[KSCI] Korea Science Citation Index Service

http://dx.doi.org/10.5303/JKAS.2003.36.4.261

CCD SURFACE PHOTOMETRY OF SPIRAL GALAXIES: BULGE MORPHOLOGY

Ann, Hong-Bae (Department of Earth Sciences, Pusan National University)

Publication Information

Journal of The Korean Astronomical Society / v.36, no.4, 2003 , pp. 261-270 More about this Journal

Abstract

We have conducted a V-band CCD surface photometry of 68 disk galaxies to analyze the bulge morphology of nearby spirals. We classify bulges into four types according to their ellipticities and the misalignments between the major axis of the bulge and those of the disk and the bar: spherical, oblate, pseudo triaxial, and triaxial. We found that one third of the bulges are triaxial and they are preponderant in barred galaxies. The presence of the triaxial bulges in a significant fraction of unbarred galaxies as well as in barred galaxies might support the secular evolution hypothesis which postulates that the bar driven mass inflow leads to the formation of triaxial bulges and the destruction of bars when sufficient mass is accumulated in the central regions.

Keywords

galaxies: spiral; galaxies: structure; galaxies: bulge; galaxies: surface photometry;

Citations & Related Records

Times Cited By KSCI : 3 (Citation Analysis)

Reference
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