2000/06/26 by R. Luetticke, R. Lütticke, R.‐J. Dettmar +2 · 2 citations
Physics and Astronomy · #Astronomy and Astrophysical Research #Astrophysics #Bulge #Extinction (optical mineralogy) #Galaxies: Formation, Evolution, Phenomena #Galaxy #Optics #Physics #Sky #astro-ph
paper · pdf · doi:10.1051/aas:2000354
published as A&AS 145, 405 (2000) · LaTeX, 35 pages, 10 figures, accepted to be published in A&AS
arxiv created 2000/06/26 · openalex publication_date 2000/09/01 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We present a classification for bulges of a complete sample of ~ 1350 edge-on disk galaxies derived from the RC3 (Third Reference Catalogue of Bright Galaxies, de Vaucouleurs et al. 1991). A visual classification of the bulges using the Digitized Sky Survey (DSS) in three types of b/p bulges or as an elliptical type is presented and supported by CCD images. NIR observations reveal that dust extinction does almost not influence the shape of bulges. There is no substantial difference between the shape of bulges in the optical and in the NIR. Our analysis reveals that 45% of all bulges are box- and peanut-shaped (b/p). The frequency of b/p bulges for all morphological types from S0 to Sd is > 40%. In particular, this is for the first time that such a large frequency of b/p bulges is reported for galaxies as late as Sd. The fraction of the observed b/p bulges is large enough to explain the b/p bulges by bars.