Toward understanding the initial conditions of star formation using realistic magnetohydrodynamics simulations
Project/Area Number |
23740154
|
Research Category |
Grant-in-Aid for Young Scientists (B)
|
Allocation Type | Multi-year Fund |
Research Field |
Astronomy
|
Research Institution | National Astronomical Observatory of Japan (2013-2014) Aoyama Gakuin University (2011-2012) |
Principal Investigator |
|
Project Period (FY) |
2011-04-28 – 2015-03-31
|
Project Status |
Completed (Fiscal Year 2014)
|
Budget Amount *help |
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2014: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2013: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2012: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2011: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
|
Keywords | 星形成 / 磁気流体力学 / 衝撃波 / 流体力学 / 初代銀河形成 / 熱的不安定性 / 大質量星 / 自己重力 / 分子雲 / 惑星形成 / 超音速乱流 / 磁気流体シミュレーション |
Outline of Final Research Achievements |
Using three-dimensional, realistic, magneto-hydrodynamics simulations, we studied star formation mechanism in our universe. The important findings obtained in this work are as follows: 1) Molecular clouds that are the site of star formation are found to be formed by accretion of interstellar atomic clouds. In addition, we showed that accretion of clumpy atomic clouds, which are formed as a consequence of thermal instability, is an important driver of supersonic turbulence in molecular clouds, and atomic gas component of turbulent gas dominate the dynamics of molecular clouds and controls star formation. 2) Intensive molecular cloud collision and resulting gas compression/magnetic field amplification is found to be a triggering mechanism of massive star formation in our galaxy. 3) Structure formation due to thermal instability is found to be playing impotent roles in particle acceleration in young supernova remnants and star cluster formation in the first galaxy.
|
Report
(5 results)
Research Products
(52 results)
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
[Presentation] 分子雲の磁気流体ダイナミクス2014
Author(s)
井上剛志
Organizer
名古屋大学南半球研究センター研究会
Place of Presentation
名古屋大学(愛知県)
Year and Date
2014-10-01 – 2014-10-03
Related Report
Invited
-
-
[Presentation] 星間媒質の動的進化過程2014
Author(s)
井上剛志
Organizer
日本天文学会2014年秋期年会
Place of Presentation
山形大学(山形県)
Year and Date
2014-09-11 – 2014-09-13
Related Report
Invited
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-