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ヒラノ シンゴ
Hirano Shingo 平野 信吾 所属 神奈川大学 工学部 応用物理学科 職種 助教 |
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| 言語種別 | 英語 |
| 発行・発表の年月 | 2022/08 |
| 形態種別 | 学術雑誌 |
| 査読 | 査読あり |
| 標題 | Exponentially Amplified Magnetic Field Eliminates Disk Fragmentation around Population III Protostars |
| 執筆形態 | 共著 |
| 掲載誌名 | The Astrophysical Journal Letters |
| 出版社・発行元 | American Astronomical Society |
| 巻・号・頁 | 935(1),pp.L16-L16 |
| 担当区分 | 筆頭著者,責任著者 |
| 著者・共著者 | ◎Shingo Hirano,Masahiro N. Machida |
| 概要 | Abstract
One critical remaining issue that is unclear in the initial mass function of the first (Population III) stars is the final fate of secondary protostars that formed in the accretion disk-specifically, whether they merge or survive. We focus on the magnetic effects on the formation of the first star under a cosmological magnetic field. We perform a suite of ideal magnetohydrodynamic simulations for 1000 yr after the first protostar formation. Instead of the sink particle technique, we employ a stiff equation of state approach to represent the magnetic field structure connecting protostars. Ten years after the first protostar formation in the cloud initialized with B0 = 10−20 G at n0 = 104 cm−3, the magnetic field strength around the protostars has amplified from pico- to kilo-Gauss, which is the same strength as the present-day star. |
| DOI | 10.3847/2041-8213/ac85e0 |
| ISSN | 2041-8205/2041-8213 |
| PermalinkURL | https://iopscience.iop.org/article/10.3847/2041-8213/ac85e0 |
| researchmap用URL | https://iopscience.iop.org/article/10.3847/2041-8213/ac85e0/pdf |
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