| 2nd of October 2015 |
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| Hydrogen in the galaxy ESO115-G023 |
| by Bärbel Koribalski (CASS) |
| HI spectral line observations deliver large
data cubes. One way to represent the information on the distribution and
rotation of the neutral hydrogen (HI) emission in galaxies - shown here - is
via moment maps. (Left) 0. moment = HI distribution, (middle) 1. moment =
mean HI velocity field, and (right) 2. moment = mean HI velocity dispersion.
- The edge-on galaxy ESO115-G023 and its newly discovered companion are
part of the Local Volume HI Survey (LVHIS).
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