Astronomy and Astrophysics – Astrophysics
Scientific paper
2002-10-25
Astronomy and Astrophysics
Astrophysics
4 pages, 2 figures. To appear in the proceedings of the ESO workshop "Extragalactic Globular Cluster Systems", August 2002, Ga
Scientific paper
10.1007/10857603_31
Analyses of B and R band observations of four compact groups reveal the presence of a considerable amount of diffuse, intergalactic light in two of them (HCG 79 and HCG 95). The diffuse component is presumably due to stellar material that has been tidally stripped from the galaxy group members. A new approach is used to measure this diffuse background light, using wavelet techniques for detecting low surface brightness signals. The diffuse light component has a mean colour of $(B-R)$ = 1.4 - 1.5$\pm$0.1 and it comprises the following fractions of the total group light in the B band: 18%, 12%, 3% and 0% for groups HCG 95, HCG 79, HCG 92 and HCG 88, respectively. The diffuse light content of a group may represent an efficient tool for the determination of how long groups have been together in a compact configuration.
Bolte Michael
de Oliveira Mendes Cl.
Pereira D. N. E.
Rabaca Carlos Roberto
Rocha Cristiano Da
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