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プロキシマ・センタウリ周りの温帯軌道にある地上の惑星候補
Guillem Anglada-Escudé1, Pedro J Amado2, John Barnes3
1School of Physics and Astronomy, Queen Mary University of London, 327 Mile End Road, London E1 4NS, UK.
Nature
|August 26, 2016
まとめ
惑星系外惑星を発見しました 私たちの最も近い隣の星である プラクシマ・センタウリです この潜在的に居住可能な惑星,プロキシマ bは,少なくとも地球の1.3倍の質量を持ち,恒星の居住可能なゾーン内を回っています.
科学分野:
- 天文学と天体物理学
- 外惑星科学
- 恒星物理学
背景:
- 太陽に最も近い赤色矮星であるプロキシマ・センタウリは 広く研究されています
- プロキシマ・センタウリのような 低質量恒星は一般的で 外惑星探査の重要なターゲットです
- 近隣の恒星の周りの惑星系を理解することは,比較惑星学にとって極めて重要です.
研究 の 目的:
- プロキシマ・センタウリの周りを回っている系外惑星を検出し特徴づけます
- 新しく発見された惑星の軌道パラメータと最小質量を 決定する
- 惑星の平衡温度に基づいて 居住の可能性を評価する
主な方法:
- 観測データを活用して 惑星の存在を検出しました
- 軌道周期と半主要な軸を推論するために,放射速度や通過データを分析した.
- 外惑星の軌道特性を元に 最小質量を計算した.
主要な成果:
- 小惑星の発見,プロキシマ・b,プロキシマ・センタウリの周りを回っている.
- この系外惑星の最小質量は,地球質量約1. 3です.
- プロキシマ bは,液体の水に適した均衡温度で,0.05天文単位の距離で11.2日ごとにその星を回っています.
結論:
- 地球に最も近い系外惑星です
- この惑星が 居住可能領域にあることが 表面液体の水が存在する可能性を示唆しています
- この発見は 近くの低質量恒星の周りに 潜在的に居住可能な惑星を発見する可能性を 強調しています
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