THE DISCOVERY OF A GIANT DEBRIS ARC IN THE COMA CLUSTER

We present the discovery of a giant low-surface-brightness are, of len gth similar to 80 kpc, in the Coma cluster. The are consists of a diff use luminous matrix with surface brightness mu(B) < 26.5 mag arcsec(-2 ) and a number of embedded condensations. It is not associated with an y giant galaxy in Coma in particular; neither does it have the propert ies of a gravitational are. We argue that a fast interaction between t he nearby barred SO galaxy IC 4026 and either IC 4041 or RB 110 is the most natural explanation for the origin of the arc.