Studies of Chemical Compositions of Cluster Forming Clumps

2015 Fiscal Year Final Research Report

• Project/Area Number: 25400225
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Astronomy
• Research Institution: The University of Electro-Communications
• Principal Investigator: Sakai Takeshi 電気通信大学, 情報理工学(系)研究科, 助教 (20469604)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: 星形成 / 星団 / 分子雲 / 星間分子

Outline of Final Research Achievements

We have observed a cluster forming clump (MM3) associated with the infrared dark cloud G34.43+00.24 with the Atacama Large Millimeter/submillimeter Array (ALMA). We have found a young outflow (age < ~1000 yr) and a hot core toward the center of this clump. The size of the hot core is found to be much larger than that of the typical low-mass hot corinos, suggesting a high accretion rate or the presence of multiple star system harboring a few hot corinos. We have also found highly deuterated regions toward the center of the clump, although the DNC/HNC ratio of this clump is very low in the observations with the single-dish Nobeyama 45 m telescope. We think that the DNC and HNC emission observed with the single-dish telescope traces lower density envelopes, while that observed with ALMA traces higher density and highly deuterated regions.

Free Research Field

電波天文学