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Extreme star-forming galaxy reveals all…!?

10 Feb 2020, 14:08 UTC
Extreme star-forming galaxy reveals all…!?
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Title: Hyperluminous Starburst gives up its secretsAuthors: R. J. Ivison, M. J. Page, M. Cirasuolo, C. M. Harrison, V. Mainieri, V. Arumugam and U. DudzeviciuteFirst author institution: European Southern Observatory, Karl-Schwarzschild-Strasse 2, D-85748 Garching, GermanyStatus: published in MNRAS, open access
Surveys of the infrared sky have led to the discovery of thousands of dust obscured, highly star-forming galaxies — often referred to as submillimetre galaxies (SMGs) due to the submillimetre-wave emission that characterises their cool, dusty nature. Unfortunately, this long wavelength emission presents an observational challenge: the resolution of a telescope has a physical limit, directly proportional to the wavelength of light divided by the diameter of the telescope. For longer wavelengths such as submillimetre, a telescope must be much larger than an optical telescope to achieve comparable resolution. As such, submillimetre telescopes are limited by the feasible sizes of single mirrors, and for decades infrared astronomy was stuck with low resolution images. Out of which has grown a science of fuzzy blobs* (see Fig 1).

Figure 1. The fuzzy blobs that make up HATLAS J084933.4+021443. Top: HST image with ALMA contours overlayed in green. Five distinct sources are visible with ALMA. Bottom: The colour image is constructed using infrared ...

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