Triggered star formation in giant HI supershells: ionized gas
Abstract
We considered the regions of triggered star formation inside kpc-sized HI supershells in three dwarf galaxies: IC 1613, IC 2574 and Holmberg II. The ionized and neutral gas morphology and kinematics were studied based on our observations with scanning Fabry-Perot interferometer at the SAO RAS 6-m telescope and 21 cm archival data of THINGS and LITTLE THINGS surveys. The qualitative analysis of the observational data performed in order to highlight the two questions: why the star formation occurred very locally in the supershells, and how the ongoing star formation in HI supershells rims influence its evolution? During the investigation we discovered the phenomenon never observed before in galaxies IC 2574 and Holmberg II: we found faint giant (kpc-sized) ionized shells in H-alpha and [SII]6717,6731 lines inside the supergiant HI shells.
Keywords
Cite
@article{arxiv.1512.08820,
title = {Triggered star formation in giant HI supershells: ionized gas},
author = {O. V. Egorov and T. A. Lozinskaya and A. V. Moiseev},
journal= {arXiv preprint arXiv:1512.08820},
year = {2015}
}
Comments
Published in proceedings of the conference "Galaxies" (Essentuki, Russia, November 24-28, 2014). 9 pages, 4 figures