ファイル:Boulevard of Broken Rings.jpg
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解説Boulevard of Broken Rings.jpg |
English: This Picture of the Week illustrates the remarkable capabilities of SPHERE (the Spectro-Polarimetric High-contrast Exoplanet REsearch instrument), a planet-hunting instrument mounted on ESO’s Very Large Telescope (VLT) in Chile: It shows a series of broken rings of dust around a nearby star. These concentric rings are located in the inner region of the debris disc surrounding a young star named HD 141569A, which sits some 370 light-years away from us.
In this image we see what is known as a transition disc, a short-lived stage between the protoplanetary phase, when planets have not yet formed, and a later time when planets have coalesced, leaving the disc populated only by any remaining — and predominantly dusty — debris. What we see here are structures formed of dust, revealed for the first time in near-infrared light by SPHERE — at a high enough resolution to capture remarkable detail! The area shown in this image has a diameter of just 200 times the Earth–Sun distance. Several features are visible, including a bright, prominent ring with well-defined edges — so asymmetric that it appears as a half-ring — multiple clumps, several concentric ringlets, and a pattern akin to a spiral arm. It is significant that these structures are asymmetric; this may reflect an uneven, or clumpy, distribution of dust in the disc, something for which astronomers do not currently have a firm explanation. It is possible that this phenomenon is caused by the presence of planets, but so far no planets of sufficient size to do this have been found in this system. |
日付 | |
原典 | http://www.eso.org/public/images/potw1625a/ |
作者 | ESO/Perrot |
ライセンス
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This media was created by the European Southern Observatory (ESO).
Their website states: "Unless specifically noted, the images, videos, and music distributed on the public ESO website, along with the texts of press releases, announcements, pictures of the week, blog posts and captions, are licensed under a Creative Commons Attribution 4.0 International License, and may on a non-exclusive basis be reproduced without fee provided the credit is clear and visible." To the uploader: You must provide a link (URL) to the original file and the authorship information if available. |
![]() ![]() このファイルはクリエイティブ・コモンズ 表示 4.0 国際ライセンスのもとに利用を許諾されています。
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題材
20 6 2016
image/jpeg
6b4f7fed1fdada92854379703a3db828b44af4ea
147,082 バイト
703 ピクセル
1,280 ピクセル
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日付と時刻 | サムネイル | 寸法 | 利用者 | コメント | |
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現在の版 | 2024年2月14日 (水) 11:44 | ![]() | 2,659 × 1,461(791キロバイト) | C messier | full size |
2016年6月21日 (火) 11:02 | ![]() | 1,280 × 703(144キロバイト) | Jmencisom | User created page with UploadWizard |
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帰属/提供者 | ESO/Perrot |
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ソース | European Southern Observatory |
短いタイトル |
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画像の説明 |
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使用条件 |
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原画像データの生成日時 | 2016年6月20日 (月) 06:00 |
JPEGファイルのコメント | This Picture of the Week illustrates the remarkable capabilities of SPHERE (the Spectro-Polarimetric High-contrast Exoplanet REsearch instrument), a planet-hunting instrument mounted on ESO’s Very Large Telescope (VLT) in Chile: It shows a series of broken rings of dust around a nearby star. These concentric rings are located in the inner region of the debris disc surrounding a young star named HD 141569A, which sits some 370 light-years away from us. In this image we see what is known as a transition disc, a short-lived stage between the protoplanetary phase, when planets have not yet formed, and a later time when planets have coalesced, leaving the disc populated only by any remaining — and predominantly dusty — debris. What we see here are structures formed of dust, revealed for the first time in near-infrared light by SPHERE — at a high enough resolution to capture remarkable detail! The area shown in this image has a diameter of just 200 times the Earth–Sun distance. Several features are visible, including a bright, prominent ring with well-defined edges — so asymmetric that it appears as a half-ring — multiple clumps, several concentric ringlets, and a pattern akin to a spiral arm. It is significant that these structures are asymmetric; this may reflect an uneven, or clumpy, distribution of dust in the disc, something for which astronomers do not currently have a firm explanation. It is possible that this phenomenon is caused by the presence of planets, but so far no planets of sufficient size to do this have been found in this system. Links: Research paper — C. Perrot et al., Discovery of concentric broken rings at sub-arcsec separations in the HD 141569A gas-rich, debris disk with VLT/SPHERE. |
キーワード | HD 141569 |
連絡先情報 |
Karl-Schwarzschild-Strasse 2 Garching bei München, , D-85748 Germany |
IIMバージョン | 4 |