Groups: The rich, the poor and the destitute

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

I discuss recent observational results that suggest an evolutionary path for groups in which galaxy tidal interactions and mergers strip stars, dark matter, and gas from galaxies. As the group evolves, its velocity dispersion increases, the brightest group galaxy grows and moves toward the center of the potential, other giant galaxies merge, concentrating and/or creating their dwarf satellite populations, group members evolve from late to early types, and intragroup stars are drawn out of their host galaxies. Dark matter and gas are stripped from the galaxies' outer halos and dispersed into a common group halo. The ultimate evolution of this group may be an isolated elliptical or "fossil group". In this process, some evolved groups acquire the characteristics of rich clusters. Given that clusters themselves evolve via the accretion of poor groups from the field, there is evidence that galaxy evolution in groups dominates the evolution of the galaxies that ultimately end up as cluster members and that evolutionary mechanisms associated with clusters, such as ram pressure stripping or strangulation, are relatively unimportant.

Original languageEnglish (US)
Title of host publicationESO Astrophysics Symposia
Pages249-259
Number of pages11
Volume2007
DOIs
StatePublished - 2007

Publication series

NameESO Astrophysics Symposia
Volume2007
ISSN (Print)14312433
ISSN (Electronic)16116143

Fingerprint

galaxies
halos
dark matter
stars
galactic clusters
ram
concentrating
fossils
stripping
gases
strip
interactions

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Physics and Astronomy (miscellaneous)

Cite this

Zabludoff, A. I. (2007). Groups: The rich, the poor and the destitute. In ESO Astrophysics Symposia (Vol. 2007, pp. 249-259). (ESO Astrophysics Symposia; Vol. 2007). https://doi.org/10.1007/978-3-540-71173-5_42

Groups : The rich, the poor and the destitute. / Zabludoff, Ann I.

ESO Astrophysics Symposia. Vol. 2007 2007. p. 249-259 (ESO Astrophysics Symposia; Vol. 2007).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Zabludoff, AI 2007, Groups: The rich, the poor and the destitute. in ESO Astrophysics Symposia. vol. 2007, ESO Astrophysics Symposia, vol. 2007, pp. 249-259. https://doi.org/10.1007/978-3-540-71173-5_42
Zabludoff AI. Groups: The rich, the poor and the destitute. In ESO Astrophysics Symposia. Vol. 2007. 2007. p. 249-259. (ESO Astrophysics Symposia). https://doi.org/10.1007/978-3-540-71173-5_42
Zabludoff, Ann I. / Groups : The rich, the poor and the destitute. ESO Astrophysics Symposia. Vol. 2007 2007. pp. 249-259 (ESO Astrophysics Symposia).
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