Massive star formation across the cosmic time
Project/Area Number |
25800102
|
Research Category |
Grant-in-Aid for Young Scientists (B)
|
Allocation Type | Multi-year Fund |
Research Field |
Astronomy
|
Research Institution | The University of Tokyo |
Principal Investigator |
Hosokawa Takashi 東京大学, 理学(系)研究科(研究院), 助教 (30413967)
|
Project Period (FY) |
2013-04-01 – 2016-03-31
|
Project Status |
Completed (Fiscal Year 2015)
|
Budget Amount *help |
¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2015: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2014: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2013: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
|
Keywords | 宇宙初代星 / 大質量星 / 銀河形成 / 原始星 / 宇宙初期天体 / 星間物理 / 超巨大ブラックホール / 種族III星 / 金属欠乏星 / 初代星 / 質量降着 / 電離領域 / 原始星の進化 / 降着円盤 |
Outline of Final Research Achievements |
We have investigated the mass distribution of the first stars with no heavy elements forming in the early universe. In our theoretical study, we have numerically followed a long-term evolution through the early large-scale structure formation, formation and gravitational collapse of primordial gas clouds, until the first stars finally appears after the stellar mass greatly rises via the mass accretion onto tiny embryo protostars. We have dealt with a number of (> 1000 finally) primordial gas clouds, which allows us to examine the statistical properties of the first stars such as their mass distribution. We have also followed the evolution in the late accretion stage where the stellar UV feedback halts the mass accretion to determine the final stellar mass for more than 100 cases. According to our results, the first stars should have had a great diversity in their masses, covering from ~ a few x 10 Msun to ~ 1000 Msun.
|
Report
(4 results)
Research Products
(28 results)
-
-
-
-
[Journal Article] Supermassive star formation via episodic accretion: protostellar disc instability and radiative feedback efficiency2016
Author(s)
Sakurai, Y., Vorobyov, E.I., Hosokawa, T., Yoshida, N., Omukai, K., & Yorke, H.W.
-
Journal Title
Monthly Notices of the Royal Astronomical Society
Volume: 459
Pages: 1137-1145
Related Report
Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
-
[Journal Article] Formation of Massive Primordial Stars: Intermittent UV Feedback with Episodic Mass Accretion2016
Author(s)
Hosokawa, T., Hirano, S., Kuiper, R., Yorke, H.W., Omukai, K., & Yoshida, N.
-
Journal Title
The Astrophysical Journal
Volume: 印刷中
Related Report
Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-