星間媒介. 星間媒介. 星間媒介. 星間媒介. 星間媒介. 862 nmの拡散星間帯の擬似3次元地図
Janez Kos1, Tomaž Zwitter2, Rosemary Wyse3
1Faculty of Mathematics and Physics, University of Ljubljana, Jadranska 19, 1000 Ljubljana, Slovenia. janez.kos@fmf.uni-lj.si.
Science (New York, N.Y.)
|August 16, 2014
まとめ
拡散星間帯 (DIB) は,神秘的なスペクトル線である. 新しい研究は,DIB 8620の強さをマッピングし,星間介質での分布と,星間塵と比較して明確な垂直スケール高度を明らかにしています.
科学分野:
- 天文学 (astronomy) 天文学 (astronomy) とは,天文学 (astronomy) とは,天文学 (astronomy) とは,天文学 (astronomy) とは
- 天体物理学 天体物理学
- スペクトル顕微鏡検査です.
背景:
- 拡散星間帯 (DIB) は,1922年以来,恒星スペクトルで観測された吸収線です.
- 恒星間介質におけるそれらの起源は,天文スペクトロスコピーの長年の問題である.
研究 の 目的:
- 地元の恒星間媒質における特定のDIB (8620アングストーム) の空間的分布を調査する.
- このDIBの分布を星間塵の分布と比較する.
主な方法:
- RAVE (Radial Velocity Experiment) の調査から約50万の恒星スペクトルを利用した.
- 太陽から3キロパーセク以内のDIB 8620の強さの擬似3次元マップを生成しました.
- 恒星間塵の絶滅の独立した空間分布マップを構築した.
主要な成果:
- DIB 8620の強さの空間的分布は,銀河平面に沿って星間塵の絶滅を密接に追っている.
- DIB 8620のキャリアは,星間塵よりもはるかに大きな垂直スケールの高さを示しています.
- これは,塵と比較して,DIBキャリアの独特の空間特性を示唆しています.
結論:
- この研究は,局所的な星間媒体のDIBの新しい擬似3Dマップを提供します.
- 発見は,DIBと塵は銀河平面で類似の分布を共有しているが,垂直分布は異なることを示している.
- この研究は,DIBsの性質と分布に関する将来の研究のための方向性を設定します.
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