Mathematics – Logic
Scientific paper
Jul 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998egdg.conf...53l&link_type=abstract
"Dynamics of Galaxies and Galactic Nuclei, An International Workshop of the SFB 328 "Evolution of Galaxies" held at the ITA Nove
Mathematics
Logic
Scientific paper
Our new statistics of bulges of disk galaxies reveals a high frequency of box- or peanut shaped (b/p) bulges of up to 50%. Therefore very common processes are required to explain this high fraction. In a sample of edge-on disk galaxies selected from the RC3 we characterize bulges by their degree of b/p-shape using the ``Digitized Sky Survey''. The distributions of galaxies with b/p-bulge and barred galaxies binned by morphological type show the same general dependences. In an analysis of a possible relation between this internal structure and the presence of satellite systems of isolated disk galaxies we find a possible connection between b/p bulges and galaxies with the presence of satellites. From this we conclude that b/p-bulges preferentially occur in disk galaxies with companions. Therefore the most likely reason responsible for the development of b/p-bulges is a bar originating from galaxy interaction in stable disks or by an infalling satellite.
Dettmar Ralf-Juergen
Lütticke Rainer
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