Fichier:ECARmulticolor4.tnl.jpg
ECARmulticolor4.tnl.jpg (300 × 171 pixels, taille du fichier : 6 kio, type MIME : image/jpeg)
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English: Chandra has revealed unexpected structures around the nova at the center of Eta Carina. The colors are artificial to help the viewer sort out details and structure. The new X-ray observation shows three distinct structures: an outer, horseshoe-shaped ring about 2 light years in diameter, a hot inner core about 3 light-months in diameter, and a hot central source less than 1 light-month in diameter which may contain the superstar that drives the whole show. The outer ring provides evidence of another large explosion that occurred over 1,000 years ago. Credit: Chandra Science Center and NASA. |
| Date | |
| Source | Science@NASA Chandra Takes X-ray Image of Repeat Offender Image of Eta Carina reveals shocking details of mysterious star, url=http://science.nasa.gov/newhome/headlines/ast08oct99_1.htm |
| Auteur | Dr. John M. Horack , Director of Science Communications, Editor: Dave Dooling Curator: Linda Porter NASA Official: M. Frank Rose |
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Images produced by NASA are usually free of copyright [...] |
All three structures are thought to represent shock waves produced by matter rushing away from the superstar at supersonic speeds. The temperature of the shock-heated gas ranges from 60 million deg Kelvin in the central regions to 3 million K on the outer structure. "The Chandra image contains some puzzles for existing ideas of how a star can produce such hot and intense X-rays," agreed Prof. Kris Davidson of the University of Minnesota. Davidson is principal investigator for the Eta Carina observations by Hubble. "In the most popular theory, X-rays are made by colliding gas streams from two stars so close together that they'd look like a point source to us. But what happens to gas streams that escape to farther distances? The extended hot stuff in the middle of the new image gives demanding new conditions for any theory to meet."
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| Date et heure | Vignette | Dimensions | Utilisateur | Commentaire | |
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| actuel | 16 novembre 2009 à 23:44 | | 300 × 171 (6 kio) | Marshallsumter | {{Information |Description={{en|1=Chandra has revealed unexpected structures around the nova at the center of Eta Carina. The colors are artificial to help the viewer sort out details and structure. The new X-ray observation shows three distinct structure |
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