Physics
Scientific paper
Aug 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005noao.prop..187y&link_type=abstract
NOAO Proposal ID #2005B-0187
Physics
Scientific paper
The subject of this proposal is to identify physically associated companions of E+A galaxies, and to obtain basic spectroscopic features of bright companions in order to understand the evolution of E+A system. E+A galaxies have been understood as post-starburst galaxies based on their strong Balmer absorption lines and the absence of [OII] or H(alpha) emission lines. Their origin has remained unknown for more than 20 years since E+A galaxies are very rare. To rectify the situation, Goto (2003,2005) has selected large & uniform E+A sample using the Sloan Digital Sky Survey (SDSS) data. Goto (2003) found that there is an excess in number of accompanying galaxies of E+As in the SDSS imaging data, and suggest that the origin of E+As is dynamical merger/interaction with companion galaxies. The merger/interaction origin scenario also implies that E+As can be progenitors of early-type galaxies and play important roles in galaxy evolution. The discussion of Goto (2003) was based on the imaging data. The accompanying galaxies are not spectroscopically observed in SDSS, and it is unknown which galaxy is the real companion of E+A. We therefore propose spectroscopic observation to identify physically associated companions, and to construct companion catalog without any contamination of fore/background overlapping galaxies. The correlation between properties of E+A and those of companions would give us great hints for understanding the evolution of E+A system, and set constraints on the theoretical models of E+A formation.
Goto Tomotsugu
Yagi Masafumi
Yamauchi Chisato
No associations
LandOfFree
Phyiscal associated companion of E+A Galaxies does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Phyiscal associated companion of E+A Galaxies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Phyiscal associated companion of E+A Galaxies will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-796837