Lore in beweging
Op deze foto draagt een van de twee ALMA transporters, Lore, een van de 7-meter antennes van ALMA, de Atacama Large Millimeter/submillimeter Array. Lore en haar tweeling, Otto, zijn twee knalgele 28-wielvoertuigen, speciaal gemaakt om ALMA-antennes te verplaatsen op het 5000 meter hoge Chajnantor-hoogvlakte. Door dit te doen, kunnen ze de telescoop-array herschikken om de beste waarnemingen van een bepaald doelwit te krijgen. Ze verplaatsen ook antennes tussen Chajnantor en het lager gelegen Operations Support Facility voor onderhoud.
ALMA heeft een belangrijke array van vijftig 12-meter diameter antennes, en een extra array van twaalf 7-meter antennes en vier 12-meter antennes, die bekend staat als de Atacama Compact Array (ACA). Lore draagt hier een van de kleinere, 7-meter antennes van het ACA. De 12-meter antennes van de belangrijkste array kunnen niet dichter dan 15 meter van elkaar geplaatst worden, omdat ze anders zouden botsen. Deze minimale afstand tussen de antennes beperkt het aantal waarneemmogelijkheden. Dit betekent dat de belangrijkste reeks uitgebreide objecten zoals gigantische wolken van moleculair gas in de Melkweg of nabije sterrenstelsels niet kan waarnemen. De ACA is speciaal ontworpen om ALMA te helpen met de waarnemingen van deze uitgebreide objecten. De kleinere 7-meter antennes kunnen dichter bij elkaar worden geplaatst, waardoor ze de bredere structuren - die de grootste configuratie mist - kunnen meten.
De dramatische ijzige pieken op de voorgrond staan bekend als Penitentes (Spaans voor boetelingen). Dit is een merkwaardig natuurverschijnsel in hooggelegen gebieden, meestal meer dan 4000 meter boven de zeespiegel. Het zijn dunne bladen van gehard sneeuw of ijs, die in de richting van de zon wijzen en enkele centimeters tot meters hoog worden.
ALMA, een internationale astronomische faciliteit, is een samenwerkingsverband van Europa, Noord-Amerika en Oost-Azië, met steun van de republiek Chili. De bouw en het beheer van ALMA worden namens Europa geleid door ESO, namens Noord-Amerika door het National Radio Astronomy Observatory (NRAO), bestuurd door de Associated Universities, Inc. (AUI), en namens Oost-Azië door het National Astronomical Observatory of Japan (NAOJ). De overkoepelende leiding en het toezicht op bouw, ingebruikname en beheer van ALMA is in handen van het Joint ALMA Observatory (JAO).
Links
Vertaling: Teun van Vijfeijken
Credit:ALMA (ESO/NAOJ/NRAO)
Over de afbeelding
| Id: | potw1318a |
| Taal: | nl-be |
| Type: | Fotografisch |
| Publicatiedatum: | 6 mei 2013 10:00 |
| Grootte: | 5212 x 3468 px |
Over het object
| Naam: | ALMA transporters, Atacama Large Millimeter/submillimeter Array |
| Type: | Unspecified : Technology : Observatory : Facility |
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