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Date and Time of the Query: 2019-03-26 T05:45:24 PDT
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For refcode 2004A&A...417..527L:
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Copyright by European Southern Observatory (ESO). Reproduced by permission
2004A&A...417..527L Box- and peanut-shaped bulges III. A new class of bulges: Thick Boxy Bulges R. Lutticke, M. Pohlen and R.-J. Dettmar Received 3 December 2001 / Accepted 19 December 2003 Inspecting all 1224 edge-on disk galaxies larger than 2 ' in the RC3 on Digitized Sky Survey (DSS) images (Lutticke et al. 2000a) we have found several galaxies with extraordinary bulges meeting two criteria: they are box shaped and large in respect to the diameters of their galaxies. These bulges are often disturbed, show frequently prominent irregularities and asymmetries, and some possess possible merger remnants or merging satellites. For these bulges we have introduced the term "Thick Boxy Bulges" (TBBs). About 2% of all disk galaxies (S0-Sd), respectively 4% of all galaxies with box- and peanut-shaped (b/p) bulges, belong to this class of galaxies. Using multicolour CCD and NIR data we have enlarged and followed up our sample of nearly 20 galaxies with a TBB. The disturbed morphology of a large fraction of these galaxies shows that many of the TBB galaxies are not dynamically settled. For the TBBs the extent of the box shape seems to be too large to result from a normal bar potential. Therefore we conclude that two classes of b/p bulges exist with different origins. While most (96%) b/p bulges can be explained by bars alone (Lutticke et al. 2000b), the extended boxy structures of TBBs result most likely from accreted material by infalling satellite companions (soft merging). Keywords: galaxies: bulges, galaxies: evolution, galaxies: interactions, galaxies: spiral, galaxies: statistics, galaxies: structure
Retrieve 36 NED objects in this reference.
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