File:Positions of the telescopes used in the 1.3 mm VLBI observations of the quasar 3C 279.ogv

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English: Astronomers connected the Atacama Pathfinder Experiment (APEX), in Chile, to the Submillimeter Array (SMA) in Hawaii, USA, and the Submillimeter Telescope (SMT) in Arizona, USA for the first time, to make the sharpest observation ever of the centre of a distant galaxy, the bright quasar 3C 279. The telescopes were linked using a technique known as Very Long Baseline Interferometry (VLBI). Larger telescopes can make sharper observations, and interferometry allows multiple telescopes to act like a single telescope as large as the separation — or “baseline” — between them. The baseline length from Chile (APEX) to Hawaii (SMA) is 9447 km, from Chile to Arizona (SMT) 7174 km, and from Arizona to Hawaii 4627 km.
Deutsch: Astronomen haben erstmals das Atacama Pathfinder Experiment (APEX) in Chile mit dem Submillimeter Array (SMA) in Hawaii (USA) und dem Submillimeter Telescope (SMT) in Arizona (USA) verbunden, um anhand des Quasars 3C 279 die schärfsten Beobachtungen des Zentrums einer fernen Galaxie überhaupt zu gewinnen. Die Verbindung der Teleskope kam durch eine Technik zustande, die man Very Long Baseline Interferometry (wörtlich Interferometrie mit sehr langer Basislinie, abgekürzt VLBI) nennt. Je größer der Durchmesser eines Teleskops, desto schärfere Aufnahmen kann es machen. Die Interferometrie ermöglicht es, mehrere Teleskope zu einem Teleskop zusammenzuschalten, dessen Auflösungsvermögen nicht mehr dem der Einzelteleskope sondern dem Abstand der Teleskope – der sogenannten Basislinie – entspricht. Die drei für die Quasarbeobachtungen verwendeten Teleskope ergeben ein Interferometer mit interkontinentalen Basislängen von 9447 km von Chile nach Hawaii, 7174 km von Chile nach Arizona und 4627 km von Arizona nach Hawaii.
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Source http://www.eso.org/public/videos/eso1229b/
Author ESO/L. Calçada

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current11:00, 30 November 201336 s, 1,280 × 720 (12.57 MB)Stas1995 (talk | contribs)User created page with UploadWizard

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