The most detailed radio map of the Milky Way

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The most detailed radio map of the Milky Way

Post by Dragon on Fri Jan 26, 2018 3:24 pm

Astronomers have conducted a large-scale survey of the invisible Milky Way using the Nobeyama 45-m Radio Telescope.

When you look up on a clear, dark night, you can see the Milky Way with the naked eye. If you shoot a photograph of the Milky Way, you will find some dark patches with fewer stars. In these areas, clouds of gas and dust in the Milky Way block the light from background stars. By observing the radio waves emitted by the gas in these clouds, astronomers can study the invisible portions of the Milky Way.

A multi-institutional research group used the 45-m telescope from 2014 to 2017 to create the most extensive and detailed radio maps of the Milky Way in human history. The team has completed maps covering an area as wide as 520 full moons with about three times the spatial resolution of previous maps. This map will enable astronomers to study the structure of the interstellar medium from the large-scale structure of the entire Milky Way to the small-scale structure of individual molecular cloud cores directly related to star formation. Thanks to the good spatial resolution of the 45-m telescope, the team discovered many filamentary structures which were not seen clearly in previous maps. These structures are thought to hold important clues to understanding how stars are formed.

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Re: The most detailed radio map of the Milky Way

Post by Dragon on Fri Jan 26, 2018 3:25 pm



Radio map of the Milky Way obtained by FUGIN project. Top: Three color (false color) radio map of the Milky Way (l=10-50 deg) obtained by the FUGIN Project. Red, green, and blue represent the radio intensities of 12CO, 13CO, and C18O, respectively. Second Line: Infrared image of the same region obtained by the Spitzer Space Telescope. Red, green, and blue represent the intensities of 24μm, 8μm, and 5.8μm radio waves respectively. Top Zoom-In: Three color radio map of the Milky Way (l=12-22 deg) obtained by the FUGIN Project. The colors are the same as the top image. Lower-Left Zoom-In: Enlarged view of the W51 region. The colors are the same as the top image.Lower-Right Zoom-In: Enlarged view of the M17 region. The colors are the same as the top image.

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Re: The most detailed radio map of the Milky Way

Post by Dragon on Fri Jan 26, 2018 3:27 pm


Credit: National Astronomical Observatory of Japan

Observation region of FUGIN project: Starscape photograph taken at Nobeyama Radio Observatory by Norikazu Okabe. The FUGIN observation region (l=10-50 deg) is marked.

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Re: The most detailed radio map of the Milky Way

Post by Dragon on Fri Jan 26, 2018 3:28 pm



The European Space Agency (ESA) has released the most detailed map of the Milky Way to date after cataloging the precise positions and brightness of more than 1.1 billion stars.

 
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