Hostname: page-component-78c5997874-mlc7c Total loading time: 0 Render date: 2024-11-10T21:22:36.672Z Has data issue: false hasContentIssue false
  • English
  • Français

Nature of bulges in the Hubble sequence

Published online by Cambridge University Press:  01 July 2007

Eija Laurikainen ,
H. Salo ,
R. Buta  and
J. H. Knapen
Eija Laurikainen
Affiliation:
Division of Astronomy, Dept. of Phys. Sci., Univ. of Oulu, Finland email: eija.laurikainen@oulu.fi
H. Salo
Affiliation:
Division of Astronomy, Dept. of Phys. Sci., Univ. of Oulu, Finland email: eija.laurikainen@oulu.fi
R. Buta
Affiliation:
Department of Physics and Astronomy, Univ. of Alabama, USA
J. H. Knapen
Affiliation:
Instituto de Astrofisica de Canarias, E-38200, La Laguna, Spain
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

We evaluate the nature of bulges in the Hubble sequence, based on an analysis of 216 disk galaxies of all morphological types (S0-Sd). For this purpose we collect our various analysis made separately for early and late-type galaxies, published in a series of papers. Using the criteria by Kormendy & Kennicutt we find strong evidence of pseudobulges in all Hubble types, including S0s. However, due to the relatively massive bulges in S0-S0/a galaxies it is not probable that the (pseudo)bulges in these galaxies were formed in a similar manner as in spirals. More likely, pseudobulges particularly in strongly barred early-type disk galaxies are suggested to be a combination of star formation and the nearly exponential central components of bars.

Keywords

galaxies: structuregalaxies: bulgesgalaxies: evolution
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 3 , Symposium S245: Formation and Evolution of Galaxy Bulges , July 2007 , pp. 309 - 310
Copyright
Copyright © International Astronomical Union 2008

References

Athanassoula, E. & Misioritis, A. 2002, MNRAS 330, 35CrossRefGoogle Scholar
Athanassoula, E., Lambert, J. C., & Dehnen, W. 2005, MNRAS, 363, 496CrossRefGoogle Scholar
Buta, R., Laurikainen, E., & Salo, H. 2006, AJ, 132, 1859CrossRefGoogle Scholar
Cappellari, et al. 2005, astro-ph/073533Google Scholar
Eskridge, P. et al. 2002, ApJS, 143, 73CrossRefGoogle Scholar
Kormendy, J., & Kennicutt, R. C. Jr. 2004, Ann Rev Astr Ap, Vol 42, 603CrossRefGoogle Scholar
Laurikainen, E., Salo, H., & Buta, R. 2005, MNRAS, 362, 1319CrossRefGoogle Scholar
Laurikainen, E., Salo, H., Buta, R., Knapen, J., Speltincx, T., & Block, D. 2006, AJ, 132, 2634CrossRefGoogle Scholar
Laurikainen, E., Salo, H., Buta, R., & Knapen, J. H. 2007, accepted to MNRASGoogle Scholar