The isolated fossil group RX J1119.7+2126

C. Adami, Dave Russell, F. Durret

Research output: Contribution to journalArticle

Abstract

Context. Fossil groups are galaxy structures that probably underwent a nearly complete fusion of all intermediate magnitude galaxies into a single large central dominant galaxy. However, the formation and evolution processes of these structures are still not well understood. Aims. In order to test this scenario and its implications we studied the fossil group RX J1119.7+2126, based on available spectroscopy of the galaxies in the low-density, large-scale region around the fossil group and deep B and R band imaging of its close vicinity and three comparison fields. Methods. We used spectroscopic data to investigate the degree of isolation of RX J1119.7+2126 in terms of bright neighbor galaxies. The imaging data were used to derive the color-magnitude relation and select faint galaxies statistically belonging to this structure. Results. The structure appears as a very isolated group exhibiting a red sequence in the color magnitude relation with characteristics close to the red sequences already observed for other fossil groups. Conclusions. All these results can be interpreted consistently in the framework of the building-up process generally proposed for fossil groups.

Original languageEnglish (US)
Pages (from-to)458-463
Number of pages6
JournalAstronomy and Astrophysics
Volume467
Issue number2
DOIs
StatePublished - May 1 2007

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fossils
fossil
galaxies
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galactic clusters
isolation
fusion
spectroscopy

Keywords

  • Galaxies: clusters: individual: RX J1119.7+2126

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

The isolated fossil group RX J1119.7+2126. / Adami, C.; Russell, Dave; Durret, F.

In: Astronomy and Astrophysics, Vol. 467, No. 2, 01.05.2007, p. 458-463.

Research output: Contribution to journalArticle

Adami, C. ; Russell, Dave ; Durret, F. / The isolated fossil group RX J1119.7+2126. In: Astronomy and Astrophysics. 2007 ; Vol. 467, No. 2. pp. 458-463.
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