Astronomy and Astrophysics – Astrophysics
Scientific paper
2003-05-19
Astron.Astrophys. 407 (2003) 61-74
Astronomy and Astrophysics
Astrophysics
Submitted to A & A (accepted); Please find high resolution version on http://www.astro.uu.se/~kambiz/DOC/paper-bulges.pdf
Scientific paper
10.1051/0004-6361:20030720
We study HST/NICMOS H-band images of bulges of two equal-sized samples of early- (T(RC3) < 4) and late-type spiral (mainly Sbc-Sc) galaxies matched in outer disk axis ratio. We find that bulges of late-type spirals are more elongated than their counterparts in early-type spirals. Using a KS-test we find that the two distributions are different at the 98.4% confidence level. We conclude that the two data sets are different, i.e. late-type galaxies have a broader ellipticity distribution and contain more elongated features in the inner regions. We discuss the possibility that these would correspond to bars at a later evolutionary stage, i.e. secularly evolved bars. Consequent implications are raised, and we discuss relevant questions regarding the formation and structure of bulges. Are bulges of early-type and late-type spirals different? Are their formation scenarios different? Can we talk about bulges in the same way for different types of galaxies?
Fathi Kambiz
Peletier Reynier F.
No associations
LandOfFree
Do Bulges of Early- and Late-type Spirals Have Different Morphology? does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Do Bulges of Early- and Late-type Spirals Have Different Morphology?, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Do Bulges of Early- and Late-type Spirals Have Different Morphology? will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-153633