File:Artist's impression of the pulsar PSR J0348+0432 and its white dwarf companion.ogv

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Original file ‎(Ogg multiplexed audio/video file, Theora/Opus, length 36 s, 1,280 × 720 pixels, 5.57 Mbps overall, file size: 24.08 MB)

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English: This video is an artist’s impression of an 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, and the timescales are not realistic
Deitsch: Dieses Video 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 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. Auch die Zeitskalen der Bahnänderungen sind nicht realistisch.
Date
Source http://www.eso.org/public/videos/eso1319a/
Author ESO/L. Calçada

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This media was created by the European Southern Observatory (ESO).
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Date/TimeThumbnailDimensionsUserComment
current20:07, 29 November 201336 s, 1,280 × 720 (24.08 MB)Stas1995 (talk | contribs)User created page with UploadWizard

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Format Bitrate Download Status Encode time
VP9 720P 1.03 Mbps Completed 04:49, 18 August 2018 48 s
Streaming 720p (VP9) 1.02 Mbps Completed 07:17, 2 February 2024 1.0 s
VP9 480P 487 kbps Completed 04:48, 18 August 2018 38 s
Streaming 480p (VP9) 483 kbps Completed 17:34, 18 December 2023 1.0 s
VP9 360P 278 kbps Completed 04:48, 18 August 2018 28 s
Streaming 360p (VP9) 274 kbps Completed 12:31, 12 January 2024 1.0 s
VP9 240P 153 kbps Completed 04:48, 18 August 2018 26 s
Streaming 240p (VP9) 149 kbps Completed 15:37, 12 December 2023 1.0 s
WebM 360P 494 kbps Completed 20:08, 29 November 2013 57 s
Streaming 144p (MJPEG) 462 kbps Completed 15:53, 30 October 2023 2.0 s
Stereo (Opus) 2 kbps Completed 11:54, 15 November 2023 1.0 s
Stereo (MP3) 128 kbps Completed 19:59, 29 October 2023 2.0 s

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