Two Extremely Compact Starbursts Inhabiting Clusters of Galaxies: Abell 539 and Abell 634

Details Two Extremely Compact Starbursts Inhabiting Clusters of Galaxies: Abell 539 and Abell 634 Two Extremely Compact Starbursts Inhabiting Clusters of Galaxies: Abell 539 and Abell 634

Jun 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008aspc..390..198r&link_type=abstract

Pathways Through an Eclectic Universe ASP Conference Series, Vol. 390, proceedings of the conference held 23-27 April, 2007 at S

Astronomy and Astrophysics

Astronomy

Scientific paper

Two extremely compact Hα-emitting sources have been discovered in our deep images of the Abell 539 and Abell 634 clusters of galaxies. Follow-up spectroscopy of these two unresolved sources have revealed that they are active starburst members of their respective clusters. The Hα luminosities and extreme Hα equivalent widths (of ≃ 430 Å and 1010 Å, respectively) of these sources, together with their very compact appearance, have raised the question of their origin and the triggering of such active star formation in the cluster environments. Possible triggering mechanisms are pointed out, together with possible links with the recently discovered early-type ultra-compact dwarf galaxies.

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