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Content Provider | AstroPix |
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Description | This Picture of the Week illustrates the remarkable capabilities of SPHERE (the Spectro-Polarimetric High-contrast Exoplanet REsearch instrument), a planet-hunting instrument mounted on ESOs Very Large Telescope (VLT) in Chile: It shows a series of broken rings of dust around a nearby star. These concentric rings are located in the inner region of the debris disc surrounding a young star named HD 141569A, which sits some 370 light-years away from us. In this image we see what is known as a transition disc, a short-lived stage between the protoplanetary phase, when planets have not yet formed, and a later time when planets have coalesced, leaving the disc populated only by any remaining and predominantly dusty debris. What we see here are structures formed of dust, revealed for the first time in near-infrared light by SPHERE at a high enough resolution to capture remarkable detail! The area shown in this image has a diameter of just 200 times the EarthSun distance. Several features are visible, including a bright, prominent ring with well-defined edges so asymmetric that it appears as a half-ring multiple clumps, several concentric ringlets, and a pattern akin to a spiral arm. It is significant that these structures are asymmetric; this may reflect an uneven, or clumpy, distribution of dust in the disc, something for which astronomers do not currently have a firm explanation. It is possible that this phenomenon is caused by the presence of planets, but so far no planets of sufficient size to do this have been found in this system. Links: Research paper C. Perrot et al., Discovery of concentric broken rings at sub-arcsec separations in the HD 141569A gas-rich, debris disk with VLT/SPHERE. |
File Format | TIF / TIFF |
Language | English |
Publisher | European Southern Observatory |
Publisher Date | 2016-06-17 |
Access Restriction | Open |
Rights License | Creative Commons Attribution 4.0 International License |
Subject Keyword | Star Circumstellar Material Disk Debris |
Content Type | Image |
Educational Role | Student Teacher |
Educational Use | Self Learning Classroom |
Education Level | Any Level/Generic |
Resource Type | Photograph |
Subject | Physics Solar System |
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