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The vertical extent and kinematics of the HI in NGC 2403

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arxiv astro-ph/0003165 v1 pith:ALVZYCA3 submitted 2000-03-13 astro-ph

classification astro-ph
keywords disklayerrotatingslowlyspiralvelocityabnormallyabove
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The neutral hydrogen line profiles along the major axis of the nearby spiral galaxy NGC 2403 show a wing towards the sytemic velocity. This asymmetry can be explained with the presence of an abnormally thick HI disk (FWHM ~ 5 kpc) or with a two-component structure: a thin disk and a slowly rotating, thicker (1-3 kpc) HI layer. The latter model gives a better representation of the observations. These results throw a new light on the disk-halo connection. In particular, the decrease of rotational velocity with height above the plane may be the result of a galactic fountain flow. A vertically extended, slowly rotating HI layer may be common among spiral galaxies with high levels of star formation.

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Cited by 1 Pith paper

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. MeerKAT Discovery of an Infalling Cold Gas Tail onto the Nearby Barred Spiral Galaxy, NGC 5643

    astro-ph.GA 2025-05 conditional novelty 7.0 of 10

    New MeerKAT H I imaging shows a counter-rotating 30 kpc cold gas tail accreting onto NGC 5643, plus six new H I companions and nuclear H I absorption.

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