AGILEでベラパルサー風雲からのガンマ線放射の検出
A Pellizzoni1, A Trois, M Tavani
1INAF-Osservatorio Astronomico di Cagliari, loc. Poggio dei Pini, strada 54, I-09012, Capoterra (CA), Italy. apellizz@ca.astro.it
Science (New York, N.Y.)
|January 2, 2010
まとめ
私たちはAGILE衛星を使用して,GeVガンマ線帯域でベラパルサー風雲を検出しました. この発見は,パルサー風の星雲を理解し,銀河のガンマ線源を特定するのに役立ちます.
科学分野:
- 天体物理学 天体物理学
- 高エネルギー天体物理学
- ガンマ線天文学のガンマ線天文学
背景:
- パルサー風星雲 (PWNe) は,電磁スペクトル全体に放射するパルサーからの相対性粒子によってエネルギーを与えられます.
- 以前の観測ではガンマ線データがなかったため,PWNe現象と放射機構の完全な理解を妨げていた.
- TeVの観測は存在していますが,GeVのガンマ線データは,多波長画像を全面的に理解するために不可欠です.
研究 の 目的:
- GeVガンマ線帯のヴェラパルサー風雲を検出する.
- PWNe.におけるGeV放出の原因となる粒子の集団を制限する.
- PWNeを,銀河のガンマ線源に寄与するガンマ線放射器のクラスとして確立する.
主な方法:
- AGILE衛星のデータを活用した.
- 100 MeVから3 GeVのエネルギー範囲のガンマ線放射を分析した.
- ヴェラパルサー風雲に注目しています.
主要な成果:
- GeVガンマ線帯のヴェラパルサー風雲を成功裏に検出しました.
- 観測されたGeV放出に対して責任を負う粒子集団の性質を制限した.
- PWNeが有意なガンマ線発射物質であることを示した.
結論:
- GeVのガンマ線でベラPWNの検出は,重要な観測証拠を提供します.
- この発見は,PWNe.内の粒子加速と放射プロセスを理解するのに役立ちます.
- パルサー風雲は,未確認の銀河のガンマ線源の一部の潜在的な源クラスとして特定されています.
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