SIMBAD references

2008ApJ...688..237M - Astrophys. J., 688, 237-244 (2008/November-3)

Corrugations in the disk of the edge-on spiral galaxy IC 2233.


Abstract (from CDS):

We recently reported the discovery of a regular corrugation pattern in the H I disk of the isolated, edge-on spiral galaxy IC 2233. Here we present measurements of the vertical structure of this galaxy at several additional wavelengths, ranging from the far-ultraviolet to the far-infrared. We find that undular patterns with amplitude ≲5" (≲250 pc) are visible in a variety of Population I tracers in IC 2233, including the young to intermediate-age stars, the H II regions, and the dust. However, the vertical excursions become less pronounced in the older stellar populations traced by the mid-infrared light. This suggests that the process leading to the vertical displacements may be linked with the regulation of star formation in the galaxy. We have also identified a relationship between the locations of the density corrugations and small-amplitude (≲5 km/s) velocity undulations in the H I rotation curve. We are able to exclude several possible mechanisms for the origin of the observed corrugations, including tidal interaction from a companion, Parker instabilities, or a galactic bore. Global gravitational instabilities appear to be the most likely explanation, although local perturbations may also be important.

Abstract Copyright:

Journal keyword(s): galaxies: individual (IC 2233) - Galaxies: Spiral - Galaxies: Structure - Instabilities - ISM: Structure

VizieR on-line data: <Available at CDS (J/ApJ/688/237): table2.dat table1.dat>

Simbad objects: 6

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