 m telescope, and TMC-1A has been identified as a Class I analog of the WCCC (warm carbon chain chemistry) source which is characterized by rich existence of carbon-chain molecules. In parallel, the evolution of the WCCC source has been studied by observing its prototype, L1527, with high spatial resolution of 1” or better by using ALMA (Atacama Large Millimeter/submillimeter Array). Carbon-chain molecules are confirmed to exist inan infalling rotating envelope whose inner radius is about 100 AU, although they are deficient within it. This is an important clue to an understanding chemical evolution of the WCCC sources. Furthermore, large scale distribution of CH has been observed toward Heiles Cloud 2 in the Taurus molecular cloud by using the Max Planck Institute 100 m telescope in Germany in order to explore an origin of the WCCC phenomenon. On the basis of the result, I have critically tested a possibility that short timescale of star-formation in a parent cloud is responsible for the WCCC phenomenon.

现在已经确定，低质量的0类ProtoStellar来源显示出明显的化学多样性。在这项研究中，已经探索了对原始磁盘和原行星磁盘的这种多样性的进一步演变。光谱线调查的观察结果已针对Inbeyama 45 M望远镜和IRAM30 M望远镜进行了I类级别，TMC-1A被确定为WCCC（暖碳链化学）源的I类类似物，其特征是碳链分子的丰富存在。 In parallel, the evolution of the WCCC source has been studiod by observing its prototype, L1527, with high spatial resolution of 1” or better by using ALMA (Atacama Large Millimeter/submillimeter Array). Carbon-chain molecules are confirmed to exist inan infalling rotating envelope whose inner radius is about 100 AU, although They are definite within it. This is an important clue to an understanding chemical WCCC来源的演变。

项目成果

期刊论文数量（0）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Chemical Diversity of Low-Mass Star-Forming Cores: Class 0 to Class I

低质量恒星形成核心的化学多样性：0 类到 I 类

DOI：
发表时间：
2012
期刊：
影响因子：
0
作者：
Y. Watanabe;N. Sakai;J.E. Lindberg;J.K. Jorgensen;S. E. Bisschop;and S. Yamamoto;Tatsuya Watanabe;渡辺　達也;坂井南美;Tatsuya Watanabe;坂井南美;渡辺　達也;坂井南美;Tatsuya Watanabe;渡辺　達也;坂井　南美;坂井南美;平田潤;坂井南美;坂井南美;坂井南美;坂井南美
通讯作者：
坂井南美

An Unbiased Spectral Line Survey toward R CrA IRS7B in the 345 GHz Window with ASTE

使用 ASTE 在 345 GHz 窗口中对 R CrA IRS7B 进行无偏谱线测量

DOI：
10.1088/0004-637x/745/2/126
发表时间：
2012
期刊：
Astrophys. J
影响因子：
0
作者：
Y. Watanabe;N. Sakai;J.E. Lindberg;J.K. Jorgensen;S. E. Bisschop;and S. Yamamoto
通讯作者：
and S. Yamamoto

化学の目でみた星形成：星形成の多様性

从化学角度看恒星形成：恒星形成的多样性

DOI：
发表时间：
2011
期刊：
日本惑星学会誌
影响因子：
0
作者：
Y. Watanabe;N. Sakai;J.E. Lindberg;J.K. Jorgensen;S. E. Bisschop;and S. Yamamoto;Tatsuya Watanabe;渡辺　達也;坂井南美;Tatsuya Watanabe;坂井南美;渡辺　達也;坂井南美;Tatsuya Watanabe;渡辺　達也;坂井　南美
通讯作者：
坂井　南美

TENTATIVE DETECTION OF DEUTERATED METHANE TOWARD THE LOW-MASS PROTOSTAR IRAS 04368+2557 IN L1527