| |
 |
| Paper: |
Spatially Resolved Spectroscopic Observations of a Possible E+A
Progenitor SDSS J160241.00+521426.9 |
| Volume: |
477, Galaxy Mergers in an Evolving Universe |
| Page: |
77 |
| Authors: |
Matsubayashi, K. |
| Abstract: |
In order to investigate the evolution of E+A galaxies, we observed a
galaxy SDSS J160241.00+521426.9, a possible E+A progenitor which shows both
emission and strong Balmer absorptions, and its neighbor galaxy.
We used the integral field spectroscopic mode of the Kyoto Tridimensional
Spectrograph (Kyoto3DII), mounted on the University of Hawaii 88-inch telescope
located on Mauna Kea, and the slit-spectroscopic mode of the Faint Object
Camera and Spectrograph (FOCAS) on the Subaru Telescope.
We found a strong Balmer absorption region in the center of the galaxy and an
emission-line region located 2 kpc from the center, in the direction of its
neighbor galaxy.
Comparing observed Lick indices of Balmer lines and color indices with those
predicted from stellar population synthesis models, we find that a suddenly
quenched star-formation scenario is plausible for the star-formation history of
the central region.
We consider that star formation started in the galaxy due to galaxy
interactions and was quenched in the central region, whereas star formation in
a region offset from the center still continues or has begun recently. |
|
|
|
|
|
