File:The polarisation of light emitted by a neutron star (video).webm

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Original file ‎(WebM audio/video file, VP8, length 30 s, 3,840 × 2,160 pixels, 2.23 Mbps overall, file size: 7.96 MB)

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This artist’s view shows how the light coming from the surface of a strongly magnetic neutron star (left) becomes linearly polarised as it travels through the vacuum of space close to the star on its way to the observer on Earth (right). The polarisation of the observed light in the extremely strong magnetic field suggests that the empty space around the neutron star is subject to a quantum effect known as vacuum birefringence, a prediction of quantum electrodynamics (QED). This effect was predicted in the 1930s but has not been observed before.

The magnetic and electric field directions of the light rays are shown by the red and blue lines. Model simulations by Roberto Taverna (University of Padua, Italy) and Denis Gonzalez Caniulef (UCL/MSSL, UK) show how these align along a preferred direction as the light passes through the region around the neutron star. As they become aligned the light becomes polarised, and this polarisation can be detected by sensitive instruments on Earth.
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Source The polarisation of light emitted by a neutron star
Author ESO/L. Calçada
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Date/TimeThumbnailDimensionsUserComment
current15:26, 16 May 201830 s, 3,840 × 2,160 (7.96 MB)ComputerHotline (talk | contribs)Imported media from https://cdn2.eso.org/videos/ultra_hd_broadcast/eso1641a.avi

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Format Bitrate Download Status Encode time
VP9 2160P 2.72 Mbps Completed 09:46, 23 October 2018 4 min 37 s
Streaming 2160p (VP9) 2.72 Mbps Completed 10:07, 17 January 2024 1.0 s
VP9 1440P 1.44 Mbps Completed 09:44, 23 October 2018 2 min 56 s
Streaming 1440p (VP9) 1.44 Mbps Completed 22:42, 23 January 2024 2.0 s
VP9 1080P 729 kbps Completed 09:43, 23 October 2018 1 min 33 s
Streaming 1080p (VP9) Not ready Unknown status
VP9 720P 374 kbps Completed 09:42, 23 October 2018 1 min 7 s
Streaming 720p (VP9) Not ready Unknown status
VP9 480P 201 kbps Completed 09:42, 23 October 2018 43 s
Streaming 480p (VP9) Not ready Unknown status
VP9 360P 117 kbps Completed 09:42, 23 October 2018 35 s
Streaming 360p (VP9) Not ready Unknown status
VP9 240P 64 kbps Completed 09:42, 23 October 2018 39 s
Streaming 240p (VP9) 64 kbps Completed 18:06, 18 December 2023 1.0 s
WebM 360P 384 kbps Completed 15:26, 16 May 2018 28 s
Streaming 144p (MJPEG) 832 kbps Completed 01:17, 10 November 2023 4.0 s

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