A neutral hydrogen mapping survey of large galaxies. I - Observations

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Astronomical Maps, Galaxies, H Lines, Hydrogen Clouds, Interstellar Gas, Neutral Gases, Centimeter Waves, Surveys, Telescopes

Scientific paper

The HI line radiation in and around 61 relatively nearby galaxies has been mapped with the 300-ft telescope. Fifty-five of these systems belong to a sample of 78 spiral and irregular galaxies north of declination -19 deg that have Holmberg diameters larger than 9 arcmin. The results are presented in the form of global profiles, contour maps of the integrated HI distribution, and a table giving flux integral, systemic velocity, profile width, and position angle of the receding half of the dynamical major axis.

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