File:ALMA view of the 9io9 galaxy (eso2316a).tiff
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DescriptionALMA view of the 9io9 galaxy (eso2316a).tiff |
English: This image shows the orientation of the magnetic field in the distant 9io9 galaxy, seen here when the Universe was only 20% of its current age — the furthest ever detection of a galaxy’s magnetic field. The observations were done with the Atacama Large Millimeter/submillimeter Array (ALMA), in which ESO is a partner. Dust grains within 9io9 are somewhat aligned with the galaxy’s magnetic field, and due to this they emit polarised light, meaning that light waves oscillate along a preferred direction rather than randomly. ALMA detected this polarisation signal, from which astronomers could work out the orientation of the magnetic field, shown here as curved lines overlaid on the ALMA image.The polarised light signal emitted by the magnetically aligned dust in 9io9 was extremely faint, representing just one percent of the total brightness of the galaxy, so astronomers used a clever trick of nature to help them obtain this result. The team was helped by the fact that 9io9, although very distant from us, had been magnified via a process known as gravitational lensing. This occurs when light from a distant galaxy, in this case 9io9, appears brighter and distorted as it is bent by the gravity of a very large object in the foreground. |
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Date | 6 September 2023 (upload date) | ||
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Author | ALMA (ESO/NAOJ/NRAO)/J. Geach et al. | ||
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Licensing[edit]
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. | |
This file is licensed under the Creative Commons Attribution 4.0 International license.
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 07:17, 7 September 2023 | 6,336 × 6,336 (229.74 MB) | OptimusPrimeBot (talk | contribs) | #Spacemedia - Upload of https://www.eso.org/public/archives/images/original/eso2316a.tif via Commons:Spacemedia |
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Width | 6,336 px |
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Height | 6,336 px |
Bits per component |
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Compression scheme | Uncompressed |
Pixel composition | RGB |
Image data location | 27,138 |
Orientation | Normal |
Number of components | 3 |
Number of rows per strip | 6,336 |
Bytes per compressed strip | 240,869,376 |
Horizontal resolution | 72 dpi |
Vertical resolution | 72 dpi |
Data arrangement | chunky format |
Software used | Adobe Photoshop 24.5 (Windows) |
File change date and time | 15:32, 23 June 2023 |
Color space | sRGB |