Are dust particles in comets and debris disks altered prestellar interstellar dust or protoplanetary disk condensates?

2017 Fiscal Year Final Research Report

• Project/Area Number: 26400230
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Astronomy
• Research Institution: Kobe University (2014-2015, 2017); Nagoya University (2016)
• Principal Investigator: Kimura Hiroshi 神戸大学, 理学研究科, 理学研究科研究員 (10400011)
• Project Period (FY): 2014-04-01 – 2018-03-31
• Keywords: 星間ダスト / 局所星間雲 / 元素存在量 / 有機物 / シリケイト

Outline of Final Research Achievements

In this research, by analyzing space mission data from Cassini, Stardust, and Rosetta for interstellar dust and cometary dust as well as astronomical observation data of interstellar gas by Hubble Space Telescope and of debris disks by ground-based near-infrared interferometers, we have shown the differences in the chemical composition and its homogeneity/inhomogeneity between interstellar dust and dust in comets and debris disks. We conclude from our results that primitive dust particles in comets and debris disks do not originate from prestellar interstellar dust, but from protoplanetary disk condensates.

Free Research Field

天文学