(Proposal ID) S11B-045

(PI) Matsubayashi, Kazuya

(Proposal Title)
Detailed Structures of Galactic Winds in Nearby Edge-on Starburst Galaxies

(Abstract)
Galactic scale outflows from galactic disks (galactic winds) are common 
phenomena in the universe, and have large impacts on galaxies and their 
environments. In order to investigate the properties of galactic winds, we 
observe six nearby edge-on starburst galaxies with galactic winds. Fabry-Perot 
observation enables us to obtain pure emission line images as well as their 
ratio maps. These include not only strong lines but also weak and essential 
lines: we observe the H alpha, [NII] lambda lambda6548,6583, [SII] lambda lambda 6716,6731, [OI] lambda6300, H beta, and [OIII] lambda5007 emission lines in 
each galaxy. By using [NII]/H alpha, [SII]/H alpha, [OI]/H alpha, and [OIII]/H 
beta ratio maps, we can clearly separate the galactic winds from star-forming 
regions. In addition, we will observe the [OI] lambda6300 line, which greatly 
help us to distinguish the ionization/excitation sources. Through the [NII]/
[SII] ratio maps, we will discover and exactly place regions with nitrogen 
enrichments. The nitrogen is considered to be produced in starbursts and might 
be spread out by galactic winds. This and the past observations will provide a 
complete set of high-resolution line ratio maps of galactic winds in nearby 
starburst galaxies which are observable with Subaru Telescope.