Vapor Growth of Forsterite in Protoplanetary Disks: Anisotropy and Its Application to Astromineralogy

2015 Fiscal Year Final Research Report

• Project/Area Number: 25287140
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Petrology/Mineralogy/Economic geology
• Research Institution: Hokkaido University
• Principal Investigator: Tachibana Shogo 北海道大学, 理学(系)研究科(研究院), 准教授 (50361564)
• Co-Investigator(Kenkyū-buntansha): Akira Miyake 京都大学, 理学(系)研究科(研究院), 准教授 (10324609) ; Naoya Sakamoto 北海道大学, 創成研究機構, 助教 (30466429) ; Jun Kawano 北海道大学, 創成研究機構, 特任助教 (40378550)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: フォルステライト / 原始太陽系円盤 / 気相成長 / 速度論 / 宇宙鉱物学

Outline of Final Research Achievements

Vapor growth experiments on forsterite, a major silicate mineral in space, were conducted under controlled protoplanetary disk conditions in order to understand its vapor growth kinetics. The growth experiments of forsterite at 1350 K in the presence of hydrogen gas (5 Pa) containing H2O (H2O/H2=0.05) were done at the supersaturation ratio of 15-20, and we found that the condensation coefficient of forsterite, a non-dimension parameter representing kinetic hindrance for vapor growth, is in the range of 0.003-0.006.

Free Research Field

惑星物質科学