Cold Gas in the Andromeda Galaxy

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Distribution of cold gas (CO) in Andromeda. Right: Optical image of M31. In both images: north is up east ist left. Image: et al. (left) Tautenburg Observatory (right)
Distribution of cold gas (CO) in Andromeda. Right: Optical image of M31. In both images: north is up, east ist left. Image: et al. (left), Tautenburg Observatory (right)

A new radio frequency map of the Andromeda galaxy has been made by a German-French research team of the Max Planck Institute for Radio Astronomy (MPIfR) in Bonn and the Institut de Radioastronomie Millimétrique (IRAM) in Grenoble. The map shows the first detailed distribution of cold gas in a neighbouring galaxy, revealing the sites where new stars are born. The motions of this gas were also obtained. With more than 800 hours of telescope time this study is one of the most extensive observational projects in millimetre radio astronomy.


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