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| Paper: |
Hα Surface Brightness Profiles of Star-Forming Galaxies and Dependence on Halo Mass Using the HAGGIS Survey |
| Volume: |
480, Structure and Dynamics of Disk Galaxies |
| Page: |
255 |
| Authors: |
Kulkarni, S.; Wilman, D.; Erwin, P.; Koppenhöfer, J.; Gutierrez, L.; Beckman, J.; Saglia, R.; Bender, R. |
| Abstract: |
We present the first results from the Hα Galaxy Groups Imaging Survey (HAGGIS), a narrow-band imaging survey of SDSS groups at z < 0.05
conducted using the Wide Field Imager (WFI) on the ESO/MPG 2.2-meter telescope and the Wide Field Camera (WFC) on the Issac Newton Telescope (INT). In total,
we observed 100
galaxy groups with a wide range of halo mass (1012 – 1014 M☉) in pairs of narrow-band filters selected to get continuum subtracted
rest-frame
Hα images for each galaxy. The excellent data allows us to detect Hα down to the 10–18 ergs/s/cm2/arcsec2 level.
Here, we examine the role played by halo mass and galaxy
stellar mass in deciding the overall star formation activity in star forming disks by comparing stacked Hα profiles of galaxies in different
halo mass and stellar mass bins. With this preliminary study, we have found that the star-formation activity in star-forming galaxies decreases in
larger halos compared to the field galaxies. Using median equivalent width profiles, we can infer how environmental processes affect
star-forming galaxies differently at different radii. |
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