File:Spring Cleaning in an Infant Star System.jpg
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Summary
DescriptionSpring Cleaning in an Infant Star System.jpg |
English: This image depicts the dusty disc encircling the young, isolated star HD 169142. The Atacama Large Millimeter/submillimeter Array (ALMA) imaged this disc in high resolution by picking up faint signals from its constituent millimetre-sized dust grains. The vivid rings are thick bands of dust, separated by deep gaps.
Optimised to study the cold gas and dust of systems like HD 169142, ALMA’s sharp eyes have revealed the structure of many infant solar systems with similar cavities and gaps. A variety of theories have been proposed to explain them — such as turbulence caused by magnetorotational instability, or the fusing of dust grains — but the most plausible explanation is that these pronounced gaps were carved out by giant protoplanets. When solar systems form gas and dust coalesce into planets. These planets then effectively spring clean their orbits, clearing them of gas and dust and herding the remaining material into well-defined bands. The deep gaps seen in this image are consistent with the presence of multiple protoplanets — a finding that agrees with other optical and infrared studies of the same system. Observing such dusty protoplanetary discs with ALMA allows scientists to investigate the first steps of planet formation in a bid to unveil the evolutionary paths of these infant systems. |
Date | |
Source | https://www.eso.org/public/images/potw1714a/ |
Author | ALMA (ESO/NAOJ/NRAO)/ Fedele et al. |
Licensing
This media was created by the European Southern Observatory (ESO).
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This file is licensed under the Creative Commons Attribution 4.0 International license.
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Items portrayed in this file
depicts
3 April 2017
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Date/Time | Dimensions | User | Comment | |
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current | 00:19, 10 August 2019 | 2,000 × 2,000 (179 KB) | BevinKacon | actual size from ESO original source |
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Metadata
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Image title |
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Date and time of data generation | 06:00, 3 April 2017 |
Software used | The ESA/ESO/NASA FITS Liberator |
File change date and time | 15:36, 10 March 2017 |
Date and time of digitizing | 15:59, 10 March 2017 |
Date metadata was last modified | 16:36, 10 March 2017 |
Credit/Provider | ALMA (ESO/NAOJ/NRAO)/ Fedele et al. |
Source | European Southern Observatory |
Unique ID of original document | xmp.did:f9e9cb28-549a-254b-b7af-db66f75b631c |
Short title |
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Keywords | HD 169142 |
Contact information |
Karl-Schwarzschild-Strasse 2 Garching bei München, , D-85748 Germany |
Usage terms |
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IIM version | 4 |