近く に ある 若き 星群 の 大半 は 三つ の 巨大 な 複合体 で 形成 さ れ て いる
Cameren Swiggum1, João Alves2, Robert Benjamin3
1Department of Astrophysics, University of Vienna, Vienna, Austria. cameren.swiggum@univie.ac.at.
Nature
|June 10, 2024
まとめ
近くの若い星団は たった3つの巨大な星形成地域から生まれました 過去の位置を追跡すると これらの集団が ローカルバブルと 近くのスーパーシェルを 作り出したことが判明しました
科学分野:
- 天文学と天体物理学
- スター進化
- 星間メディア
背景:
- 地元の恒星間環境と 恒星形成の歴史を理解することは 極めて重要です
- 最近の天文観測ミッションでは 近くの若い星群が 共通の起源を持つことが判明しました
- これらのクラスターを 誕生地点にマッピングすることは 放射速度データによって制限されていました
研究 の 目的:
- 太陽の近くにある若い星団の起源を 特定するためです
- これらのクラスターを 元の領域にマップします
- 地元のバブルと 近くのスーパーシェルの 形成を調査する
主な方法:
- 第3回のガイア発射と 大規模なスペクトロスコピク調査のデータを分析した.
- 太陽から1キロパルセック以内の 272個の若い星団のうち155個を特定しました
- 3千万年前の星団の 過去の位置を再構築した
主要な成果:
- 若いクラスターの57%は3つの異なる空間から発生します.
- この3つのボリュームは コンパクトで巨大な 星形成複合体を表しています
- 一つのファミリーには,タウルスとスコーピウス・セントアウスの星形成地域からの星群が含まれています.
結論:
- 特定されたクラスターファミリーはおそらく200以上の超新星を生み出しました.
- これらの超新星は,ローカルバブルとGSH 238+00+09の源として提案されています.
- これは局所的な星形成とバブル進化の 統一モデルを提供します
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