Other
Scientific paper
Jun 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993pasj...45l..39s&link_type=abstract
PASJ: Publications of the Astronomical Society of Japan (ISSN 0004-6264), vol. 45, no. 3, p. L39-L42.
Other
11
Elliptical Galaxies, Galactic Clusters, Galactic Structure, Disk Galaxies, Galactic Evolution, Irregular Galaxies
Scientific paper
We have found possible evidence that boxy-type elliptical galaxies favor the environment of clusters of galaxies, while disky-type ellipticals prefer the field environment. This observation suggests that most elliptical galaxies in the clusters of galaxies resulted from a major merger between two gas-rich systems. On the other hand, field elliptical galaxies were probably formed by a dissipative collapse during an earlier era of galaxy formation and have experienced no major merger event. The various fine structures, such as shells and the variety of stellar populations, observed in field elliptical galaxies may be due to recent minor merger events which hardly altered the fundamental dynamical structure of the galaxies.
Shioya Yasuhiro
Taniguchi Yoshiaki
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