Young Stellar Populations in the Collisional Ring Galaxy NGC 922
Abstract
We studied the star cluster population properties in the nearby collisional ring galaxy NGC 922 using HST/WFPC2 photometry and population synthesis modeling. We found that 69% of the detected clusters are younger than 7 Myr, and that most of them are located in the ring or along the bar, consistent with the strong Halpha emission. The images also show a tidal plume pointing toward the companion. Its stellar age is consistent with pre-existing stars that were probably stripped off during the passage of the companion. We compared the star-forming complexes observed in NGC 922 with those of a distant ring galaxy from the GOODS field. It indicates very similar masses and sizes, suggesting similar origins. Finally, we found clusters that are excellent progenitor candidates for faint fuzzy clusters.
Keywords
Cite
@article{arxiv.0910.0028,
title = {Young Stellar Populations in the Collisional Ring Galaxy NGC 922},
author = {Anne Pellerin and Gerhardt R. Meurer and Kenji Bekki and Debra M. Elmegreen and O. Ivy. Wong and Patricia Knezek},
journal= {arXiv preprint arXiv:0910.0028},
year = {2015}
}
Comments
To be published in the IAU Symposium 262 proceeding. 2 pages