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Summary
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English: This artist’s impression shows the exotic double object that consists of a tiny, but very heavy neutron star that spins 25 times each second, orbited every two and a half hours by a white dwarf star. The neutron star is a pulsar named PSR J0348+0432 that is giving off radio waves that can be picked up on Earth by radio telescopes. Although this unusual pair is very interesting in its own right it is also a unique laboratory for testing the limits of physical theories.
This system is radiating gravitational radiation, ripples in spacetime. Although these waves cannot be yet detected directly by astronomers on Earth they can be detected indirectly by measuring the change in the orbit of the system as it loses energy. As the pulsar is so small the relative sizes of the two objects are not drawn to scale.Deitsch: Diese künstlerische Darstellung zeigt ein exotisches Doppelsternsystem, das aus einem winzigen, aber sehr massereichen Neutronenstern besteht, der sich 25 mal pro Sekunde um sich selber dreht und alle zweieinhalb Stunden von einem Weißen Zwerg umkreist wird. Der Neutronenstern ist ein Pulsar, der Radiowellen abstrahlt, die dann auf der Erde mit Hilfe von Radioteleskopen empfangen werden können. Obwohl dieses ungewöhnliche Paar an sich schon sehr interessant ist, stellt es zusätzlich ein einzigartiges Testobjekt zur Überprüfung der Grenzen physikalischer Theorien dar.
Das Doppelsternsystem strahlt Gavitationswellen ab, sozusagen kleine Rippel in der Raumzeit. Obwohl diese Wellen (in diesem Bild als Gitternetz dargestellt) von Astronomen auf der Erde nicht direkt nachgewiesen werden können, können sie indirekt vermessen werden, indem man die kleinen Veränderungen in der Umlaufbahn des Systems durch den Energieverlust misst. Da der Pulsar sehr klein ist, sind die relativen Größen der beiden Objekte nicht maßstabsgetreu dargestellt. |
| Date | |
| Source | http://www.eso.org/public/images/eso1319c/ |
| Author | ESO/L. Calçada |
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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. |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 08:12, 26 April 2013 | | 5,000 × 3,125 (3.47 MB) | Stas1995 | 5000 × 3125 |
| 08:11, 26 April 2013 |  | 4,000 × 2,500 (3.5 MB) | Stas1995 | User created page with UploadWizard |
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