Large-Scale Outer Rings of Early-type Disk Galaxies
Astrophysics of Galaxies
2015-09-23 v1
Abstract
We have searched for presence of current star formation in outer stellar rings of early-type disk (S0-Sb) galaxies by inspecting a representative sample of nearby galaxies with rings from the recent Spitzer catalog ARRAKIS (Comeron et al. 2014). We have found that regular rings (of R-type) reveal young stellar population with the age of less than 200~Myr in about half of all the cases, while in the pseudorings (open rings, R'), which inhabit only spiral galaxies, current star formation proceeds almost always.
Keywords
Cite
@article{arxiv.1509.04353,
title = {Large-Scale Outer Rings of Early-type Disk Galaxies},
author = {Irina P. Kostiuk and Olga K. Sil'chenko},
journal= {arXiv preprint arXiv:1509.04353},
year = {2015}
}
Comments
25 pages, 7 figures; slightly edited version of the paper published presently in the Astrophysical Bulletin v. 70, no.3, pp.280-291