摘要：Stellar streams are regarded as crucial objects for testing galaxy formation models because their morphology traces the underlying potentials and their occurrence tracks the assembly history of the galaxies. The existence of one of the most iconic stellar streams, the double loop around NGC 5907, has recently been questioned by new observations with the Dragonfly telescope. This new work only finds parts of the stream, even though a 1σsurface brightness limit of 30.3 mag arcsec−2in thegband was reached. Using 7.2 h of luminanceL-band imaging with theMilanković1.4-m telescope, we have reobserved the putative double-loop part to confirm or reject this assessment. We do not find signs of the double loop, but see only a single knee-shaped stellar stream. Comparing our results to the data by the Dragonfly team, we find the same features. Our observations reach a 1σsurface brightness limit of 29.7 mag arcsec−2in thegband. These findings emphasize the need for independent confirmation of detections of very low-surface brightness features.
关键词：engalaxies: individual: NGC 5907galaxies: formationtechniques: image processinggalaxies: interactionsgalaxies: structure
