Hostname: page-component-cd9895bd7-q99xh Total loading time: 0 Render date: 2024-12-26T10:11:46.711Z Has data issue: false hasContentIssue false
  • English
  • Français

Minor Mergers and the Formation of Shell Galaxies

Published online by Cambridge University Press:  12 April 2016

V. Charmandaris  and
F. Combes
V. Charmandaris
Affiliation:
Observatoire de Paris, DEMIRM, 61 Ave. de l’Observatoire, F-75014, Paris, France
F. Combes
Affiliation:
Observatoire de Paris, DEMIRM, 61 Ave. de l’Observatoire, F-75014, Paris, France

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 present a new mechanism which can explain the observed radial displacement between the stellar and gaseous shells observed around early type galaxies. Our model is based on the well-known phasewrapping process taking into account that a fraction of the interstellar medium is clumpy and consequently it experiences a low dynamical friction during a merging event. Moreover, our recent detection of cold molecular gas associated with the outer shells of Centaurus A is in agreement with the proposed model. This suggests that a considerable fraction of molecular gas in minor mergers may be distributed away from the nuclear regions and remain undetected.

Type
Part 3. Numerical Simulations
Information
International Astronomical Union Colloquium , Volume 174: Small Galaxy Groups , 2000 , pp. 273 - 276
Copyright
Copyright © Astronomical Society of the Pacific 2000

References

Braine, J., & Combes, F. 1992, A&AS, 264, 433 Google Scholar
Charmandaris, V., Combes, F., & van der Hulst, J-M. 1999, in prepGoogle Scholar
Combes, F., & Charmandaris, V. 1999, in prepGoogle Scholar
Dupraz, C., & Combes, F. 1986, A&AS, 166, 53 Google Scholar
Dupraz, C., & Combes, F. 1987, A&AS, 185, L1 Google Scholar
Hernquist, L., & Quinn, P. 1989, ApJ, 342, 1 Google Scholar
Kojima, M., & Noguchi, M. 1997, ApJ, 481, 132 Google Scholar
Petric, A., et al. 1997, BAAS, 191, 8212 Google Scholar
Quinn, P.J. 1984, ApJ, 279, 596 Google Scholar
Schiminovich, D., et al. 1994, ApJ, 423, L101 Google Scholar
Schiminovich, D., et al. 1995, ApJ, 444, L77 Google Scholar
Weil, M.L., & Hernquist, L. 1993, ApJ, 405, 142 CrossRefGoogle Scholar