Fichier:NASA's Great Observatories Provide a Detailed View of Kepler's Supernova Remnant.jpg
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DescriptionNASA's Great Observatories Provide a Detailed View of Kepler's Supernova Remnant.jpg |
English: NASA's three Great Observatories -- the Hubble Space Telescope, the Spitzer Space Telescope, and the Chandra X-ray Observatory -- joined forces to probe the expanding remains of a supernova, called Kepler's supernova remnant, first seen 400 years ago by sky watchers, including famous astronomer Johannes Kepler.
The combined image unveils a bubble-shaped shroud of gas and dust that is 14 light-years wide and is expanding at 4 million miles per hour (2,000 kilometers per second). Observations from each telescope highlight distinct features of the supernova remnant, a fast-moving shell of iron-rich material from the exploded star, surrounded by an expanding shock wave that is sweeping up interstellar gas and dust. Each color in this image represents a different region of the electromagnetic spectrum, from X-rays to infrared light. These diverse colors are shown in the panel of photographs below the composite image. The X-ray and infrared data cannot be seen with the human eye. By color-coding those data and combining them with Hubble's visible-light view, astronomers are presenting a more complete picture of the supernova remnant. Visible-light images from the Hubble telescope's Advanced Camera for Surveys [colored yellow] reveal where the supernova shock wave is slamming into the densest regions of surrounding gas. The bright glowing knots are dense clumps from instabilities that form behind the shock wave. The Hubble data also show thin filaments of gas that look like rippled sheets seen edge-on. These filaments reveal where the shock wave is encountering lower-density, more uniform interstellar material. The Spitzer telescope shows microscopic dust particles [colored red] that have been heated by the supernova shock wave. The dust re-radiates the shock wave's energy as infrared light. The Spitzer data are brightest in the regions surrounding those seen in detail by the Hubble telescope. The Chandra X-ray data show regions of very hot gas, and extremely high-energy particles. The hottest gas (higher-energy X-rays, colored blue) is located primarily in the regions directly behind the shock front. These regions also show up in the Hubble observations, and also align with the faint rim of glowing material seen in the Spitzer data. The X-rays from the region on the lower left (colored blue) may be dominated by extremely high-energy electrons that were produced by the shock wave and are radiating at radio through X-ray wavelengths as they spiral in the intensified magnetic field behind the shock front. Cooler X-ray gas (lower-energy X-rays, colored green) resides in a thick interior shell and marks the location of heated material expelled from the exploded star. Kepler's supernova, the last such object seen to explode in our Milky Way galaxy, resides about 13,000 light-years away in the constellation Ophiuchus. The Chandra observations were taken in June 2000, the Hubble in August 2003; and the Spitzer in August 2004. |
Date | |
Source | http://www.spitzer.caltech.edu/images/1276-ssc2004-15a%20-NASA-s-Great-Observatories-Provide-a-Detailed-View-of-Kepler-s-Supernova-Remnant |
Auteur | NASA/ESA/R. Sankrit and W. Blair (Johns Hopkins University) |
Image use policy: http://www.spitzer.caltech.edu/info/18-Image-Use-Policy
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Ce fichier provient de la NASA. Sauf exception, les documents créés par la NASA ne sont pas soumis à copyright. Pour plus d'informations, voir la politique de copyright de la NASA. | ||
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actuel | 21 juin 2011 à 20:31 | 2 400 × 3 000 (1,85 Mio) | Spitzersteph |
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Largeur | 2 400 px |
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Hauteur | 3 000 px |
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Schéma de compression | LZW |
Composition des pixels | RVB |
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Orientation | Normale |
Nombre de composantes | 3 |
Résolution horizontale | 300 pt/po |
Résolution verticale | 300 pt/po |
Arrangement des données | Format tronçonné |
Logiciel utilisé | Adobe Photoshop CS3 Macintosh |
Date de modification du fichier | 5 juin 2009 à 14:41 |
Auteur | Spitzer Space Telescope |
Détenteur des droits d’auteur | http://www.spitzer.caltech.edu/Media/mediaimages/copyright.shtml |
Espace colorimétrique | sRGB |
Coordonnées de contact |
http://www.spitzer.caltech.edu 1200 E. California Blvd. 91125 Pasadena, CA USA |
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Titre court |
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Crédit ou fournisseur | NASA/ESA/R. Sankrit and W. Blair (Johns Hopkins University) |
Courte description | NASA's three Great Observatories -- the Hubble Space Telescope, the Spitzer Space Telescope, and the Chandra X-ray Observatory -- joined forces to probe the expanding remains of a supernova, called Kepler's supernova remnant, first seen 400 years ago by sky watchers, including famous astronomer Johannes Kepler. |
Source | Spitzer Space Telescope |
Conditions d’utilisation |
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Version d’IIM | 2 |
Date et heure de génération des données | 6 octobre 2004 |