Abstract
Non-planar distortions, or warps, in the outer gas layers of galaxies are more the rule than the exception, although the degree of warping may differ drastically from one galaxy to another1ā3. H I radio synthesis observations reveal that the edge-on Sbc4 galaxy NGC4013 has the largest regular H I warp so far observed. It extends to a large height above the plane of the galaxy, and begins abruptly at just the radius where photometry indicates the end of the luminous disk. Furthermore, at precisely this position, the rotational velocity is seen to drop by 25 km sā1. These observations can only be explained by a situation in which not only the disk-light distribution, but also the disk-mass distribution, suddenly approach zero at the radius of the warp onset. On the basis of a modelling of the H I gas distribution, we conclude that our line of sight to NGC4013 is, by coincidence, one which shows the warp most clearly.
This is a preview of subscription content, access via your institution
Access options
Subscribe to this journal
Receive 51 print issues and online access
$199.00 per year
only $3.90 per issue
Buy this article
- Purchase on Springer Link
- Instant access to full article PDF
Prices may be subject to local taxes which are calculated during checkout
Similar content being viewed by others
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Bottema, R., Shostak, G. & van der Kruit, P. The prodigious warp of NGC4013. Nature 328, 401ā403 (1987). https://doi.org/10.1038/328401a0
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1038/328401a0
Comments
By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.