Astronomy and Astrophysics – Astrophysics
Scientific paper
2008-07-22
Astronomy and Astrophysics
Astrophysics
accepted to ApJ; Table 2 is available in its entirely at http://www.cfa.harvard.edu/~lmatthew/tab2.tex
Scientific paper
10.1086/592086
We recently reported the discovery of a regular corrugation pattern in the HI disk of the isolated, edge-on spiral galaxy IC2233. 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 IC2233, including the young-to-intermediate age stars, the HII 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 HI 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.
Matthews Lynn Diane
Uson Juan M.
No associations
LandOfFree
Corrugations in the Disk of the Edge-On Spiral Galaxy IC2233 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Corrugations in the Disk of the Edge-On Spiral Galaxy IC2233, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Corrugations in the Disk of the Edge-On Spiral Galaxy IC2233 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-247