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Cold atomic hydrogen hemisphere (galactic anticentre direction)

Submitted by Kevin Jardine on 20 July, 2012 - 09:02

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This shows the full 3-dimensional velocity map hemisphere for the cold atomic hydrogen (1 °K) in the direction of the galactic anticentre (outer galaxy).

You can also see a version of this image dissected to show the warmer atomic hydrogen gas within the cold shell here.

The data is taken from the LAB HI survey (Leiden/Argentine/Bonn atomic hydrogen survey), the most detailed all-sky survey available on the atomic hydrogen gas in the Milky Way galaxy.